/
ccxInpWriter.py
778 lines (707 loc) · 39.7 KB
/
ccxInpWriter.py
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# ***************************************************************************
# * *
# * 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)
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()
if 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):
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:
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 = []
if 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')
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
# FIXME for loads on edges the node count is used to distribute the load on the edges.
# In case of a not uniform fem mesh this could result in wrong force distribution
# and thus in wrong analysis results. see def write_constraints_force()
f.write('** concentrated load [N] distributed on all mesh nodes of the given shapes\n')
f.write('** ' + str(frc_obj.Force) + ' N / ' + str(NbrForceNodes) + ' Nodes = ' + str(fobj['NodeLoad']) + ' N on each node\n')
if frc_obj.Force == 0:
print(' Warning --> Force = 0')
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))
if is_shell_mesh(self.mesh_object.FemMesh) or (is_solid_mesh(self.mesh_object.FemMesh) and has_no_face_data(self.mesh_object.FemMesh)):
if not hasattr(self, 'fem_element_table'):
self.fem_element_table = getFemElementTable(self.mesh_object.FemMesh)
for fobj in self.force_objects:
frc_obj = fobj['Object']
if 'NodeLoad' in fobj: # load on edges or vertieces
node_load = fobj['NodeLoad']
frc_obj_name = frc_obj.Name
vec = frc_obj.DirectionVector
f.write('*CLOAD\n')
f.write('** force: ' + str(node_load) + ' N, direction: ' + str(vec) + '\n')
v1 = "{:.13E}".format(vec.x * node_load)
v2 = "{:.13E}".format(vec.y * node_load)
v3 = "{:.13E}".format(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')
# area load on faces
sum_ref_face_area = 0
sum_ref_face_node_area = 0
sum_node_load = 0
for o, elem in frc_obj.References:
elem_o = o.Shape.getElement(elem)
if elem_o.ShapeType == 'Face':
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)
if elem_o.ShapeType == 'Face':
ref_face = elem_o
f.write('** ' + frc_obj.Name + '\n')
f.write('*CLOAD\n')
f.write('** node loads on element face: ' + o.Name + '.' + elem + '\n')
face_table = {} # { meshfaceID : ( nodeID, ... , nodeID ) }
if is_solid_mesh(self.mesh_object.FemMesh):
if has_no_face_data(self.mesh_object.FemMesh):
ref_face_volume_elements = self.mesh_object.FemMesh.getccxVolumesByFace(ref_face) # list of tupels
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 ) }
else:
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]
# 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 = []
# { nodeID : Area, ... , nodeID:Area } AreaSum for each node, one entry for each node
node_sumarea_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')
# node_sumarea_table
for n, A in node_area_table:
# print(n, ' --> ', A)
if n in node_sumarea_table:
node_sumarea_table[n] = node_sumarea_table[n] + A
else:
node_sumarea_table[n] = A
sum_node_areas = 0
for n in node_sumarea_table:
sum_node_areas = sum_node_areas + node_sumarea_table[n]
sum_ref_face_node_area += sum_node_areas
# write CLOAD lines to CalculiX file
vec = frc_obj.DirectionVector
for n in sorted(node_sumarea_table):
node_load = node_sumarea_table[n] * force_per_sum_ref_face_area
sum_node_load += node_load
if (vec.x != 0.0):
v1 = "{:.13E}".format(vec.x * node_load)
f.write(str(n) + ',1,' + v1 + '\n')
if (vec.y != 0.0):
v2 = "{:.13E}".format(vec.y * node_load)
f.write(str(n) + ',2,' + v2 + '\n')
if (vec.z != 0.0):
v3 = "{:.13E}".format(vec.z * node_load)
f.write(str(n) + ',3,' + v3 + '\n')
f.write('\n')
f.write('\n')
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')
# 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):
'''if all nodes of an 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 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
def get_ccx_elset_solid_name(mat_name, solid_name=None, mat_short_name=None):
if not solid_name:
solid_name = 'Solid'
if not mat_short_name:
mat_short_name = 'Mat0'
if len(mat_name + solid_name) > 80: # standard max identifier lenght in CalculiX
return mat_short_name + solid_name
else:
return mat_name + solid_name
def get_ccx_elset_short_name(obj, i):
if hasattr(obj, "Proxy") and obj.Proxy.Type == 'MechanicalMaterial':
return 'Mat' + str(i)
elif hasattr(obj, "Proxy") and obj.Proxy.Type == 'FemBeamSection':
return 'Beam' + str(i)
elif hasattr(obj, "Proxy") and obj.Proxy.Type == 'FemShellThickness':
return 'Shell' + str(i)
else:
print 'Error: ', obj.Name, ' --> ', obj.Proxy.Type