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#############################################################
## ##
## Copyright (c) 2003-2017 by The University of Queensland ##
## Centre for Geoscience Computing ##
## http://earth.uq.edu.au/centre-geoscience-computing ##
## ##
## Primary Business: Brisbane, Queensland, Australia ##
## Licensed under the Open Software License version 3.0 ##
## http://www.apache.org/licenses/LICENSE-2.0 ##
## ##
#############################################################
"""
Module for running a suite of bonded-block benchmark simulations.
Defines L{BondedBlockSim} class whose instances can be used to run a
single simple I{quivering} elastic block simulation.
"""
from __future__ import division
from esys.lsm import *
from esys.lsm.util import *
from esys.lsm.geometry import *
from esys.lsm.benchmarks import Util
import random
class BondedBlockSim(Util.BenchSim):
def __init__(
self,
numTimeSteps=10000,
numParticles=1000,
spawnExe = "",
spawnArgList = None
):
Util.BenchSim.__init__(
self,
numTimeSteps,
numParticles,
spawnExe,
spawnArgList
)
self.normalK = 1.0
self.radius = 1.0
self.verletDist = self.radius/2.0
self.logger.info("Initialising model")
timeStepSize = 0.0001
self.initVerletModel(
particleType = "NRotSphere",
gridSpacing = 4.0,
verletDist = self.verletDist
)
self.setTimeStepSize(dt=timeStepSize)
def getRandomOffset(self):
return Vec3([random.random() for i in range(0,3)])*(self.radius/20)
def createParticlesAndBonds(self):
"""
Creates a hexagonnaly close packed block of particles within
the model along with linear elastic bonds connecting neighbouring
particles.
"""
#
# Create a block of hcc particles.
#
blk = Util.getHexagBlock(self.numParticles, self.radius)
#
# Determine neighbouring particles
#
conns = DistConnections(0.01*self.radius, 0, blk)
#
# initialize RNG
#
random.seed(42)
#
# Perurb the initial positions of the particles.
#
for p in blk:
p.setPosn(p.getPosn() + self.getRandomOffset())
#
# Set up the spatial domain.
#
blkBox = blk.getParticleBBox()
domainBox = \
BoundingBox(
blkBox.getMinPt() - 2.0*self.radius,
blkBox.getMaxPt() + 2.0*self.radius
)
self.logger.info("Setting spatial domain.")
self.setSpatialDomain(domainBox)
#
# Create the model particles.
#
self.createParticles(blk)
#
# Create the linear elastic bonds between particles.
#
self.logger.info("Creating bonded interaction group...")
self.createConnections(conns)
self.createInteractionGroup(
NRotBondPrms(
tag=0,
name="bonds",
normalK=self.normalK,
breakDistance=self.radius*10.0
)
)
self.logger.info("Creating " + str(len(conns)) + " bonds...")
def runSimulation(self):
self.createParticlesAndBonds()
self.doTimedRun()
def runSimulations(
numTimeSteps,
numParticlesList,
outputFileName,
spawnCmdLineList,
verboseLsm
):
suite = Util.SimSuite(BondedBlockSim)
suite.createSims(
numTimeSteps,
numParticlesList,
outputFileName,
spawnCmdLineList,
verboseLsm
)
suite.runSimulations()
if (__name__ == "__main__"):
parser = Util.getOptionParser()
(options, argList) = parser.parse_args()
runSimulations(
options.numTimeSteps,
options.numParticlesList,
options.outputFileName,
options.spawnCmdLineList,
options.verboseLsm
)
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