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

Table 3

Schedule of parameters for the annular trench.

Depth d (cm)	Width (cm)	Source distance l (cm)	Central angle θ (degrees)
30	10	60	90
50	20	100	120
70	30	140	150
90	40	180	180