Study on Acoustic Characteristics of a Flexible Plate Strongly Coupled with Rectangular Cavity

Table 2

The first eight natural frequencies of the strongly coupled plate-cavity system.

		Mode number
		1	2	3	4	5	6	7	8
		33.564	46.523	78.589	112.209	163.658	171.812	207.975	269.727
		33.548	46.580	78.575	85.232	125.997	137.665	162.189	175.863
		33.547	46.579	78.572	84.802	125.100	137.282	161.111	172.606
		33.547	46.579	78.572	84.797	125.090	137.275	161.095	172.552
		33.547	46.579	78.572	84.797	125.090	137.275	161.094	172.552
		33.564	46.622	78.587	112.179	163.590	171.759	207.902	269.588
		33.548	46.580	78.574	85.211	125.963	137.635	162.141	175.742
		33.547	46.578	78.571	84.764	125.033	137.231	160.992	172.268
		33.547	46.578	78.571	84.757	125.020	137.220	160.965	172.175
		33.547	46.578	78.571	84.757	125.019	137.220	160.965	172.174
		33.564	46.622	78.587	112.176	163.582	171.754	207.894	269.571
		33.547	46.580	78.573	85.211	125.962	137.634	162.140	175.741
		33.547	46.578	78.571	84.764	125.032	137.229	160.991	172.265
		33.547	46.578	78.571	84.757	125.018	137.218	160.962	172.167
		33.547	46.578	78.570	84.757	125.018	137.218	160.962	172.166
FEM		33.509	46.513	78.413	84.577	124.670	136.810	160.420	171.570
Ref [21]		33.574	46.596	78.608	84.102	124.680	137.112	161.082	172.334