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.
Nonlinear vibrating beam
Posted 13 dic 2015, 14:00 GMT-5 Version 5.0 1 Reply
Please login with a confirmed email address before reporting spam
Hi, I'm trying to model a cantilever beam base excitation, one end of the beam is fixed on the base, with the excitation of 0.5g and 5Hz, there is a nonlinear magnetic force applied on the tip mass which is simplified as third order polynomial ay^3+cy. y represents the displacement. My question is how to applied this nonlinear force, and which study I should use, eigenfrequency, frequency domain or time dependent? Thank you very much.
Attachments:
1 Reply Last Post 14 dic 2015, 02:18 GMT-5
Please login with a confirmed email address before reporting spam
Posted:
9 years ago
Hi,
Since the problem is nonlinear, your only option is to solve it as a time dependent problem, and run a large number of cycles until you get a stabilized response. See the discussion in this thread:
www.comsol.com/community/forums/general/thread/94991
The force can be applied more or less as you write it, that is as an expression containing the displacement.
Regards,
Henrik
Since the problem is nonlinear, your only option is to solve it as a time dependent problem, and run a large number of cycles until you get a stabilized response. See the discussion in this thread:
www.comsol.com/community/forums/general/thread/94991
The force can be applied more or less as you write it, that is as an expression containing the displacement.
Regards,
Henrik