【摘要】 基于动力学基本方程,运用有限单元法(FEM)和NEWMARK隐式积分方法,对车辆荷载(FWD荷载)作用下明沟隔振结构附近振动响应增强区的分布范围特征及其增强效应进行了弹塑性数值分析。考虑到人工截断边界上波反射对计算结果的影响,分别用传递边界和半无限单元来处理侧面和底面边界。文中主要考虑了隔振沟位置、隔振沟深度和宽度三个主要影响因素,并在计算结果的基础上分析总结了他们对隔振沟响应增强区的影响规律。更多还原

【Abstract】 According to the basic equation of dynamics,using FEM and NEWMARK implicit algorithm,an elastic-plastic numerical analysis was made to analyze the response magnified area of the vibration isolation construction of open trenches for the vibration induced by vehicle dynamic loads.In order to reduce the effect of wave reflecting on artificial boundaries,transmitting boundary and semi-infinite elements were respectively used to treat the lateral and underside boundaries.The position,depth and the width of open trenches were the three mainly considered factors.Finally,on the basis of the numerical calculation results,their effects laws were analyzed.更多还原