Dear SPECFEM2D developers,<br><br>
I am using SPECFEM2D for research and at this moment
I am trying to define a 2D VTI (transverse isotropy with a vertical
symmetry axis) model, and for that I need to specify a total of five
independent stiffness coefficients that describe this type of symmetry:
c11, c13, c33, c55 and c66; however, by reading the user's guide and then the Par_files, I
noticed that in the part of model definition when I try to specify an anisotropic model it is possible to introduce four out of the five
stiffness coefficients: c11, c13, c33, and c55, but it is not possible
to introduce c66 (responsible in part of the anisotropy of anti-plane SH waves). I can
obtain good results if I only consider the Ux and Uz displacement
components (P and SV waves) but it becomes an issue if I deal with the
Uy displacement component (SH waves). I know that SPECFEM2D is a 2D package, but even though I think I should be able to get anisotropy for SH waves if I,
for example, specify a seismic source by its seismic moment tensor
including the Myx and Myz components. <br><br>Perhaps to solve this problem I could use SPECFEM3D; however I think the modeling process would be very time consuming and I would like to avoid that,<br><br>Thank you in advance.<br>
<br>
Sincerely,<br>
<br>
Oscar Alberto Jarillo Michel, CSM/CWP.<br>