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Mechanical vibrations of electrical machine

Mechanical vibrations of electrical machine

Mechanical vibrations of electrical machine

(OP)
I am planning to make as accurate vibration model of electrical machine as possible with Ansys Workbench. Since now, I have only been using FEA modal analysis for vibration design. This is my first time to compute vibration responses. I want to include rotor unbalance excitation and electro-magnetic excitation(2x supply) into analysis. Unbalance excitation can be handled with harmonic response analysis as far understand? The problem is electro-mg excitation which is rotating star shaped force pattern. I can get time dependent force data for individual stator tooth - which I am planning to integrate into my model. Transient response analysis is needed I guess? or is there any possibilities to model such force in harmonic response analysis?

Because this is a variable speed machine I would like to analyze run_up - coast_down testing with FEA are such speed weeps possible to do? Bearing vibrations could be read from the model and the result could be then compared to real measured data.

Have someone made such analysis - or anything similar? All experiences and tips are appreciated.

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