Resonance condition damping effects

A continuation of the preceeding diaphragm integration indicates a seemingly resonant condition after several cycles of the applied wall reactions. This result has little effect on the first response peaks and disappears with the application of a reasonable amount of damping. 

The design criteria should be set so that all of the eigenfrequencies remain far enough from the resonance frequency. If we are close to resonance, damping has to be more effective in order to assure safe operating conditions. This is shown on Figure 4, where points under the curve correspond to an inadmissible region. 

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