Experimental studies on the vibration of perforated sheet

摘要

In the experiment we have measured the resonant frequencies of per-forated sheets with perforation rates from 0.008 to 0.30.Compared those fre-quencies with the corresponding resonant frequencies of homogeneous,orun-perforated one we obtained an empirical relationship between the resonantfrequency and perforation rate,which can be used for industrial purpose.Wehave also studied the change of vibrational energy distribution of perforatedsheet related to that of homogeneous.