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 The information provided may be out of date.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.

Electrostatic Actuation of Cantilever beam

Posted Mar 4, 2014, 9:13 a.m. EST MEMS & Nanotechnology, MEMS & Piezoelectric Devices Version 4.3a 1 Reply

Shahid Saghir
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

I,m trying to do the tutorial electrostatic actuation of cantilever beam, although i have followed exactly all the instructions but I receive the following error message. (I also checked all the physics setting and every thing against the already built model in the models/sensors folder)

here is the error message

Failed to find a solution for the initial parameter.
Segregated group 3

Singular matrix.

There are 400 void equations (empty rows in matrix) for the variable mod1.V.
at coordinates: (0,0,1e-006), (0,9.68925e-007,1e-006), (0,1.93785e-006,1e-006), (0,2.95474e-006,1e-006), (0,3.97164e-006,1e-006), ...
and similarly for the degrees of freedom (empty columns in matrix).
Returned solution is not converged.
1 Reply Last Post Jul 16, 2014, 1:47 a.m. EDT
COMSOL Moderator

Hello Shahid Saghir

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.

Sumathi Ayyalusamy
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 10 years ago Jul 16, 2014, 1:47 a.m. EDT
Hai just check with the parameters under global definitions..
Hai just check with the parameters under global definitions..

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