颗粒离散元法工程应用的三大问题探讨

doi:10.13722/j.cnki.jrme.2019.0977

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Abstract The particle discrete element method(DEM) is generally used in the macro-micro investigations of rock and soil samples. In order to simulate engineering problems，it is necessary to use larger elements to represent the rock and soil masses and to assign corresponding mechanical properties. However，there are three problems in the application of the DEM：(1) it is difficult to directly get the packing model with specific mechanical properties，i.e. the modeling is difficult，(2) large-scale engineering applications are limited by the huge computational cost and (3) the multi-field and fluid-solid coupling theory and software are not perfect. On the basis of analyzing the essence and research progress of these problems，macro-micro conversion formulas and an automatic training method are proposed for fast modeling. High performance numerical calculations can be completed based on the matrix discrete element method and the pore density flow method is introduced to realize fast multi-field and fluid-solid coupling simulations. Based on these solutions，a high-performance discrete element software MatDEM was developed from scratch，and large deformation，multi-field and fluid-solid coupling numerical simulations were realized. Finally，key science and technology problems in the future researches were discussed.

Key words： geotechnical engineering discrete element method engineering application MatDEM

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	LIU Chun1
	2
	LE Tiancheng1
	SHI Bin1
	ZHU Yao1

Cite this article:

LIU Chun1,2,LE Tiancheng1, et al. Discussion on three major problems of engineering application of the particle discrete element method#br#[J]. , 2020, 39(6): 1142-1152.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.0977 OR http://rockmech.whrsm.ac.cn/EN/Y2020/V39/I6/1142

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