/
ccxInpWriter.py
1022 lines (929 loc) · 53.4 KB
/
ccxInpWriter.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
# ***************************************************************************
# * *
# * Copyright (c) 2015 - Przemo Firszt <przemo@firszt.eu> *
# * Copyright (c) 2015 - Bernd Hahnebach <bernd@bimstatik.org> *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * This program is distributed in the hope that it will be useful, *
# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
# * GNU Library General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with this program; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
import FreeCAD
import os
import sys
import time
__title__ = "ccxInpWriter"
__author__ = "Przemo Firszt, Bernd Hahnebach"
__url__ = "http://www.freecadweb.org"
class inp_writer:
def __init__(self, analysis_obj, mesh_obj, mat_obj,
fixed_obj,
force_obj, pressure_obj,
beamsection_obj, shellthickness_obj,
analysis_type=None, eigenmode_parameters=None,
dir_name=None):
self.dir_name = dir_name
self.analysis = analysis_obj
self.mesh_object = mesh_obj
self.material_objects = mat_obj
self.fixed_objects = fixed_obj
self.force_objects = force_obj
self.pressure_objects = pressure_obj
if eigenmode_parameters:
self.no_of_eigenfrequencies = eigenmode_parameters[0]
self.eigenfrequeny_range_low = eigenmode_parameters[1]
self.eigenfrequeny_range_high = eigenmode_parameters[2]
self.analysis_type = analysis_type
self.beamsection_objects = beamsection_obj
self.shellthickness_objects = shellthickness_obj
if not dir_name:
self.dir_name = FreeCAD.ActiveDocument.TransientDir.replace('\\', '/') + '/FemAnl_' + analysis_obj.Uid[-4:]
if not os.path.isdir(self.dir_name):
os.mkdir(self.dir_name)
self.base_name = self.mesh_object.Name
self.file_name = self.dir_name + '/' + self.base_name + '.inp'
self.fc_ver = FreeCAD.Version()
self.ccx_eall = 'Eall'
self.ccx_elsets = []
def write_calculix_input_file(self):
self.mesh_object.FemMesh.writeABAQUS(self.file_name)
# reopen file with "append" and add the analysis definition
inpfile = open(self.file_name, 'a')
inpfile.write('\n\n')
self.write_element_sets_material_and_femelement_type(inpfile)
self.write_node_sets_constraints_fixed(inpfile)
if self.analysis_type is None or self.analysis_type == "static":
self.write_node_sets_constraints_force(inpfile)
self.write_materials(inpfile)
self.write_femelementsets(inpfile)
self.write_step_begin(inpfile)
self.write_constraints_fixed(inpfile)
if self.analysis_type is None or self.analysis_type == "static":
self.write_constraints_force(inpfile)
self.write_constraints_pressure(inpfile)
elif self.analysis_type == "frequency":
self.write_frequency(inpfile)
self.write_outputs_types(inpfile)
self.write_step_end(inpfile)
self.write_footer(inpfile)
inpfile.close()
return self.file_name
def write_element_sets_material_and_femelement_type(self, f):
if len(self.material_objects) == 1:
if self.beamsection_objects and len(self.beamsection_objects) == 1: # single mat, single beam
self.get_ccx_elsets_single_mat_single_beam()
elif self.beamsection_objects and len(self.beamsection_objects) > 1: # single mat, multiple beams
self.get_ccx_elsets_single_mat_multiple_beam()
elif self.shellthickness_objects and len(self.shellthickness_objects) == 1: # single mat, single shell
self.get_ccx_elsets_single_mat_single_shell()
elif self.shellthickness_objects and len(self.shellthickness_objects) > 1: # single mat, multiple shells
self.get_ccx_elsets_single_mat_multiple_shell()
else: # single mat, solid
self.get_ccx_elsets_single_mat_solid()
else:
if self.beamsection_objects and len(self.beamsection_objects) == 1: # multiple mats, single beam
self.get_ccx_elsets_multiple_mat_single_beam()
elif self.beamsection_objects and len(self.beamsection_objects) > 1: # multiple mats, multiple beams
self.get_ccx_elsets_multiple_mat_multiple_beam()
elif self.shellthickness_objects and len(self.shellthickness_objects) == 1: # multiple mats, single shell
self.get_ccx_elsets_multiple_mat_single_shell()
elif self.shellthickness_objects and len(self.shellthickness_objects) > 1: # multiple mats, multiple shells
self.get_ccx_elsets_multiple_mat_multiple_shell()
else: # multiple mats, solid
self.get_ccx_elsets_multiple_mat_solid()
f.write('\n***********************************************************\n')
f.write('** Element sets for materials and FEM element type (solid, shell, beam)\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
for ccx_elset in self.ccx_elsets:
# print(ccx_elset)
f.write('*ELSET,ELSET=' + ccx_elset['ccx_elset_name'] + '\n')
if ccx_elset['ccx_elset'] == self.ccx_eall:
f.write(self.ccx_eall + '\n')
else:
for elid in ccx_elset['ccx_elset']:
f.write(str(elid) + ',\n')
def write_node_sets_constraints_fixed(self, f):
f.write('\n***********************************************************\n')
f.write('** Node set for fixed constraint\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
for fobj in self.fixed_objects:
fix_obj = fobj['Object']
f.write('*NSET,NSET=' + fix_obj.Name + '\n')
for o, elem in fix_obj.References:
fo = o.Shape.getElement(elem)
n = []
if fo.ShapeType == 'Face':
