/[escript]/trunk/finley/test/python/slip_stress_old.py
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Contents of /trunk/finley/test/python/slip_stress_old.py

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Revision 884 - (show annotations)
Mon Oct 30 06:37:30 2006 UTC (13 years, 7 months ago) by gross
Original Path: trunk/finley/test/python/slip_stress.py
File MIME type: text/x-python
File size: 2660 byte(s)
simple mesh generator for slip_stress
1 # $Id$
2
3 """
4 calculation of the stress distribution around a fault from the slip on the fault
5
6 e.g. use slip_stress_mesh.py to generate mesh
7
8 @var __author__: name of author
9 @var __copyright__: copyrights
10 @var __license__: licence agreement
11 @var __url__: url entry point on documentation
12 @var __version__: version
13 @var __date__: date of the version
14 """
15
16 __author__="Lutz Gross, Louise Kettle"
17 __copyright__=""" Copyright (c) 2006 by ACcESS MNRF
18 http://www.access.edu.au
19 Primary Business: Queensland, Australia"""
20 __license__="""Licensed under the Open Software License version 3.0
21 http://www.opensource.org/licenses/osl-3.0.php"""
22 __url__="http://www.iservo.edu.au/esys"
23 __version__="$Revision$"
24 __date__="$Date$"
25
26 from esys.escript import *
27 from esys.escript.pdetools import SaddlePointProblem
28 from esys.escript.linearPDEs import LinearPDE
29 from esys.finley import ReadMesh
30
31
32 rho=0.
33 lam_lmbd=1.
34 lam_mu=1.
35 g=9.81
36
37 class SlippingFault(SaddlePointProblem):
38 """
39 simple example of saddle point problem
40 """
41 def __init__(self,domain):
42 super(SlippingFault, self).__init__(self)
43 self.domain=domain
44 self.__pde_u=LinearPDE(domain,numEquations=self.domain.getDim(),numSolutions=self.domain.getDim())
45 self.__pde_u.setSymmetryOn()
46
47 def initialize(self,density=1.,lmbd=1., mu=1., traction=Data(),fixed_u_mask=Data(), slip=0.):
48 d=self.domain.getDim()
49 self.slip=slip
50 A =self.__pde_u.createCoefficientOfGeneralPDE("A")
51 for i in range(self.domain.getDim()):
52 for j in range(self.domain.getDim()):
53 A[i,j,j,i] += mu
54 A[i,j,i,j] += mu
55 A[i,i,j,j] += lmbd
56 self.__pde_u.setValue(A=A,q=fixed_u_mask,Y=-kronecker(Function(self.domain))[d-1]*g*density,y=traction)
57
58 def inner(self,p0,p1):
59 return integrate(p0*p1,FunctionOnContactZero(self.domain))
60
61 def solve_f(self,u,p,tol=1.e-8):
62 self.__pde_u.setTolerance(tol)
63 self.__pde_u.setValue(y_contact=-p)
64 return self.__pde_u.getSolution()
65
66 def solve_g(self,u,tol=1.e-8):
67 dp=-(self.slip-jump(u))
68 return dp
69
70
71 s=numarray.array([0.,1.,1.])
72 dom=ReadMesh("meshfault3D.fly")
73 prop=SlippingFault(dom)
74 d=dom.getDim()
75 x=dom.getX()[d-1]
76 mask=whereZero(x-inf(x))*numarray.ones((d,))
77 u0=Vector(0.,Solution(dom))
78 p0=Vector(1.,FunctionOnContactZero(dom))
79 prop.initialize(fixed_u_mask=mask,slip=Data(s,FunctionOnContactZero(dom)), density=rho,lmbd=lam_lmbd, mu=lam_mu)
80 u,p=prop.solve(u0,p0,iter_max=50,tolerance=0.01)
81 saveVTK("dis.xml",u=u)
82 saveVTK("fault.xml",sigma=p,s=jump(u))

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