Hello all,

I am running a TVA (torsional vibration analysis) on a screw compressor set. The engine is a cummins 12-cyl vee driving an ingersoll-rand screw compressor.

Assembling the mass elastic model is no problem, as is modeling the torsional forcing function from the engine. However, the torsional forcing function from the screw is giving me fits... anyone have any good resources on accurately modeling the torsional forcing function of a screw compressor??

Thanks in advance,

-matt