n = self.mesh_object.FemMesh.getNodesByFace(fo)
elif fo.ShapeType == 'Edge':
n = self.mesh_object.FemMesh.getNodesByEdge(fo)
elif fo.ShapeType == 'Vertex':
n = self.mesh_object.FemMesh.getNodesByVertex(fo)
for i in n:
f.write(str(i) + ',\n')
def write_node_sets_constraints_force(self, f):
for fobj in self.force_objects:
frc_obj = fobj['Object']
# in GUI defined frc_obj all ref_shape have the same shape type
# TODO in FemTools: check if all RefShapes really have the same type an write type to dictionary
fobj['RefShapeType'] = ''
if frc_obj.References:
first_ref_obj = frc_obj.References[0]
first_ref_shape = first_ref_obj[0].Shape.getElement(first_ref_obj[1])
fobj['RefShapeType'] = first_ref_shape.ShapeType
else:
# frc_obj.References could be empty ! # TODO in FemTools: check
FreeCAD.Console.PrintError('At least one Force Object has empty References!\n')
if fobj['RefShapeType'] == 'Vertex':
pass # point load on vertices --> the FemElementTable is not needed for node load calculation
elif fobj['RefShapeType'] == 'Face' and is_solid_mesh(self.mesh_object.FemMesh) and not has_no_face_data(self.mesh_object.FemMesh):
pass # solid_mesh with face data --> the FemElementTable is not needed for node load calculation
else:
if not hasattr(self, 'fem_element_table'):
self.fem_element_table = getFemElementTable(self.mesh_object.FemMesh)
f.write('\n***********************************************************\n')
f.write('** Node sets for loads\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
for fobj in self.force_objects:
if fobj['RefShapeType'] == 'Vertex':
frc_obj = fobj['Object']
f.write('*NSET,NSET=' + frc_obj.Name + '\n')
NbrForceNodes = 0
for o, elem in frc_obj.References:
fo = o.Shape.getElement(elem)
n = []
n = self.mesh_object.FemMesh.getNodesByVertex(fo)
for i in n:
f.write(str(i) + ',\n')
NbrForceNodes = NbrForceNodes + 1 # NodeSum of mesh-nodes of ALL reference shapes from force_object
# calculate node load
if NbrForceNodes != 0:
fobj['NodeLoad'] = (frc_obj.Force) / NbrForceNodes
f.write('** concentrated load [N] distributed on all mesh nodes of the given vertieces\n')
f.write('** ' + str(frc_obj.Force) + ' N / ' + str(NbrForceNodes) + ' Nodes = ' + str(fobj['NodeLoad']) + ' N on each node\n')
else:
f.write('** no point load on vertices --> no set for node loads\n')
def write_materials(self, f):
f.write('\n***********************************************************\n')
f.write('** Materials\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
f.write('** Young\'s modulus unit is MPa = N/mm2\n')
for m in self.material_objects:
mat_obj = m['Object']
# get material properties
YM = FreeCAD.Units.Quantity(mat_obj.Material['YoungsModulus'])
YM_in_MPa = YM.getValueAs('MPa')
PR = float(mat_obj.Material['PoissonRatio'])
mat_name = mat_obj.Material['Name'][:80]
# write material properties
f.write('*MATERIAL, NAME=' + mat_name + '\n')
f.write('*ELASTIC \n')
f.write('{}, \n'.format(YM_in_MPa))
f.write('{0:.3f}\n'.format(PR))
density = FreeCAD.Units.Quantity(mat_obj.Material['Density'])
density_in_tone_per_mm3 = float(density.getValueAs('t/mm^3'))
f.write('*DENSITY \n')
f.write('{0:.3e}, \n'.format(density_in_tone_per_mm3))
def write_femelementsets(self, f):
f.write('\n***********************************************************\n')
f.write('** Sections\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
for ccx_elset in self.ccx_elsets:
if 'beamsection_obj'in ccx_elset: # beam mesh
beamsec_obj = ccx_elset['beamsection_obj']
elsetdef = 'ELSET=' + ccx_elset['ccx_elset_name'] + ', '
material = 'MATERIAL=' + ccx_elset['ccx_mat_name']
setion_def = '*BEAM SECTION, ' + elsetdef + material + ', SECTION=RECT\n'
setion_geo = str(beamsec_obj.Height.getValueAs('mm')) + ', ' + str(beamsec_obj.Width.getValueAs('mm')) + '\n'
f.write(setion_def)
f.write(setion_geo)
elif 'shellthickness_obj'in ccx_elset: # shell mesh
shellth_obj = ccx_elset['shellthickness_obj']
elsetdef = 'ELSET=' + ccx_elset['ccx_elset_name'] + ', '
material = 'MATERIAL=' + ccx_elset['ccx_mat_name']
setion_def = '*SHELL SECTION, ' + elsetdef + material + '\n'
setion_geo = str(shellth_obj.Thickness.getValueAs('mm')) + '\n'
f.write(setion_def)
f.write(setion_geo)
else: # solid mesh
elsetdef = 'ELSET=' + ccx_elset['ccx_elset_name'] + ', '
material = 'MATERIAL=' + ccx_elset['ccx_mat_name']
setion_def = '*SOLID SECTION, ' + elsetdef + material + '\n'
f.write(setion_def)
def write_step_begin(self, f):
f.write('\n***********************************************************\n')
f.write('** One step is needed to calculate the mechanical analysis of FreeCAD\n')
f.write('** loads are applied quasi-static, means without involving the time dimension\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
f.write('*STEP\n')
f.write('*STATIC\n')
def write_constraints_fixed(self, f):
f.write('\n***********************************************************\n')
f.write('** Constaints\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
for fixed_object in self.fixed_objects:
fix_obj_name = fixed_object['Object'].Name
f.write('*BOUNDARY\n')
f.write(fix_obj_name + ',1\n')
f.write(fix_obj_name + ',2\n')
