Stiffness and Mass Matrix Record

For posts concerning the documentation, errors, ommissions, general comments, etc.

Moderators: silvia, selimgunay, Moderators

Post Reply
romaniitd
Posts: 7
Joined: Fri Apr 03, 2015 1:30 am
Location: Indian Institute of Technology Tirupati (IIT Tp)

Stiffness and Mass Matrix Record

Post by romaniitd » Mon Nov 23, 2015 11:48 am

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.

fmk
Site Admin
Posts: 5883
Joined: Fri Jun 11, 2004 2:33 pm
Location: UC Berkeley
Contact:

Re: Stiffness and Mass Matrix Record

Post by fmk » Tue Nov 24, 2015 10:41 am

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

Post Reply