Menu

Discussion Forum

New Discussion
Filter

Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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.

error at PZT Beam displacement with Stationary study

Posted Aug 24, 2011, 8:14 a.m. EDT Structural Mechanics Version 4.0 0 Replies

Shanshan Gu-Stoppel
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

I recently simulated a one-end-fixed PZT beam, which is composed of a pzt layer (800µm,200µm,1µm, upper) and a Si layer (800µm,200µm,5µm, beneath), to get its eigenfrequencies.

It worked and i chosed then the stationary study instead of the eigenfrequency study, in order to get a reasonable displacement, when voltage = 10V. But I get an error: failed to evaluate expression. Does any body know, what it means?

Following are the boundary conditions which i set:
piezoelectric material model: pzt-layer
linear elastic material model: Si-layer
ground: under boundary of the pzt-layer
electric potential: upper boundary of the pzt-layer (10 V)

as said, it worked for eigenfrequency study...

I'm thankful for any advice and discussion.

thanks a lot in advance
0 Replies Last Post Aug 24, 2011, 8:14 a.m. EDT
COMSOL Moderator

Hello Shanshan Gu-Stoppel

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