f.write(fix_obj_name + ',3\n')
if self.beamsection_objects or self.shellthickness_objects:
f.write(fix_obj_name + ',4\n')
f.write(fix_obj_name + ',5\n')
f.write(fix_obj_name + ',6\n')
f.write('\n')
def write_constraints_force(self, f):
f.write('\n***********************************************************\n')
f.write('** Node loads\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
f.write('*CLOAD\n')
for fobj in self.force_objects:
frc_obj = fobj['Object']
f.write('** ' + frc_obj.Name + '\n')
direction_vec = frc_obj.DirectionVector
if frc_obj.Force == 0:
print(' Warning --> Force = 0')
if fobj['RefShapeType'] == 'Vertex': # point load on vertieces
node_load = fobj['NodeLoad']
frc_obj_name = frc_obj.Name
f.write('** force: ' + str(node_load) + ' N, direction: ' + str(direction_vec) + '\n')
v1 = "{:.13E}".format(direction_vec.x * node_load)
v2 = "{:.13E}".format(direction_vec.y * node_load)
v3 = "{:.13E}".format(direction_vec.z * node_load)
f.write(frc_obj_name + ',1,' + v1 + '\n')
f.write(frc_obj_name + ',2,' + v2 + '\n')
f.write(frc_obj_name + ',3,' + v3 + '\n\n')
elif fobj['RefShapeType'] == 'Edge': # line load on edges
sum_ref_edge_length = 0
sum_ref_edge_node_length = 0 # for debugging
sum_node_load = 0 # for debugging
for o, elem in frc_obj.References:
elem_o = o.Shape.getElement(elem)
sum_ref_edge_length += elem_o.Length
if sum_ref_edge_length != 0:
force_per_sum_ref_edge_length = frc_obj.Force / sum_ref_edge_length
for o, elem in frc_obj.References:
elem_o = o.Shape.getElement(elem)
ref_edge = elem_o
# edge_table = { meshedgeID : ( nodeID, ... , nodeID ) }
edge_table = self.get_refedge_node_table(ref_edge)
# node_length_table = [ (nodeID, length), ... , (nodeID, length) ] some nodes will have more than one entry
node_length_table = self.get_refedge_node_lengths(edge_table)
# node_sum_length_table = { nodeID : Length, ... , nodeID : Length } LengthSum for each node, one entry for each node
node_sum_length_table = self.get_ref_shape_node_sum_geom_table(node_length_table)
# node_load_table = { nodeID : NodeLoad, ... , nodeID : NodeLoad } NodeLoad for each node, one entry for each node
node_load_table = {}
sum_node_lengths = 0 # for debugging
for node in node_sum_length_table:
sum_node_lengths += node_sum_length_table[node] # for debugging
node_load_table[node] = node_sum_length_table[node] * force_per_sum_ref_edge_length
ratio_refedge_lengths = sum_node_lengths / elem_o.Length
if ratio_refedge_lengths < 0.99 or ratio_refedge_lengths > 1.01:
FreeCAD.Console.PrintError('Error on: ' + frc_obj.Name + ' --> ' + o.Name + '.' + elem + '\n')
print(' sum_node_lengths:', sum_node_lengths)
print(' refedge_length: ', elem_o.Length)
bad_refedge = elem_o
sum_ref_edge_node_length += sum_node_lengths
f.write('** node loads on element ' + fobj['RefShapeType'] + ': ' + o.Name + ':' + elem + '\n')
for n in sorted(node_load_table):
node_load = node_load_table[n]
sum_node_load += node_load # for debugging
if (direction_vec.x != 0.0):
v1 = "{:.13E}".format(direction_vec.x * node_load)
f.write(str(n) + ',1,' + v1 + '\n')
if (direction_vec.y != 0.0):
v2 = "{:.13E}".format(direction_vec.y * node_load)
f.write(str(n) + ',2,' + v2 + '\n')
if (direction_vec.z != 0.0):
v3 = "{:.13E}".format(direction_vec.z * node_load)
f.write(str(n) + ',3,' + v3 + '\n')
f.write('\n')
f.write('\n')
ratio = sum_node_load / frc_obj.Force
if ratio < 0.99 or ratio > 1.01:
print('Deviation sum_node_load to frc_obj.Force is more than 1% : ', ratio)
print(' sum_ref_edge_node_length: ', sum_ref_edge_node_length)
print(' sum_ref_edge_length: ', sum_ref_edge_length)
print(' sum_node_load: ', sum_node_load)
print(' frc_obj.Force: ', frc_obj.Force)
print(' the reason could be simply a circle length --> see method get_ref_edge_node_lengths')
print(' the reason could also be an problem in retrieving the ref_edge_node_length')
# try debugging of the last bad refedge
print('DEBUGGING')
print(bad_refedge)
print('bad_refedge_nodes')
bad_refedge_nodes = self.mesh_object.FemMesh.getNodesByEdge(bad_refedge)
print(len(bad_refedge_nodes))
print(bad_refedge_nodes)
# import FreeCADGui
# FreeCADGui.ActiveDocument.Compound_Mesh.HighlightedNodes = bad_refedge_nodes
print('bad_edge_table')
# bad_edge_table = { meshedgeID : ( nodeID, ... , nodeID ) }
bad_edge_table = self.get_refedge_node_table(bad_refedge)
print(len(bad_edge_table))
bad_edge_table_nodes = []
for elem in bad_edge_table:
print(elem, ' --> ', bad_edge_table[elem])
for node in bad_edge_table[elem]:
if node not in bad_edge_table_nodes:
bad_edge_table_nodes.append(node)
print('sorted(bad_edge_table_nodes)')
print(sorted(bad_edge_table_nodes)) # should be == bad_refedge_nodes
# import FreeCADGui
# FreeCADGui.ActiveDocument.Compound_Mesh.HighlightedNodes = bad_edge_table_nodes
# bad_node_length_table = [ (nodeID, length), ... , (nodeID, length) ] some nodes will have more than one entry
print('good_edge_table')
good_edge_table = delete_duplicate_mesh_elements(bad_edge_table)
for elem in good_edge_table:
print(elem, ' --> ', bad_edge_table[elem])
print('bad_node_length_table')
bad_node_length_table = self.get_refedge_node_lengths(bad_edge_table)
