A METHOD OF INTRODUCING FLUID DYNAMIC EQUATIONS TO DICRETE-CONTINUOUS SOLID
JIN Weifeng1，ZHOU JIAN2，3
(1. Zhejiang University of Technology and Science，Hangzhou 310023，China；2. Department of Geotechnical Engineering，
Tongji University，Shanghai 200092，China；3. Key Laboratory of Geotechnical and Underground Engineering of
Ministry of Education，Tongji University，Shanghai 200092，China)
Abstract：In order to apply two-scale coupled approach for solid phase to saturated soil，a scheme coupling fluid and discrete-continuous solids is established. For fluid-phase，based on the ALE(arbitrary Lagrangian Eulerian) description which is convenient to control moving boundaries and meshes，unified fluid dynamic equations are established. Besides，the fluid-solid interaction terms which exhibit unified forms and pick up fluid-solid interaction forces in the discrete and continuous domains respectively，are incorporated in these fluid equations. Then based on the Characteristic-based split algorithm，the split of the developed fluid dynamic equations is performed to obtain the proper forms suitable for a standard Galerkin-type discretization procedure. Finally，this proposed method is applied to simulation of underground structure buried in liquefiable soil under seismic excitation，which demonstrates that this scheme incorporates discrete-continuous solids and unified fluid dynamic equations can effectively depict non-continuous contacts between particles and the underground structure，decrease the number of particles for simulation，and take into account moving boundaries for fluid-phase caused by underground structure as well.
陈建峰，郑 希，李辉利，等. 软土地基加筋土挡墙二维离散-连续耦合模拟[J]. 土木工程学报，2011，44(增)：33-36.(CHENG Jianfeng，ZHENG Xi，LI Huili，et al. Coupling discontinuum-continuum simulation of a geogrid-reinforced soil retaining wall (RSW) on soft soil[J]. China Civil Engineering Journal，2011，44(Supp.)：33-36.(in Chinese))
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2015, Vol. 34 
