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 The information provided may be out of date.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

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 16 juil. 2014, 01:47 UTC−4
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.


Please login with a confirmed email address before reporting spam

Posted: 10 years ago 16 juil. 2014, 01:47 UTC−4
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.