for n, l in bad_node_length_table:
print(n, ' --> ', l)
elif fobj['RefShapeType'] == 'Face': # area load on faces
sum_ref_face_area = 0
sum_ref_face_node_area = 0 # for debugging
sum_node_load = 0 # for debugging
for o, elem in frc_obj.References:
elem_o = o.Shape.getElement(elem)
sum_ref_face_area += elem_o.Area
if sum_ref_face_area != 0:
force_per_sum_ref_face_area = frc_obj.Force / sum_ref_face_area
for o, elem in frc_obj.References:
elem_o = o.Shape.getElement(elem)
ref_face = elem_o
# face_table = { meshfaceID : ( nodeID, ... , nodeID ) }
face_table = self.get_ref_face_node_table(ref_face)
# node_area_table = [ (nodeID, Area), ... , (nodeID, Area) ] some nodes will have more than one entry
node_area_table = self.get_ref_face_node_areas(face_table)
# node_sum_area_table = { nodeID : Area, ... , nodeID : Area } AreaSum for each node, one entry for each node
node_sum_area_table = self.get_ref_shape_node_sum_geom_table(node_area_table)
# node_load_table = { nodeID : NodeLoad, ... , nodeID : NodeLoad } NodeLoad for each node, one entry for each node
node_load_table = {}
sum_node_areas = 0 # for debugging
for node in node_sum_area_table:
sum_node_areas += node_sum_area_table[node] # for debugging
node_load_table[node] = node_sum_area_table[node] * force_per_sum_ref_face_area
ratio_refface_areas = sum_node_areas / elem_o.Area
if ratio_refface_areas < 0.99 or ratio_refface_areas > 1.01:
FreeCAD.Console.PrintError('Error on: ' + frc_obj.Name + ' --> ' + o.Name + '.' + elem + '\n')
print(' sum_node_lengths:', sum_node_areas)
print(' refedge_length: ', elem_o.Area)
sum_ref_face_node_area += sum_node_areas
f.write('** node loads on element ' + fobj['RefShapeType'] + ': ' + o.Name + ':' + elem + '\n')
for n in sorted(node_load_table):
node_load = node_load_table[n]
sum_node_load += node_load # for debugging
if (direction_vec.x != 0.0):
v1 = "{:.13E}".format(direction_vec.x * node_load)
f.write(str(n) + ',1,' + v1 + '\n')
if (direction_vec.y != 0.0):
v2 = "{:.13E}".format(direction_vec.y * node_load)
f.write(str(n) + ',2,' + v2 + '\n')
if (direction_vec.z != 0.0):
v3 = "{:.13E}".format(direction_vec.z * node_load)
f.write(str(n) + ',3,' + v3 + '\n')
f.write('\n')
f.write('\n')
ratio = sum_node_load / frc_obj.Force
if ratio < 0.99 or ratio > 1.01:
print('Deviation sum_node_load to frc_obj.Force is more than 1% : ', ratio)
print(' sum_ref_face_node_area: ', sum_ref_face_node_area)
print(' sum_ref_face_area: ', sum_ref_face_area)
print(' sum_node_load: ', sum_node_load)
print(' frc_obj.Force: ', frc_obj.Force)
print(' the reason could be simply a circle area --> see method get_ref_face_node_areas')
print(' the reason could also be an problem in retrieving the ref_face_node_area')
def write_constraints_pressure(self, f):
f.write('\n***********************************************************\n')
f.write('** Element + CalculiX face + load in [MPa]\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
for fobj in self.pressure_objects:
prs_obj = fobj['Object']
f.write('*DLOAD\n')
for o, e in prs_obj.References:
rev = -1 if prs_obj.Reversed else 1
elem = o.Shape.getElement(e)
if elem.ShapeType == 'Face':
v = self.mesh_object.FemMesh.getccxVolumesByFace(elem)
f.write("** Load on face {}\n".format(e))
for i in v:
f.write("{},P{},{}\n".format(i[0], i[1], rev * prs_obj.Pressure))
def write_frequency(self, f):
f.write('\n***********************************************************\n')
f.write('** Frequency analysis\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
f.write('*FREQUENCY\n')
f.write('{},{},{}\n'.format(self.no_of_eigenfrequencies, self.eigenfrequeny_range_low, self.eigenfrequeny_range_high))
def write_outputs_types(self, f):
f.write('\n***********************************************************\n')
f.write('** Outputs --> frd file\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
if self.beamsection_objects or self.shellthickness_objects:
f.write('*NODE FILE, OUTPUT=2d\n')
else:
f.write('*NODE FILE\n')
f.write('U\n')
f.write('*EL FILE\n')
f.write('S, E\n')
f.write('** outputs --> dat file\n')
f.write('*NODE PRINT , NSET=Nall \n')
f.write('U \n')
f.write('*EL PRINT , ELSET=Eall \n')
f.write('S \n')
def write_step_end(self, f):
f.write('\n***********************************************************\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
f.write('*END STEP \n')
def write_footer(self, f):
f.write('\n***********************************************************\n')
f.write('** CalculiX Input file\n')
f.write('** written by {} function\n'.format(sys._getframe().f_code.co_name))
f.write('** written by --> FreeCAD ' + self.fc_ver[0] + '.' + self.fc_ver[1] + '.' + self.fc_ver[2] + '\n')
f.write('** written on --> ' + time.ctime() + '\n')
f.write('** file name --> ' + os.path.basename(FreeCAD.ActiveDocument.FileName) + '\n')
f.write('** analysis name --> ' + self.analysis.Name + '\n')
f.write('**\n')
f.write('**\n')
f.write('**\n')
f.write('** Units\n')
f.write('**\n')
f.write('** Geometry (mesh data) --> mm\n')
f.write("** Materials (Young's modulus) --> N/mm2 = MPa\n")
f.write('** Loads (nodal loads) --> N\n')
f.write('**\n')
