高速铁路屏障隔振效果的有限元分析

Finite Element Analysis of Reducing the High-speed Railway Vibration Using Barrier

针对高速铁路产生的环境振动问题,以隔振沟为研究对象,分析了高速铁路振动在屏障隔振各种参数下的隔振效果。通过有限元软件ANSYS建立高架结构车-桥-土层三维模型,模拟分析一定宽度、深度下,隔振沟内各种填充隔振材料和混凝土填充沟内不同宽度和深度时地面振动响应的变化,运用振幅衰减系数A_(rf)这一衡量标准进行隔振效果的分析。结果表明:在屏障隔振条件下能有效的减小地面的振动响应;软性材料隔振效果较明显;改变隔振沟尺寸只在一定范围内具有较好的隔振效果。此外,屏障隔振具有隔振效果明显、适用范围广的特点,在实际工程中已经有所应用。

According to the environmental vibration produced by high-speed railway,this paper took the isolation trench as the research object.In order to analyze the vibration isolation effect of high speed railway vibration under various pa-rameters of barrier vibration isolation.The finite element software ANSYS was adopted to develop a3-D model including viaduct,bridge and soil layer,which was used to study various vibration isolation materials in the vibration isolation ditch,as well as the change of the ground vibration response of a concrete filling ditch by changing its width and depth by useing the amplitude attenuation coefficient-ARF as a measure of judgment.The result shows that the vibration response of the ground can be effectively reduced under the condition of barrier isolation,the vibration isolation effect of soft mate-rial is obvious.It has good vibration isolation effect in a certain range by changing the size of the vibration isolation groove.In addition,the barrier vibration isolation has the advantages of obvious vibration isolation effect and wide appli-cation range,which has been widely used in practice.