Menu

Discussion Forum

New Discussion
查找

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.

Eigenfrequency on Thermo-Solid Coupling

Posted 2021年11月8日 GMT-5 21:06 Structural Mechanics Version 5.6 0 Replies

zhaoxiang du
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Dear Comsol Community,

I am simulating the eigenfrequency of a MEMS device. In the case of only solid mechanical field, I can find the eigenfrequency well(13384Hz,13749Hz,17516Hz,...).When I coupled heat transfer field and mechanical field, no heat source was added(The initial temperature values of all domains remain the same).Theoretically, the eigenfrequency should not change because there is no thermal stress and thermal expansion(Material parameters are constants).The eigenfrequency obtained by coupling is (-1.0069e-15i, 0.012144i, 0.014457i,...). The mode shape after coupling is also very strange.

I am confused about the simulation results have a large mismatch with the theory results.

Thanks.

Kind Regards.

-Zhaoxiang

0 Replies Last Post 2021年11月8日 GMT-5 21:06
COMSOL Moderator

Hello zhaoxiang du

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.

Suggested Content