# self.ccx_elsets = [ {
# 'beamsection_obj' : 'beamsection_obj' if exists
# 'shellthickness_obj' : shellthickness_obj' if exists
# 'ccx_elset' : [e1, e2, e3, ... , en] or string self.ccx_eall
# 'ccx_elset_name' : 'ccx_identifier_elset'
# 'mat_obj_name' : 'mat_obj.Name'
# 'ccx_mat_name' : 'mat_obj.Material['Name'][:80]' !!! not unique !!!
# },
# {}, ... , {} ]
def get_ccx_elsets_single_mat_single_beam(self):
mat_obj = self.material_objects[0]['Object']
beamsec_obj = self.beamsection_objects[0]['Object']
ccx_elset = {}
ccx_elset['beamsection_obj'] = beamsec_obj
ccx_elset['ccx_elset'] = self.ccx_eall
ccx_elset['ccx_elset_name'] = get_ccx_elset_beam_name(mat_obj.Name, beamsec_obj.Name)
ccx_elset['mat_obj_name'] = mat_obj.Name
ccx_elset['ccx_mat_name'] = mat_obj.Material['Name'][:80]
self.ccx_elsets.append(ccx_elset)
def get_ccx_elsets_single_mat_single_shell(self):
mat_obj = self.material_objects[0]['Object']
shellth_obj = self.shellthickness_objects[0]['Object']
ccx_elset = {}
ccx_elset['shellthickness_obj'] = shellth_obj
ccx_elset['ccx_elset'] = self.ccx_eall
ccx_elset['ccx_elset_name'] = get_ccx_elset_shell_name(mat_obj.Name, shellth_obj.Name)
ccx_elset['mat_obj_name'] = mat_obj.Name
ccx_elset['ccx_mat_name'] = mat_obj.Material['Name'][:80]
self.ccx_elsets.append(ccx_elset)
def get_ccx_elsets_single_mat_solid(self):
mat_obj = self.material_objects[0]['Object']
ccx_elset = {}
ccx_elset['ccx_elset'] = self.ccx_eall
ccx_elset['ccx_elset_name'] = get_ccx_elset_solid_name(mat_obj.Name)
ccx_elset['mat_obj_name'] = mat_obj.Name
ccx_elset['ccx_mat_name'] = mat_obj.Material['Name'][:80]
self.ccx_elsets.append(ccx_elset)
def get_ccx_elsets_single_mat_multiple_beam(self):
mat_obj = self.material_objects[0]['Object']
self.get_femelement_sets(self.beamsection_objects)
for beamsec_data in self.beamsection_objects:
beamsec_obj = beamsec_data['Object']
ccx_elset = {}
ccx_elset['beamsection_obj'] = beamsec_obj
ccx_elset['ccx_elset'] = beamsec_data['FEMElements']
ccx_elset['ccx_elset_name'] = get_ccx_elset_beam_name(mat_obj.Name, beamsec_obj.Name, None, beamsec_data['ShortName'])
ccx_elset['mat_obj_name'] = mat_obj.Name
ccx_elset['ccx_mat_name'] = mat_obj.Material['Name'][:80]
self.ccx_elsets.append(ccx_elset)
def get_ccx_elsets_single_mat_multiple_shell(self):
mat_obj = self.material_objects[0]['Object']
self.get_femelement_sets(self.shellthickness_objects)
for shellth_data in self.shellthickness_objects:
shellth_obj = shellth_data['Object']
ccx_elset = {}
ccx_elset['shellthickness_obj'] = shellth_obj
ccx_elset['ccx_elset'] = shellth_data['FEMElements']
ccx_elset['ccx_elset_name'] = get_ccx_elset_shell_name(mat_obj.Name, shellth_obj.Name, None, shellth_data['ShortName'])
ccx_elset['mat_obj_name'] = mat_obj.Name
ccx_elset['ccx_mat_name'] = mat_obj.Material['Name'][:80]
self.ccx_elsets.append(ccx_elset)
def get_ccx_elsets_multiple_mat_single_beam(self):
beamsec_obj = self.beamsection_objects[0]['Object']
self.get_femelement_sets(self.material_objects)
for mat_data in self.material_objects:
mat_obj = mat_data['Object']
ccx_elset = {}
ccx_elset['beamsection_obj'] = beamsec_obj
ccx_elset['ccx_elset'] = mat_data['FEMElements']
ccx_elset['ccx_elset_name'] = get_ccx_elset_beam_name(mat_obj.Name, beamsec_obj.Name, mat_data['ShortName'])
ccx_elset['mat_obj_name'] = mat_obj.Name
ccx_elset['ccx_mat_name'] = mat_obj.Material['Name'][:80]
self.ccx_elsets.append(ccx_elset)
def get_ccx_elsets_multiple_mat_single_shell(self):
shellth_obj = self.shellthickness_objects[0]['Object']
self.get_femelement_sets(self.material_objects)
for mat_data in self.material_objects:
mat_obj = mat_data['Object']
ccx_elset = {}
ccx_elset['shellthickness_obj'] = shellth_obj
ccx_elset['ccx_elset'] = mat_data['FEMElements']
ccx_elset['ccx_elset_name'] = get_ccx_elset_shell_name(mat_obj.Name, shellth_obj.Name, mat_data['ShortName'])
ccx_elset['mat_obj_name'] = mat_obj.Name
ccx_elset['ccx_mat_name'] = mat_obj.Material['Name'][:80]
self.ccx_elsets.append(ccx_elset)
def get_ccx_elsets_multiple_mat_solid(self):
self.get_femelement_sets(self.material_objects)
for mat_data in self.material_objects:
mat_obj = mat_data['Object']
ccx_elset = {}
ccx_elset['ccx_elset'] = mat_data['FEMElements']
ccx_elset['ccx_elset_name'] = get_ccx_elset_solid_name(mat_obj.Name, None, mat_data['ShortName'])
ccx_elset['mat_obj_name'] = mat_obj.Name
ccx_elset['ccx_mat_name'] = mat_obj.Material['Name'][:80]
self.ccx_elsets.append(ccx_elset)
def get_ccx_elsets_multiple_mat_multiple_beam(self):
self.get_femelement_sets(self.beamsection_objects)
self.get_femelement_sets(self.material_objects)
for beamsec_data in self.beamsection_objects:
beamsec_obj = beamsec_data['Object']
for mat_data in self.material_objects:
mat_obj = mat_data['Object']
ccx_elset = {}
ccx_elset['beamsection_obj'] = beamsec_obj
elemids = []
for elemid in beamsec_data['FEMElements']:
if elemid in mat_data['FEMElements']:
elemids.append(elemid)
ccx_elset['ccx_elset'] = elemids
