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different results of simulating mechanical resonant frequency

Posted Oct 16, 2012, 6:16 p.m. EDT Structural Mechanics 0 Replies

Suiqiong Li
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I am trying to simulate the longitudinal (x axis) mechanical resonant frequency of a free standing beam. I set the constrain at y and z axis and did the simulation. However, even I keep every parameters and mashing same, the enginfrequency changes a little bit every time I re-solve the problem. Shouldn't the calculation results be same?

I also add a layer materials with different mass, and simulate the frequency change. However, after I add the layer, it always shows error message: "out of memory during assembly". I don't know how to solve the problem.

I am using COMSOL 3.4.

Please give my some help.
0 Replies Last Post Oct 16, 2012, 6:16 p.m. EDT
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Hello Suiqiong Li

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