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
|
#############################################################
## ##
## Copyright (c) 2003-2011 by The University of Queensland ##
## Earth Systems Science Computational Centre (ESSCC) ##
## http://www.uq.edu.au/esscc ##
## ##
## Primary Business: Brisbane, Queensland, Australia ##
## Licensed under the Open Software License version 3.0 ##
## http://www.opensource.org/licenses/osl-3.0.php ##
## ##
#############################################################
"""
Example simulation of compression of an elastically bonded block of
non-rotational spheres.
"""
from esys.lsm import *
from esys.lsm.util import Vec3, BoundingBox, InstallInfo
class Loading(Runnable):
"""
Loading mechanism which moves the walls.
"""
def __init__(self,lsm):
"""
Initialise loading object with a reference to an L{LsmMpi}
object.
@type lsm: L{esys.lsm.LsmMpi<esys.lsm.LsmPy.LsmMpi>}
@param lsm: Model object which will move the model wall.
"""
Runnable.__init__(self)
self.theLSM=lsm
def run(self):
"""
Moves walls in compressive fashion.
"""
self.theLSM.moveWallBy("lowerWall",Vec3(0.0,0.0001,0.0))
self.theLSM.moveWallBy("upperWall",Vec3(0.0,-0.0001,0.0))
def runSimulation():
"""
Runs a compression simulation on an elastic block.
Outputs wall-forces and wall-positions to file.
"""
setVerbosity(True)
mySim=LsmMpi(2,[0,0,0])
mySim.initVerletModel("NRotSphere", 2.5, 0.5)
mySim.setTimeStepSize(0.02)
mySim.setSpatialDomain(BoundingBox(Vec3(-5.0,0.0,-5.0),Vec3(15.0,10.0,15.0)))
mySim.readGeometry(
InstallInfo.getDataFilePath("cube10r0.2.geo")
);
# setup interactions
bip=NRotBondPrms(1,"bonded",1.0,1.05)
fip=NRotFrictionPrms("friction",1.0,0.6,1.0)
mySim.createInteractionGroup(bip)
mySim.createInteractionGroup(fip)
mySim.createExclusion("bonded","friction")
# wall parameters
mySim.createWall("lowerWall",Vec3(0.0,0.0,0.0),Vec3(0.0,1.0,0.0))
mySim.createWall("upperWall",Vec3(0.0,10.0,0.0),Vec3(0.0,-1.0,0.0))
wp1=NRotElasticWallPrms("upperWallInteraction","upperWall",1.0)
wp2=NRotElasticWallPrms("lowerWallInteraction","lowerWall",1.0)
# setup savers
mySim.createFieldSaver(
WallVectorFieldSaverPrms(
fileName="wf2.dat",
fieldName="Force",
wallName=["lowerWall","upperWall"],
fileFormat="RAW_SERIES",
beginTimeStep=0,
endTimeStep=10,
timeStepIncr=1
)
)
mySim.createFieldSaver(
WallVectorFieldSaverPrms(
fileName="wp2.dat",
fieldName="Position",
wallName=["lowerWall","upperWall"],
fileFormat="RAW_SERIES",
beginTimeStep=0,
endTimeStep=10,
timeStepIncr=1
)
)
# create walls
mySim.createInteractionGroup(wp1)
mySim.createInteractionGroup(wp2)
# add loading function
lf=Loading(mySim)
mySim.addPreTimeStepRunnable(lf)
mySim.setNumTimeSteps(10)
mySim.run()
if (__name__=="__main__"):
runSimulation()
|
