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frequency domian output in comsol_Structural mechanics module

Posted Jan 21, 2014, 3:32 p.m. EST Structural Mechanics Version 4.3b 0 Replies

Xiang Yan
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For frequency domain analysis,
COMOL provides displacement and velocity output.
Since we deal with complex domain, u = u*exp(iwt). v=iwu*exp(iwt). They should be both complex.
COMSOL takes the real part of the output results as u=u_amp*cos(2*pi*f*t+u_phase).
My question is how comsol choose the amplitude and phase of the velocity output?
I think the amplitude of the velocity is 2*pi*f*u_amp. However, this value is not equal to the value that comsol outputs.

Thanks,

Shawn
0 Replies Last Post Jan 21, 2014, 3:32 p.m. EST
COMSOL Moderator

Hello Xiang Yan

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