岩土力学2012，Vol.33Issue(4)：1079-1086,1102,9.
饱和土体中空沟对移动荷载被动隔振的2.5D边界元法分析
Analysis of effectiveness of passive isolation for vibration due to moving loads on saturated soil by using open trench with 2.5D boundary element method
摘要
Abstract
Based on Biot's theory and considering the property of moving loads, the boundary integral equations in the frequency domain-wave number for semi-infinite saturated soil is obtained by using the integral transform methods. The Cauchy type singularity of the 2.5D boundary integral equation is discussed and the effectiveness of passive vibration isolation using the open trench on the saturated soil is analyzed. Comparing the result with an existing one shows a good agreement. Numerical results show that, the present 2.5D boundary element method (BEM) is not only adaptable to solve the dynamic responses of moving loads with complicated boundary conditions, but also the computation time can be decreased greatly. For moving loads with high velocity, a considerable oscillation reduction of the pore pressure and the vertical displacement can be achieved by using open trench. The open trench barrier has no effect on the horizontal displacement for moving loads with lower velocity, even has the amplificatory effect on the vibration. Moreover, with the increasing of the distance between the vibration source and the open trench, the isolation effect of the surface wave propagation may be improved.关键词
2.5D边界元法/空沟/移动荷载/饱和土/被动隔振Key words
2.5D boundary element method/ open trench/ moving loads/ saturated soil/ passive vibration isolation分类
建筑与水利引用本文复制引用
徐斌,雷晓燕,徐满清,刘林芽..饱和土体中空沟对移动荷载被动隔振的2.5D边界元法分析[J].岩土力学,2012,33(4):1079-1086,1102,9.基金项目
国家自然科学基金资项目(No.50969007,No.50978099) （No.50969007,No.50978099）
国际科技合作与交流专项项目(No.2010DFA82340) （No.2010DFA82340）
中国博士后基金第48批资助项目(No.20100480609) （No.20100480609）
江西省自然科学基金(No.20114BAB206012) （No.20114BAB206012）
江西省教育厅科技项目(No.GJJl1252,No.GJJ12629). （No.GJJl1252,No.GJJ12629）