ccx_elset['ccx_elset_name'] = get_ccx_elset_beam_name(mat_obj.Name, beamsec_obj.Name, mat_data['ShortName'], beamsec_data['ShortName'])
ccx_elset['mat_obj_name'] = mat_obj.Name
ccx_elset['ccx_mat_name'] = mat_obj.Material['Name'][:80]
self.ccx_elsets.append(ccx_elset)
def get_ccx_elsets_multiple_mat_multiple_shell(self):
self.get_femelement_sets(self.shellthickness_objects)
self.get_femelement_sets(self.material_objects)
for shellth_data in self.shellthickness_objects:
shellth_obj = shellth_data['Object']
for mat_data in self.material_objects:
mat_obj = mat_data['Object']
ccx_elset = {}
ccx_elset['shellthickness_obj'] = shellth_obj
elemids = []
for elemid in shellth_data['FEMElements']:
if elemid in mat_data['FEMElements']:
elemids.append(elemid)
ccx_elset['ccx_elset'] = elemids
ccx_elset['ccx_elset_name'] = get_ccx_elset_shell_name(mat_obj.Name, shellth_obj.Name, mat_data['ShortName'], shellth_data['ShortName'])
ccx_elset['mat_obj_name'] = mat_obj.Name
ccx_elset['ccx_mat_name'] = mat_obj.Material['Name'][:80]
self.ccx_elsets.append(ccx_elset)
def get_femelement_sets(self, fem_objects):
# get femelements for reference shapes of each obj.References
if not hasattr(self, 'fem_element_table'):
self.fem_element_table = getFemElementTable(self.mesh_object.FemMesh)
count_femelements = 0
referenced_femelements = []
has_remaining_femelements = None
for fem_object_i, fem_object in enumerate(fem_objects):
obj = fem_object['Object']
fem_object['ShortName'] = get_ccx_elset_short_name(obj, fem_object_i) # unique short ccx_identifier
if obj.References:
ref_shape_femelements = []
for ref in obj.References:
femnodes = []
femelements = []
r = ref[0].Shape.getElement(ref[1])
# print(' ReferenceShape : ', r.ShapeType, ', ', ref[0].Name, ', ', ref[0].Label, ' --> ', ref[1])
if r.ShapeType == 'Edge':
femnodes = self.mesh_object.FemMesh.getNodesByEdge(r)
elif r.ShapeType == 'Face':
femnodes = self.mesh_object.FemMesh.getNodesByFace(r)
elif r.ShapeType == 'Solid':
# femnodes = self.mesh_object.FemMesh.getNodesBySolid(r) --> TODO
FreeCAD.Console.PrintError('Solid Reference Shapes, CalculiX input file may be broken!\n')
fem_object['FEMElements'] = self.ccx_eall
return
else:
print(' No Edge, Face or Solid as reference shapes!')
femelements = getFemElementsByNodes(self.fem_element_table, femnodes)
ref_shape_femelements += femelements
referenced_femelements += femelements
count_femelements += len(femelements)
fem_object['FEMElements'] = ref_shape_femelements
else:
has_remaining_femelements = obj.Name
# get remaining femelements for the fem_objects
if has_remaining_femelements:
remaining_femelements = []
for elemid in self.fem_element_table:
if elemid not in referenced_femelements:
remaining_femelements.append(elemid)
count_femelements += len(remaining_femelements)
for fem_object in fem_objects:
obj = fem_object['Object']
if obj.Name == has_remaining_femelements:
fem_object['FEMElements'] = sorted(remaining_femelements)
# check if all worked out well
if not femelements_count_ok(self.fem_element_table, count_femelements):
FreeCAD.Console.PrintError('Error in get_femelement_sets -- > femelements_count_ok failed!\n')
def get_refedge_node_table(self, refedge):
edge_table = {} # { meshedgeID : ( nodeID, ... , nodeID ) }
refedge_nodes = self.mesh_object.FemMesh.getNodesByEdge(refedge)
if is_solid_mesh(self.mesh_object.FemMesh):
refedge_fem_volumeelements = []
# if at least two nodes of a femvolumeelement are in refedge_nodes the volume is added to refedge_fem_volumeelements
for elem in self.fem_element_table:
nodecount = 0
for node in self.fem_element_table[elem]:
if node in refedge_nodes:
nodecount += 1
if nodecount > 1:
refedge_fem_volumeelements.append(elem)
# for every refedge_fem_volumeelement look which of his nodes is in refedge_nodes --> add all these nodes to edge_table
for elem in refedge_fem_volumeelements:
fe_refedge_nodes = []
for node in self.fem_element_table[elem]:
if node in refedge_nodes:
fe_refedge_nodes.append(node)
edge_table[elem] = fe_refedge_nodes # { volumeID : ( edgenodeID, ... , edgenodeID )} # only the refedge nodes
# FIXME duplicate_mesh_elements: as soon as contact ans springs are supported the user should decide on which edge the load is applied
edge_table = delete_duplicate_mesh_elements(edge_table)
elif is_shell_mesh(self.mesh_object.FemMesh):
refedge_fem_faceelements = []
# if at least two nodes of a femfaceelement are in refedge_nodes the volume is added to refedge_fem_volumeelements
for elem in self.fem_element_table:
nodecount = 0
for node in self.fem_element_table[elem]:
if node in refedge_nodes:
nodecount += 1
if nodecount > 1:
refedge_fem_faceelements.append(elem)
# for every refedge_fem_faceelement look which of his nodes is in refedge_nodes --> add all these nodes to edge_table
for elem in refedge_fem_faceelements:
fe_refedge_nodes = []
for node in self.fem_element_table[elem]:
if node in refedge_nodes:
fe_refedge_nodes.append(node)
