-
Notifications
You must be signed in to change notification settings - Fork 3
/
81fbi.py
302 lines (254 loc) · 10.2 KB
/
81fbi.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
# Two fuel bricks normal contact restitution test
import os
import sys
import math
import gzip
import numpy
import time
import modred
import pickle
import commands
from math import cos
if modred.__version__[0] != '1':
print 'modred version 1 is needed!'
sys.exit(1)
def where(program):
for path in os.environ["PATH"].split(os.pathsep):
if os.path.exists(os.path.join(path, program)):
return path
return None
path = where('solfec')
if path == None:
print 'ERROR: solfec not found in PATH!'
print ' Download and compile solfec; add solfec directory to PATH variable;'
sys.exit(1)
print '(Found solfec at:', path + ')'
sys.path.append(os.path.join (path, 'scripts'))
from abaqusreader import AbaqusInput
dirpath = os.path.dirname(os.path.realpath(__file__))
sys.path.append(dirpath)
# User paramters
argv = NON_SOLFEC_ARGV()
formu = 'BC'
fbmod = 24
afile = 'examples/81array/81fbi.inp'
step = 1E-4
damp = 1E-7
impactVelocity = 0.15 #15cm/s
rest = 0.0
stop = 0.5
genbase = False
if argv == None or '-help' in argv:
print '---------------------------------------------------------------------'
print '81 fuel brick impact example parameters:'
print '---------------------------------------------------------------------'
print '-form name => where name is TL, BC, RO, MODAL, PR or RG (default: %s)' % formu
print '-fbmod num => fuel brick modes (default: %d)' % fbmod
print '-damp num => damping, >= 0.0 (default: %g)' % damp
print '-step num => time step, > 0.0 (default: %g)' % step
print '-afile path => ABAQUS fuel brick impact *.inp file path (default: %s)' % afile
print '-rest num => impact restitution, >= 0, <= 1 (default: %g)' % rest
print '-genbase => generate RO base (default: same as for 81array.py)'
print '-help => show this help and exit'
print '---------------------------------------------------------------------'
if argv != None:
for i in range (0, len(argv)):
if argv [i] == '-fbmod':
fbmod = max (long (argv [i+1]), 6)
elif argv [i] == '-form':
if argv [i+1] in ('TL', 'BC', 'RO', 'MODAL', 'PR', 'RG'):
formu = argv [i+1]
elif argv [i] == '-damp':
damp = max (float (argv [i+1]), 0.0)
elif argv [i] == '-step':
step = float (argv [i+1])
if step <= 0.0: step = 1E-4
elif argv [i] == '-afile':
afile = argv [i+1]
elif argv [i] == '-rest':
rest = max (min (1.0, float (argv [i+1])), 0.0)
elif argv [i] == '-genbase':
genbase = True
elif argv [i] == '-help':
sys.exit(0)
elif argv [i][0] == '-':
print 'INFO: invalid parameter: %s' % argv[i]
print ' try: -help'
sys.exit(0)
print 'ABAQUS file: %s'%afile
print 'formulation: %s'%formu
if formu in ['MODAL', 'RO']:
print '%d modes per fuel brick'%fbmod
print '%g damping'%damp
print '%g restitution'%rest
print '%g step'%step
if genbase and formu in ['TL', 'BC']:
print 'generating RO base enabled'
print '------------------------------------------------------'
# Model
if formu in ['RO', 'MODAL']:
ending = '%s_FB%d'%(formu, fbmod)
else: ending = formu
ending = '%s_%s_s%.1e_d%.1e_r%g'%(afile [afile.rfind ('/')+1:len(afile)].replace ('.inp',''), ending, step, damp, rest)
solfec = SOLFEC ('DYNAMIC', step, 'out/' + ending)
