Test on the Influence of Geometric Parameters of an Annular Trench on the Vibration Isolation Area

Table 9

List of vibration isolation areas.

Test conditions	3-1	3-2	3-3	3-4	3-5	3-6	3-7	3-8	3-9	3-10	3-11	3-12
L	0.16	0.27	0.38	0.49	0.33	0.55	0.76	0.98	0.65	1.09	1.53	1.96
A0.4 (m^2)	0.62	1.05	1.36	0.99	0.67	1.10	1.36	1.54	0.99	1.68	1.83	1.93
η	0.23	0.38	0.52	0.37	0.25	0.40	0.52	0.56	0.37	0.61	0.70	0.71

A_S,0.6 = 2.68 m², A_S,1.0 = 2.75 m², A_S,1.4 = 2.62 m², and A_S,1.8 = 2.72 m², where 0.6, 1.0, 1.4, and 1.8 represent the distance of source vibration (m).