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

Table 7

List of vibration isolation areas.

Test conditions	2-1	2-2	2-3	2-4	2-5	2-6	2-7	2-8	2-9	2-10	2-11	2-12
W	0.03	0.05	0.08	0.10	0.05	0.11	0.16	0.22	0.11	0.22	0.33	0.44
A0.4 (m^2)	0.75	1.05	1.60	1.16	0.85	1.10	1.43	1.40	1.21	1.68	1.85	1.82
η	0.36	0.38	0.52	0.48	0.39	0.40	0.52	0.51	0.53	0.61	0.60	0.55

A_S,0.1 = 2.42 m², A_S,0.2 = 2.75 m², A_S,0.3 = 3.10 m², and A_S,0.4 = 3.31 m², in which 0.1, 0.2, 0.3, and 0.4 represent the width of the trench (m).