edge_table[elem] = fe_refedge_nodes # { faceID : ( edgenodeID, ... , edgenodeID )} # only the refedge nodes
# FIXME duplicate_mesh_elements: as soon as contact ans springs are supported the user should decide on which edge the load is applied
edge_table = delete_duplicate_mesh_elements(edge_table)
elif is_beam_mesh(self.mesh_object.FemMesh):
refedge_fem_edgeelements = getFemElementsByNodes(self.fem_element_table, refedge_nodes)
for elem in refedge_fem_edgeelements:
edge_table[elem] = self.fem_element_table[elem] # { edgeID : ( nodeID, ... , nodeID )} # all nodes off this femedgeelement
return edge_table
def get_ref_face_node_table(self, ref_face):
face_table = {} # { meshfaceID : ( nodeID, ... , nodeID ) }
if is_solid_mesh(self.mesh_object.FemMesh):
if has_no_face_data(self.mesh_object.FemMesh):
# there is no face data, the volumeID is used as key { volumeID : ( facenodeID, ... , facenodeID ) } only the ref_face nodes
ref_face_volume_elements = self.mesh_object.FemMesh.getccxVolumesByFace(ref_face) # list of tupels (mv, ccx_face_nr)
ref_face_nodes = self.mesh_object.FemMesh.getNodesByFace(ref_face)
for ve in ref_face_volume_elements:
veID = ve[0]
ve_ref_face_nodes = []
for nodeID in self.fem_element_table[veID]:
if nodeID in ref_face_nodes:
ve_ref_face_nodes.append(nodeID)
face_table[veID] = ve_ref_face_nodes # { volumeID : ( facenodeID, ... , facenodeID ) } only the ref_face nodes
else: # the femmesh has face_data
volume_faces = self.mesh_object.FemMesh.getVolumesByFace(ref_face) # (mv, mf)
for mv, mf in volume_faces:
face_table[mf] = self.mesh_object.FemMesh.getElementNodes(mf)
elif is_shell_mesh(self.mesh_object.FemMesh):
ref_face_nodes = self.mesh_object.FemMesh.getNodesByFace(ref_face)
ref_face_elements = getFemElementsByNodes(self.fem_element_table, ref_face_nodes)
for mf in ref_face_elements:
face_table[mf] = self.fem_element_table[mf]
return face_table
def get_refedge_node_lengths(self, edge_table):
# calulate the appropriate node_length for every node of every mesh edge (me)
# G. Lakshmi Narasaiah, Finite Element Analysis, p206ff
# [ (nodeID, length), ... , (nodeID, length) ] some nodes will have more than one entry
node_length_table = []
mesh_edge_length = 0
# print(len(edge_table))
for me in edge_table:
if len(edge_table[me]) == 2: # 2 node mesh edge
# end_node_length = mesh_edge_length / 2
# ______
# P1 P2
P1 = self.mesh_object.FemMesh.Nodes[edge_table[me][0]]
P2 = self.mesh_object.FemMesh.Nodes[edge_table[me][1]]
edge_vec = P2 - P1
mesh_edge_length = edge_vec.Length
# print(mesh_edge_length)
end_node_length = mesh_edge_length / 2.0
node_length_table.append((edge_table[me][0], end_node_length))
node_length_table.append((edge_table[me][1], end_node_length))
elif len(edge_table[me]) == 3: # 3 node mesh edge
# end_node_length = mesh_edge_length / 6
# middle_node_length = mesh_face_area * 2 / 3
# _______ _______
# P1 P3 P2
P1 = self.mesh_object.FemMesh.Nodes[edge_table[me][0]]
P2 = self.mesh_object.FemMesh.Nodes[edge_table[me][1]]
P3 = self.mesh_object.FemMesh.Nodes[edge_table[me][2]]
edge_vec1 = P3 - P1
edge_vec2 = P2 - P3
mesh_edge_length = edge_vec1.Length + edge_vec2.Length
# print(me, ' --> ', mesh_edge_length)
end_node_length = mesh_edge_length / 6.0
middle_node_length = mesh_edge_length * 2.0 / 3.0
node_length_table.append((edge_table[me][0], end_node_length))
node_length_table.append((edge_table[me][1], end_node_length))
node_length_table.append((edge_table[me][2], middle_node_length))
return node_length_table
def get_ref_face_node_areas(self, face_table):
# calulate the appropriate node_areas for every node of every mesh face (mf)
# G. Lakshmi Narasaiah, Finite Element Analysis, p206ff
# FIXME only gives exact results in case of a real triangle. If for S6 or C3D10 elements
# the midnodes are not on the line between the end nodes the area will not be a triangle
# see http://forum.freecadweb.org/viewtopic.php?f=18&t=10939&start=40#p91355 and ff
# [ (nodeID,Area), ... , (nodeID,Area) ] some nodes will have more than one entry
node_area_table = []
mesh_face_area = 0
for mf in face_table:
if len(face_table[mf]) == 3: # 3 node mesh face triangle
# corner_node_area = mesh_face_area / 3.0
# P3
# /\
# / \
# /____\
# P1 P2
P1 = self.mesh_object.FemMesh.Nodes[face_table[mf][0]]
P2 = self.mesh_object.FemMesh.Nodes[face_table[mf][1]]
P3 = self.mesh_object.FemMesh.Nodes[face_table[mf][2]]
mesh_face_area = getTriangleArea(P1, P2, P3)
corner_node_area = mesh_face_area / 3.0
node_area_table.append((face_table[mf][0], corner_node_area))
node_area_table.append((face_table[mf][1], corner_node_area))
node_area_table.append((face_table[mf][2], corner_node_area))
elif len(face_table[mf]) == 4: # 4 node mesh face quad
FreeCAD.Console.PrintError('Face load on 4 node quad faces are not supported\n')
elif len(face_table[mf]) == 6: # 6 node mesh face triangle
