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

Table 1

Comparison eigenfrequencies between finite element model with analytical results in [3] for uncoupled system.

Mode	Analytical		Finite element (COMSOL)		Error %
	Panel	Enclosure	Panel	Enclosure
(1,1)	41.6	—	44.28	—	6.0524
(1,2)	73.7	—	75.66	—	2.5905
(2,1)	95.0	—	103.19	—	7.9368
(2,2)	124.6	—	127.05	—	1.9284
(1,0,0)	—	281.3	—	281.12	0.0640
(0,0,1)	—	337.6	—	338.98	0.4071
(0,1,0)	—	375.1	—	379.64	1.1959
(1,0,1)	—	439.5	—	446.27	1.5170
(1,1,0)	—	468.9	—	479.60	2.2310
(1,0,0)	—	504.7	—	511.83	1.3930
(1,1,1)	—	577.8	—	578.96	0.2004
Error %					2.3197