changing rayleigh command

[mouna]

Hi there;
I am trying to simulate a soil mixture with high damping but the Rayleigh damping formulation results in frequency dependent damping, in contrast to experiments that show that the damping of soil is mostly frequency independent. So I want to change the rayleigh command. Where do I find source code of this command? or Where I find C matrix (damping matrix), exactly?

Thanks.

[jayschub]

I know the rayleigh command can be extremely frustrating.

[fmk]

the rayleigh factors can be set using the rayleigh command SRC/tcl/commands.cpp and by specifying dufferent rayleigh factors for different regions,
both basically set the rayleigh factors in the elements, which are used to return the C matrix in the elements, most elements use the default implementation of getDamp() defined in SRC/element/Element.cpp