Modeling and Eigenfrequency Analysis of Sound-Structure Interaction in a Rectangular Enclosure with Finite Element Method

Table 2

Comparison eigenfrequency analysis between simulations, analytical and experimental results.

mode	Finite element	Analytical	Experiment	FEM	FEM
	modelling (FEM)			error 1%	error 2%
	using COMSOL			versus	versus
	software			analytical	experimenta
1	55.11	40.9	50.1	25.7848	9.0909
2	82.74	72.4	74	12.4970	10.5632
3	116.2	93.3	91.5	19.7074	21.2565
4	138.03	123.1	119.5	10.8165	13.4246
5	147.01	124.1	124.5	15.5840	15.3119
6	196.81	174.7	172	11.2342	12.6061
7	216.39	194.4	192	10.1622	11.2713
8	227.59	203.3	194.05	10.6727	14.7370
9	243.87	241.8	235	0.8488	3.6372
10	283.28	251.2	245	11.3245	13.5131
11	289.25	283.3	275.5	2.0570	4.7537
12	293.49	319.5	313	8.8623	6.6476
13	323.72	342.3	338	5.7395	4.4112
14	342.03	359	352	4.9616	2.9149
15	370.58	380.5	374	2.6769	0.9229
16	382.35	405.1	395.5	5.9500	3.4393
Average of errors %		—		9.929963	9.281338