SURFACE_MATERIAL (solfec, model = 'SIGNORINI_COULOMB', friction = 0.1, restitution = rest)
# Create a new AbaqusInput object from the .inp deck:
model = AbaqusInput(afile, solfec)
# read RO bases once
arraybase = False
if formu == 'RO':
robase = {}
for label in ['FB1', 'FB2']:
path0 = solfec.outpath + '/' + label + '_base.pickle.gz'
try:
robase[label] = pickle.load(gzip.open(path0, 'rb'))
print 'RO --> using %s base' % path0
except:
print 'Reading %s failed --> you can run -form BC -genbase to genrate this file' % path0
path1 = afile.replace('fbi','array').replace ('.inp','_' + label + '_base.pickle.gz')
print 'Now trying to use %s instead ...' % path1
try:
robase[label] = pickle.load(gzip.open(path1, 'rb'))
arraybase = True
except:
print 'Reading %s failed --> run 81array.py -afile %s analysis in WRITE and READ modes first' % (path1, afile.replace('fbi', 'array'))
sys.exit(0)
if arraybase: # 81 array base is rotated by 45 deg around the (0, 0, 1) direction
for label in robase:
base = robase[label]
val0 = base[0]
vec0 = base[1]
vec1 = []
for i in range(0, len(vec0), 3):
x = (vec0[i], vec0[i+1], vec0[i+2])
y = ROTATE (x, (0, 0, 0), (0, 0, 1), -45)
vec1 += y
robase[label] = (val0, vec1) # POD base rotated by -45 deg about (0, 0, 1)
# Create a Finite Element body for each Instance in the Assembly:
for inst in model.assembly.instances.values(): # .instances is a dict
label = inst.name # use Abaqus instance name
mesh = inst.mesh # solfec MESH object at the instance position
bulkmat = inst.material # solfec BULK_MATERIAL object
if formu == 'RG':
bdy = BODY(solfec, 'RIGID', mesh, bulkmat, label)
elif formu == 'PR':
bdy = BODY(solfec, 'PSEUDO_RIGID', mesh, bulkmat, label)
elif formu in ['TL', 'BC']:
bdy = BODY(solfec, 'FINITE_ELEMENT', mesh, bulkmat, label, form = formu)
elif formu == 'MODAL':
bdy = BODY(solfec, 'FINITE_ELEMENT', COPY (mesh), bulkmat, label)
data = MODAL_ANALYSIS (bdy, fbmod, solfec.outpath + '/modal' + label, abstol = 1E-13)
DELETE (solfec, bdy)
bdy = BODY(solfec, 'FINITE_ELEMENT', mesh, bulkmat, label, form = 'BC-MODAL', base = data)
elif formu == 'RO':
bdy = BODY(solfec, 'FINITE_ELEMENT', mesh, bulkmat, label, form = 'BC-RO', base = robase[label[0:3]])
# boundary conditions
for b in solfec.bodies:
if b.kind != 'RIGID':
b.scheme = 'DEF_LIM'
b.damping = damp
c = b.center
t = b.tensor
print "body:" , b.mass
if b.label.startswith('FB'): # find FB
# vertical constraints
p1 = TRANSLATE (c, (-0.18985+0.005,0.0, 0.4535-0.005))
FIX_DIRECTION (b, p1, (0.0, 0.0, 1.0))
FIX_DIRECTION (b, p1, (0.0, 1.0, 0.0))
p2 = TRANSLATE (c, (0.18985-0.005, 0.0, 0.4535-0.005))
FIX_DIRECTION (b, p2, (0.0, 0.0, 1.0))
FIX_DIRECTION (b, p2, (0.0, 1.0, 0.0))
p3 = TRANSLATE (c, (-0.18985+0.005, 0.0, -0.4535+0.005))
FIX_DIRECTION (b, p3, (0.0, 1.0, 0.0))
p4 = TRANSLATE (c, (0.18985-0.005, 0.0, -0.4535+0.005))
FIX_DIRECTION (b, p4, (0.0, 1.0, 0.0))
#ASSIGN INPUT VELOCITY
if b.label.startswith('FB1(0)(0)'):
INITIAL_VELOCITY (b, (impactVelocity/2.0, 0.0, 0.0),(0.0, 0.0, 0.0))
elif b.label.startswith('FB2(0)(0)'):
INITIAL_VELOCITY (b, (0.0-(impactVelocity/2.0), 0.0, 0.0),(0.0, 0.0, 0.0))
if not VIEWER() and solfec.mode == 'READ':
b1 = None
b2 = None
for b in solfec.bodies:
if b.label.startswith('FB'):
