Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

Global Stiffness Matrix

Please login with a confirmed email address before reporting spam

Hi all,

I have two rigid foundationsm let's call them m1 and m2. This foundations are connected to each other, as well as to a fixed point using Spring-Damper node (3x3 matrix). Hence, the global matrix that is produced by such system is the following:

.

Where each coefficient K is 3x3 matrix.

However, for some specific reasons I need this global matrix to be in the form of:

In other words, I need transposed matrix to be on the off-diagonal place (I do not care what happenes to the diagonal terms).

As am I am new to COMSOL software, I was wondering if there is a way to achieve this? I have tried my luck with using nonlocali couplings, using data from point probe to alter stiffness of the element instead of adding a coupling spring, but due to my lack of knowledge, I cannot achieve this.

Has anyone had the similar experience?

Thank you all for your help

Irakli


0 Replies Last Post Mar 8, 2024, 8:46 a.m. EST
COMSOL Moderator

Hello Irakli Ambokadze

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.