[CIG-SHORT] heterogeneity of fault friction

[Farrokh Sheibani]

Dear Pylith developers,

I am trying to model nonuniform distribution of fault friction parameters. The cult constitutive modeling that I am using is Slip Weakening. I am receiving error. I attached the cfg file as well as friction spatial database file and also the error message.

I was wonderen if you would help me regarding this:


Thank you so much in advance!

Best,

Farrokh Sheibani


cfg File:

pylithapp.timedependent.interfaces]
NF1=pylith.faults.FaultCohesiveDyn
[pylithapp.timedependent.interfaces.NF1]
id=100
label = NF1
quadrature.cell = pylith.feassemble.FIATSimplex
quadrature.cell.dimension = 2
quadrature.cell.quad_order =4
#zero_tolerance = 1e-5

friction = pylith.friction.SlipWeakening
#friction.label = Slip weakening


#friction = pylith.friction.StaticFriction
friction.label = Slip weakening
friction.db_properties = spatialdata.spatialdb.SimpleDB
friction.db_properties.label = Slip weakening
friction.db_properties.filename = friction.spatialdb
friction.db_properties.query_type = linear



Friction Database File:




// -*- C++ -*- (tell Emacs to use C++ mode for syntax highlighting)
//
#SPATIAL.ascii 1
SimpleDB {
  num-values = 4 // number of friction components

  // names of the Slip Weakening components
  value-names =  static-coefficient dynamic-coefficient slip-weakening-parameter cohesion
  value-units =  none none m Pa// units

  num-locs = 2874//
  data-dim = 2
  space-dim = 3
  cs-data = cartesian {
    to-meters = 1.0
    space-dim = 3
  }
}
// Columns are
// (1) x coordinate (m)
// (2) y coordinate (m)
// (3) z coordinate (m)
// (4) static-coefficient (none)
// (5) dynamic-coefficient (none)
// (6) slip-weakening-parameter (m)
// (7) cohesion (Pa)
0.004356039    0.0004799379    0.008003221    0.66    0.5    0    1E-06    0

Error Message:

Traceback (most recent call last):
  File "/data1/farrokh/Pylith/bin/pylith", line 27, in <module>
    start(applicationClass=PyLithApp)
  File "/data1/farrokh/Pylith/lib/python2.7/site-packages/pythia-0.8.1.16-py2.7.egg/pyre/applications/__init__.py", line 41, in start
    shell.run(**kwds)
  File "/data1/farrokh/Pylith/lib/python2.7/site-packages/pythia-0.8.1.16-py2.7.egg/pyre/applications/Shell.py", line 125, in run
    app.applyConfiguration(context)
  File "/data1/farrokh/Pylith/lib/python2.7/site-packages/pythia-0.8.1.16-py2.7.egg/pyre/inventory/Configurable.py", line 84, in applyConfiguration
    raise ValueError("%s\nBacktrace - Component %s" % (err.message, aliases))
ValueError: Error while configuring spatial database reader (simpleioascii, iohandler):
Filename for spatial database not specified.
Backtrace - Component simpleioascii, iohandler
Backtrace - Component simpledb, db_properties
Backtrace - Component slipweakening, friction
Backtrace - Component faultcohesivedyn, NF1
Backtrace - Component interfaces
Backtrace - Component timedependent, problem
Backtrace - Component pylithapp

Farrokh Sheibani, PhD
Postdoctoral Research Associate
Department of Earth Atmospheric and Planetary Sciences; Earth Resources Laboratory
Massachusetts Institute of Technology






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