In view of the control of ground vibration isolation

a novel type of vibration isolation barrier

open trench-wave impedence block barrier

is proposed. The vibration isolation performance is analyzed by numerical simulation. Firstly

the governing equation of a non-splitting perfect matched layer (PML) absorbing boundary is established in the frequency domain by using complex coordinate stretching. Secondly

using Galerkin approximation technology

the frequency-domain finite element method formula of the second-order non-splitting PML with displacement as the basic unknown quantity is given. Finally

through numerical examples

the influence of physical parameters (modulus ratio of foundation to wave barrier)

geometric parameters (trench depth

wave impedence block depth) and load parameters (frequency of vibration source) on the vibration isolation performance are investigated. The results show that the open trench-wave impedence block barrier can effectively control the ground vibration caused by different frequency vibration sources.