高速铁路空沟隔振措施隔振效果的有限元分析

Finite Element Analysis of Reducing the High speed RailwayVibration Effect on the Environment Using Open Trenches

摘要:

高速铁路引起的振动对周边环境的影响是不容忽视的，需要采取相应的工程对策来减小其危害。采用空沟隔振施工方便，隔振效果能得到保证，故在实际工程中得到广泛应用。本文使用大型通用有限元软件ABAQUS对空沟隔振的效果进行数值分析。计算模型采用无限元和黏弹性边界吸收振动波，减小边界反射波对计算结果的影响；文中引入参数ARF来评价空沟的隔振效果，在此基础上分析不同的空沟尺寸及不同的荷载频率对隔振效果的影响，可供设计者参考。

Abstract:

The high-speed railway vibration effect on the environment has become more and more widespread in recent years，and technical measurements are needed to minimize the damage to the environment caused by this new transportation vehicle. It has been shown that open trenches can be used for this purpose because of their easy construction and relatively good isolation effects. The finite-element software ABAQUS was adopted to analyze the open trench isolation effects.In order to adequately absorb the shock wave and reduce the impact of border-reflected waves on the results, the infinite element and visco-elastic boundary is used in this model.The parameter ARF is introduced in the calculation procedure so as to evaluate the isolation effects.The reduction effect of different factors that influence the resulting vibration reduction，such as the different sizes of an open trench and the frequency of the vibration load，are also discussed.The obtained approaches can be applied by designers in this area.