基于闵科夫斯基差和优化波前法的二维天然堆石料生成方法及应用

doi:10.13722/j.cnki.jrme.2020.0049

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Abstract A new conditional algorithm for generating granular packing is proposed，by which the granular has the same complex geometries with the realistic granular and follows the target particle size，orientation angle and aspect ratio distributions. Firstly，amounts of morphology information of realistic granular is obtained through original particle image and a database is established. Secondly，by using the Minkowski difference for collision detection，the particle overlap check and the new particle packing could be carried out efficiently. Finally，in combination with the optimized advance front method，a particle packing model is generated，particle-by-particle. Compared with the existing methods，the granular generated by the developed method has the same complex geometries as the realistic particles and can consider arbitrary particle size，orientation angle and aspect ratio distributions. In addition，the granular packing model generated has a higher packing rate and packing volume ratio，for instance，respectively more than 800/s and 75% for rectangle particles in the MATLAB environment. A generation of complex granular material demonstrates the particle packing generated by the method can represent the same geometries and microstructure of realistic granular. Three direct shear test simulations carried out by the discrete element software of UDEC reveal that the developed method can be widely used in the analysis of mechanical properties of granular materials.

Key words： rock mechanics optimized advanced front method Minkowski difference complex geometry rockfill

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	Articles by authors
	LIU Xinrong1
	2
	DU Libing1
	2
	DENG Zhiyun1
	2
	GAO Guofu1
	2

Cite this article:

LIU Xinrong1,2,DU Libing1, et al. Generation and application of rockfill based on the Minkowski difference and the optimized advance front method#br#[J]. , 2020, 39(9): 1832-1846.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0049 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/I9/1832

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