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

Table 3

Natural frequencies under different boundary conditions.

Boundary conditions	Results	Mode number
		1	2	3	4	5	6	7	8
SSSS	Present method	33.547	46.578	78.571	84.764	125.033	137.231	160.992	172.268
	FEM	33.509	46.513	78.413	84.577	124.670	136.810	160.420	171.570
SSSC	Present method	40.389	48.410	85.340	96.514	127.324	150.292	168.131	191.673
	FEM	40.309	48.330	85.109	96.178	126.930	149.650	167.440	190.370
SSCC	Present method	48.625	50.755	93.262	108.600	130.969	164.836	175.427	213.522
	FEM	48.480	50.651	92.932	108.070	130.500	163.880	174.590	211.580
SCCC	Present method	51.439	62.058	104.229	111.989	150.289	175.091	194.538	217.899
	FEM	51.270	61.869	103.770	111.400	149.510	173.960	193.280	215.930
CCCC	Present method	55.198	75.789	115.662	117.261	172.088	187.087	210.256	228.636
	FEM	54.993	75.459	115.010	116.620	170.820	185.720	208.430	226.560