【摘要】 为减小附近交通车流载荷对高科技设施平台微振动的影响,建立了承台—桩—土体的全三维有限元模型.车流载荷引起的场地位移由现场实测获得,地基为弹性层状地基.运用并行算法中的区域分解法,分析了采用空沟与填充沟隔振时的减振效果,并对影响减振效果的关键性参数进行参数化研究.通过与实测比较,验证计算结果.计算结果为工程的减振设计提供了重要的参考依据.文中最后,分析了三种不同的分区方案对并行算法的加速比与并行效率的影响.更多还原

【Abstract】 Three-dimensional finite element model of the cap-pile-soil was built in order to investigate the micro vibration of high technology facilities excited by the near traffic vehicles.The soil was considered as elasticity layered medium,and results of traffic-induced ground displacement measured at the field were used as input.Isolation methods included open trench and in-filled trench.Based on domain decomposition method of parallel computing,vibration reduction effects due to open trench and in-filled trench were studies.Compared with the test results,the finite element model was proved.The simulation results could provide reference for the design of vibration reduction.Finally,the speedup and parallel efficiency of three kinds of partition schemes ware analyzed.更多还原