Analysis of the Vibro-Acoustic Behavior of a Stiffened Double Panel-Cavity System

Table 2

First eight natural frequencies of the stiffened double panel-cavity coupled system.

Mode no	Natural frequencies (Hz)
	M = N = 7	M = N = 8	M = N = 9	M = N = 10	M = N = 11	M = N = 12	ANSYS
1	51.963	51.890	51.471	51.436	51.317	51.295	50.555
2	73.439	73.211	71.734	71.638	71.506	71.441	70.141
3	79.493	79.302	78.021	77.941	77.763	77.711	76.159
4	85.457	84.708	84.709	84.436	84.437	84.279	83.801
5	86.783	86.054	86.055	85.791	85.788	85.637	85.127
6	113.23	113.20	112.57	112.57	112.08	111.99	109.52
7	130.05	130.02	129.74	129.75	129.58	129.59	128.58
8	157.83	157.82	154.68	154.71	154.25	154.29	151.56