Why Solutions of full harmonic and MSUP Harmonic are not matching?

20 October 2021 0 8K Report

Dear all,

I am currently working on the harmonic response of the motor. I am calculating the ERP level waterfall diagram of 4 different areas in my system. I have created 4 different named selection of interested surfaces in the geometry of the motor.

I am interested in the frequency range of 700 hz to 1000 hz. So I have extracted 150 modes which is almost double of interested frequency range.

So ideally my solution of MSUP and Full solution should match closely. I am getting same solutions for 3 of 4 named selection but 1 Solution is not matching. I have tried with different damping ratio. It is matching only for 0% damping.

I have tried with different mesh sizes but no success.

Can anyone help me with the plausible problem. What did i missed?

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