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Re: [SCIRUN-USERS] Stiffness Matrix Extraction


Chronological Thread 
  • From: David Weinstein <dmw@sci.utah.edu>
  • To: "Svendsen, Mark C" <msvendse@iupui.edu>
  • Cc: <scirun-users@sci.utah.edu>
  • Subject: Re: [SCIRUN-USERS] Stiffness Matrix Extraction
  • Date: Fri, 9 Sep 2005 15:04:20 -0600
Hi Mark,

The "TetVol2QuadraticTetVol" module (in SCIRun::FieldGeometry) is the one you should use to convert the linear tetrahedral model into a quadratic one. Also, you shouldn't use the SetupFEMatrix module at all -- you can just use the BuildFEMatrixQuadratic module instead. Here's the network that you want:

 

PNG image


Best,
Dave


On Sep 9, 2005, at 1:27 PM, Svendsen, Mark C wrote:

Hello

I am trying to extract the stiffness matrix from the low resolution mesh of the torso. I have the mesh.tvt.fld file being read in by the FieldReader. I have the FieldReader going to the SetupFEMatrix module and then both of these modules feeding into the BuildFEMatrixQuadratic module. I then have the BuildFEMatrixQuadratic feeding into the MatrixWriter module. I am getting an error that the field input to the BuildFEMatrixQuadratic has to be a TetVol type, not a TetVolField<int>. I have tried to convert the output from the FieldReader to a TetVol type, but with no luck.

Also, can I write the matrix to something other than a sparse matrix .mat file? How about a dense matrix .mat or something else?

Thank you very much.

Mark

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