AN EFFICIENT RPIM FOR SIMULATING WAVE MOTIONS IN SATURATED POROUS MEDIA

摘要：

An efficient meshless technique for simulating wave motions in saturated porous media is introduced in this paper. Using radial point interpolation method (RPIM) and considering the precision requirement in wave motion simulation, a lumped-mass RPIM for saturated porous media with clear physical concepts is derived. Combining explicit time integration with the lumped-mass RPIM leads to a decoupled radial point interpolation method (decoupled RPIM) for dynamic analysis without solving algebra equation set. A two-dimensional problem is calculated by the proposed decoupled RPIM, the ordinary RPIM,and the finite element method (FEM). The accuracy and efficiency of these methods are compared, which demonstrate that the proposed decoupled RPIM has comparable accuracy with the ordinary RPIM and the finite element method, but has high efficiency in simulating wave motions in saturated porous media.

关键词： saturated porous media meshless method radial point interpolation method explicit integration scheme

作者: S.L. Chen Y.X. Li

作者单位: Dept. of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China;Dept. Dept. of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

会议类型: 国际会议

会议名称: 14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)

会议地点: 北京

会议语种:英文

在线出版日期: 2008-10-12（万方平台首次上网日期，不代表论文的发表时间）