铁路环境振动单排桩隔振数值分析

采用有限元软件ANSYS建立了列车-大地-排桩耦合动力分析模型，运用瞬态动力学方法，针对单排桩桩深、桩径、截面形式和材料等结构参数对隔振效果的影响进行了分析，得出排桩的隔振机理和规律．分析表明，单排桩桩深、桩径和材料的变化对隔振效果的影响比较大，而桩身截面形式的变化对隔振效果的影响不大，这主要是由排桩的衍射效应决定其隔振效果引起的．

Numberic Analysis on Railway Environment Vibration Isolation by Row of Piles

The paper uses finite element software ANSYS to establish the train-ground-piles coupled dynamic model.By means of the transient dynamic method,it analyzes isolation effect on four kinds of structure parameters including the pile depth,the pile diameter the section form and the material.The vibration isolation mechanism and the rule of piles are studied.The analysis indicates that the change of pile depth,the pile diameter and the material have sharp influence on the vibration isolation effect,but change of the pile section form has little influence on the vibration isolation effect,because the effectiveness of piles depends on its diffraction effect to waves.