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Mass Participation

Question asked by Alec Chalmers on Oct 6, 2011
Latest reply on Dec 2, 2011 by Bill McEachern

The universally accepted level of mass participation for a linear dynamic study is 0.80, at least in the axis of interest. In several studies llately I am having a hard time getting to the 0.80 participation without including hundreds of frequencies which creates extremely long duration solutions or forces the engineer to shut the simulation down as it begins to page to virtual memory. Ultimately the frequencies included in an analysis will be in the 10kHz - 20kHz range, frequencies that are far removed from the frequencies in the dynamic profile being simulated and at levels that do not have significant mechanical effects. Does anyone have a guideline as to the acceptable mass participation that will generate accurate results?