Stiffness and Mass Matrix Record

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romaniitd
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Stiffness and Mass Matrix Record

Post by romaniitd »

I tried to record stiffness and mass matrix for a 2D frame frame from my model. But I am not able to find out, Please help regarding this matter.
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fmk
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Re: Stiffness and Mass Matrix Record

Post by fmk »

you can obtain the stiffness matrix using a printA method and a full system of equations in a staic analysis. using a model without rayleigh damping you could also obtain the matrix, and knowing dt, you could obtain the mass matrix by calculation using the same apporach.

http://opensees.berkeley.edu/wiki/index ... tA_Command
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