Numerical Simulation Study On Vibration Damping Technology Of Laboratory Test Base

In this paper,a three-dimensional finite element model is set up based on the principle of rock soil dynamics,and the vibration isolation effect of different forms and material isolation barrier is numerically analyzed.The main research contents are as follows(1)According to the theory of elastic wave,the types and characteristics of vibration wave propagation in soil are discussed,and the working mechanism of vibration isolation barrier is analyzed on the basis of the theory.(2)This paper introduces the problem of finite element analysis of geodynamic problems,such as grid division,time analysis step and so on.Several kinds of finite element dynamic analysis soil boundary types are analyzed,and the viscoelastic boundary is compared with the general boundary by ABAQUS,which verifies the accuracy of the viscoelastic boundary analysis problem.(3)Based on ABAQUS,a mathematical model of continuous barrier isolation system is established,and the influencing factors of barrier performance,such as barrier material properties,continuous barrier number and barrier settings are studied.(4)The dynamic response of different foundation forms and arrangement modes under the action of fixed azimuth source and ground vibration source is analyzed.The results show that,for the fixed azimuth vibration source,the different layout methods can make the foundation have different dynamic responses,and the dynamic response of the hexagon foundation is better than that of the square base,no matter which form of the vibration source.