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 The information provided may be out of date.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.

a transient beam problem

Please login with a confirmed email address before reporting spam

Hi everyone,

I am simulating a beam which is hinged at two ends. A time dependent force is acting on the beam and the beam is bending by the force. There are 3 dampers with damping coefficient b, and the force of the damper acting on the beam is b * vt (velocity in y direction). I need to get the displacement of the points on the beam. It is not a complex problem. And the model is attached.
I have solve this problem(solve the Euler beam equation) using numerical method with matlab and get the result. But the result that I get from Comsol is quite different( with the same parameters and coefficients). It is absolutely wrong, because the displacement I get in the comsol model is too large. Is there anyone who can help me have a look at my model? I have thought that for a long time.
The mph file is big, so I have to use google drive.
drive.google.com/file/d/0BzmhkxwNuOPmN1ZGQzRIaGV6X0E/edit?usp=sharing
Thanks sooooooo much! I will appreciate your help very much!


Best,


Ting

0 Replies Last Post Jun 17, 2014, 2:37 p.m. EDT
COMSOL Moderator

Hello Ting Zhou

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.