土石流・土砂くずれ・液状化・噴火とシミュレーション(<小特集>災害とシミュレーション)

概要

論文の詳細を見る
The mechanical behavior of a particle assembly is described besed on Cundall's distinct element method (DEM) which uses an explicit numerical scheme. Particle interaction was detected at every contact, and particle motion modelled for each particle in an assembly. But the conventional DEM is hardly applicable to the cohesive soil because the effect of cohesion between particles has not been considered in this method. We have developed a modified distinct element method (MDEM), in which the effect of cohesion is considered as nonlinear pore springs between particles. This method, MDEM, can follow the total fracture process even after discontinuity of the medium occurs. This method, MDEM, is applied to simulate the debris flow, cliff collapse, sand liquefaction and volcanic eruption. Numerical results obtained in this study agree well with laboratory tests as well as seismic damages observed during past earthquakes.
日本シミュレーション学会の論文
1990-06-15