# corner_node_area = 0
# middle_node_area = mesh_face_area / 3.0
# P3
# /\
# /t3\
# / \
# P6------P5
# / \ t4 / \
# /t1 \ /t2 \
# /_____\/_____\
# P1 P4 P2
P1 = self.mesh_object.FemMesh.Nodes[face_table[mf][0]]
P2 = self.mesh_object.FemMesh.Nodes[face_table[mf][1]]
P3 = self.mesh_object.FemMesh.Nodes[face_table[mf][2]]
P4 = self.mesh_object.FemMesh.Nodes[face_table[mf][3]]
P5 = self.mesh_object.FemMesh.Nodes[face_table[mf][4]]
P6 = self.mesh_object.FemMesh.Nodes[face_table[mf][5]]
mesh_face_t1_area = getTriangleArea(P1, P4, P6)
mesh_face_t2_area = getTriangleArea(P2, P5, P4)
mesh_face_t3_area = getTriangleArea(P3, P6, P5)
mesh_face_t4_area = getTriangleArea(P4, P5, P6)
mesh_face_area = mesh_face_t1_area + mesh_face_t2_area + mesh_face_t3_area + mesh_face_t4_area
middle_node_area = mesh_face_area / 3.0
node_area_table.append((face_table[mf][0], 0))
node_area_table.append((face_table[mf][1], 0))
node_area_table.append((face_table[mf][2], 0))
node_area_table.append((face_table[mf][3], middle_node_area))
node_area_table.append((face_table[mf][4], middle_node_area))
node_area_table.append((face_table[mf][5], middle_node_area))
elif len(face_table[mf]) == 8: # 8 node mesh face quad
FreeCAD.Console.PrintError('Face load on 8 node quad faces are not supported\n')
return node_area_table
def get_ref_shape_node_sum_geom_table(self, node_geom_table):
# shape could be Edge or Face, geom could be lenght or area
# summ of legth or area for each node of the ref_shape
node_sum_geom_table = {}
for n, A in node_geom_table:
# print(n, ' --> ', A)
if n in node_sum_geom_table:
node_sum_geom_table[n] = node_sum_geom_table[n] + A
else:
node_sum_geom_table[n] = A
return node_sum_geom_table
# Helpers
def getTriangleArea(P1, P2, P3):
vec1 = P2 - P1
vec2 = P3 - P1
vec3 = vec1.cross(vec2)
return 0.5 * vec3.Length
def getFemElementTable(fem_mesh):
""" getFemElementTable(fem_mesh): { elementid : [ nodeid, nodeid, ... , nodeid ] }"""
fem_element_table = {}
if is_solid_mesh(fem_mesh):
for i in fem_mesh.Volumes:
fem_element_table[i] = fem_mesh.getElementNodes(i)
elif is_shell_mesh(fem_mesh):
for i in fem_mesh.Faces:
fem_element_table[i] = fem_mesh.getElementNodes(i)
elif is_beam_mesh(fem_mesh):
for i in fem_mesh.Edges:
fem_element_table[i] = fem_mesh.getElementNodes(i)
else:
FreeCAD.Console.PrintError('Neither solid nor shell nor beam mesh!\n')
return fem_element_table
def getFemElementsByNodes(fem_element_table, node_list):
'''for every fem_element of fem_element_table
if all nodes of the fem_element are in node_list,
the fem_element is added to the list which is returned
e: elementlist
nodes: nodelist '''
e = [] # elementlist
for elementID in sorted(fem_element_table):
nodecount = 0
for nodeID in fem_element_table[elementID]:
if nodeID in node_list:
nodecount = nodecount + 1
if nodecount == len(fem_element_table[elementID]): # all nodes of the element are in the node_list!
e.append(elementID)
return e
def is_solid_mesh(fem_mesh):
if fem_mesh.VolumeCount > 0: # solid mesh
return True
def has_no_face_data(fem_mesh):
if fem_mesh.FaceCount == 0: # mesh has no face data, could be a beam mesh or a solid mesh without face data
return True
def is_shell_mesh(fem_mesh):
if fem_mesh.VolumeCount == 0 and fem_mesh.FaceCount > 0: # shell mesh
return True
def is_beam_mesh(fem_mesh):
if fem_mesh.VolumeCount == 0 and fem_mesh.FaceCount == 0 and fem_mesh.EdgeCount > 0: # beam mesh
return True
def femelements_count_ok(fem_element_table, count_femelements):
if count_femelements == len(fem_element_table):
# print('Count Elements written to CalculiX file: ', count_femelements)
# print('Count Elements of the FreeCAD FEM Mesh: ', len(fem_element_table))
return True
else:
print('ERROR: self.fem_element_table != count_femelements')
print('Count Elements written to CalculiX file: ', count_femelements)
print('Count Elements of the FreeCAD FEM Mesh: ', len(fem_element_table))
return False
def delete_duplicate_mesh_elements(refelement_table):
new_refelement_table = {} # duplicates deleted
for elem, nodes in refelement_table.items():
if sorted(nodes) not in sortlistoflistvalues(new_refelement_table.values()):
new_refelement_table[elem] = nodes
return new_refelement_table
def sortlistoflistvalues(listoflists):
new_list = []
for l in listoflists:
new_list.append(sorted(l))
return new_list
def get_ccx_elset_beam_name(mat_name, beamsec_name, mat_short_name=None, beamsec_short_name=None):
if not mat_short_name:
mat_short_name = 'Mat0'
if not beamsec_short_name:
beamsec_short_name = 'Beam0'
if len(mat_name + beamsec_name) > 20: # max identifier lenght in CalculiX for beam elsets
return mat_short_name + beamsec_short_name
else:
return mat_name + beamsec_name
def get_ccx_elset_shell_name(mat_name, shellth_name, mat_short_name=None, shellth_short_name=None):
if not mat_short_name:
mat_short_name = 'Mat0'
if not shellth_short_name:
shellth_short_name = 'Shell0'
if len(mat_name + shellth_name) > 80: # standard max identifier lenght in CalculiX
return mat_short_name + shellth_short_name
else:
return mat_name + shellth_name