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Nonlinear vibrating beam
Posted Dec 13, 2015, 2:00 p.m. EST Version 5.0 1 Reply
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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.
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1 Reply Last Post Dec 14, 2015, 2:18 a.m. EST
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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