if b.label.endswith('1(0)(0)'):
b1 = b
c1 = b.center
elif b.label.endswith('2(0)(0)'):
b2 = b
c2 = b.center
p1 = TRANSLATE (c1, (0.0,-0.18985+0.005, 0.0))
p2 = TRANSLATE (c1, (0.0, 0.18985-0.005, 0.0))
p3 = TRANSLATE (c2, (0.0,-0.18985+0.005, 0.0))
p4 = TRANSLATE (c2, (0.0, 0.18985-0.005, 0.0))
th = HISTORY(solfec,[(b1,p1,'VX'), (b1,p2,'VX'),(b2,p3,'VX'),(b2,p4,'VX')],0.0,stop,1)
res_vel_temp = zip(th[3], th[1])
res_vel = [r1-r2 for r1,r2 in res_vel_temp]
vrest = []
for v in res_vel:
vrest.append(v/impactVelocity)
print "For FB damping =", b.damping, " coeficient of restitution = ", vrest[-1]
try:
import matplotlib.pyplot as plt
plt.plot (th[0],th[1],lw = 2, label = 'Left_Brick_Top_Point_Velocity_VX_(m/s)')
plt.plot (th[0],th[2],lw = 2, label = 'Left_Brick_Bottom_Point_Velocity_VX_(m/s)')
plt.plot (th[0],th[3],lw = 2, label = 'Right_Brick_Top_Point_Velocity_VX_(m/s)')
plt.plot (th[0],th[4],lw = 2, label = 'Right_Brick_Bottom_Point_Velocity_VX_(m/s)')
plt.plot (th[0],vrest,lw = 2, label = 'Brick_Restitution')
plt.legend(loc = 'lower right')
plt.title ('SUB02 FB-FB Normal Contact FB damping=%s'% b.damping)
plt.savefig (solfec.outpath + '/Brick_Velocity_Damp%g.png'% b.damping)
except ImportError:
pass # no reaction
# solver and run
GEOMETRIC_EPSILON (1E-6)
slv = NEWTON_SOLVER() #All default values used
OUTPUT(solfec, 1E-3)
# sample displacements
if formu in ['TL', 'BC'] and genbase:
fb1 = BYLABEL (solfec, 'BODY', 'FB1(0)(0)')
fb2 = BYLABEL (solfec, 'BODY', 'FB2(0)(0)')
fb1_defo = COROTATED_DISPLACEMENTS (solfec, 'FB1(0)(0)')
fb2_defo = COROTATED_DISPLACEMENTS (solfec, 'FB2(0)(0)')
fb1_rig = RIGID_DISPLACEMENTS (fb1)
fb2_rig = RIGID_DISPLACEMENTS (fb2)
if RANK() == 0 and solfec.mode == 'WRITE':
print 'Running', stop, 'seconds of analysis with step', step, '...'
t0 = time.time()
if solfec.mode <> 'READ':
RUN (solfec, slv, stop)
elapsed = time.time() - t0
if RANK() == 0 and solfec.mode == 'WRITE':
print "analysis run time =", elapsed, "seconds"
if solfec.mode == 'READ' and formu in ['TL', 'BC'] and genbase:
from sys import stdout
print 'Sampling FEM displacements ...', ' ' ,
SEEK (solfec, 0.0)
while solfec.time < stop:
FORWARD (solfec, 1, corotated_displacements='TRUE')
print '\b\b\b\b\b%2d %%' % (100*solfec.time/stop),
stdout.flush ()
print
if formu in ['TL', 'BC'] and genbase:
pod_input = [(fb1_rig, fb1_defo, 'FB1', fbmod),
(fb2_rig, fb2_defo, 'FB2', fbmod)]
for (rig, defo, label, num_modes) in pod_input:
vecs = numpy.transpose(numpy.array(rig+defo))
svec = vecs.shape[0]
nvec = vecs.shape[1]
print '%s:' % label, 'calculating', num_modes, 'POD modes from', nvec, 'input vectors of size', svec, '...'
try:
modes, vals = modred.compute_POD_matrices_snaps_method(vecs, list(range(num_modes)))
except:
print 'POD generation has failed --> it is possible that you tried to extract too many modes'
print ' try using [-fbmod a_smaller_number] and re-run'
sys.exit ()
mod = numpy.transpose(modes).tolist()
val = vals.tolist()
basevec = [x for vec in mod for x in vec]
podbase = (val[0:len(mod)], basevec)
try: os.makedirs(solfec.outpath.replace(formu,'RO_FB%d'%fbmod))
except: pass
path = solfec.outpath.replace(formu,'RO_FB%d'%fbmod) + '/' + label + '_base.pickle.gz'
pickle.dump (podbase, gzip.open(path,'wb'))