Finite Element Simulation Of The Vibration Wave Spread In The Semi-infinite Soil Domain

Due to rapid industrialization and urbanization, Reports vibration felt by occupants of building structures caused by traffic peculiarly have been filed more frequently in metropolitan cities around the world. Open out the principle of vibration pollutant has become a serious problem must to be resolved immediately in the environment vibration domain. The research about environment vibration and its effect on structures around are associated with many other domains in structure engineering. The spread of vibration in the soil is one of many difficult items. In this thesis, the propagation of traffic-induced vibrations in the semi-infinite soil domain and their influence laws and the simulation to soil and the influence of vibration-isolation trench to vibration wave are analyzed on the basis of previous achievements of relevant researches, It can offer reference to feasibility research and environment influence evaluate of bridge track vibration.When we research the problem that vibration wave spread in the soil, we need think over the artificial boundary condition. This paper described the several methods of the problem considering boundary condition and introduced the research actuality of world on the vibration laws and vibration reducing.Based on ANSYS software, soil parameters in the simulation is not easy to determine, for example, elastic modulus, Poisson's ratio, damping, etc. In this paper, semi-infinite soil can be divided into numerous units where stiffness matrix can be used for the finite element simulation, we can combine stiffness of all units' stiffness matrix into the entire stiffness matrix of the soil researched, and adopt Newmark—βnumerical approach, prepare related dynamic procedures for analysis of vibration wave propagation, it is expected to seek a new analysis method. In this paper, we analyze the dynamic response of vibration wave in the one eighth space soil and semi-infinite soil domain and compare the difference about vibration between in the two soil model, and primarily analyze the influence of vibration-isolation trench to vibration wave effect. These provide reference for further research about environmental vibration and vibration isolation.