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

Table 5

First eight natural frequencies of the stiffened double panel-cavity coupled system with the boundary springs of the stiffener.

Mode	Natural frequencies(Hz)
	kvs = 1E1	kvs = 1E3	kvs = 1E5	kvs = 1E7	kvs = 1E9
1	34.864	34.902	38.046	50.814	51.425
2	44.971	45.056	52.671	71.464	71.629
3	69.460	69.463	69.701	77.762	77.938
4	75.465	75.470	75.935	84.005	84.406
5	83.956	83.956	83.956	85.784	85.786
6	85.784	85.784	85.784	110.70	112.54
7	93.866	93.880	95.204	123.16	129.68