Block discrete element model generation method based on progressive finite element mesh and Voronoi segmentation method

A model generation and finite element technology, applied in the field of block discrete element model generation, can solve problems such as low generation efficiency, large number of blocks, and complicated operations, and achieve high generation efficiency, good block quality, and high modeling efficiency. Effect
CN108520138AActive Publication Date: 2018-09-11CHONGQING UNIV +1
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2018-09-11

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Abstract

The invention relates to a block discrete element model generation method based on a progressive finite element mesh and a Voronoi segmentation method and belongs to the field of numerical calculation. The method includes the steps of S1, drawing modeling information by using CAD; S2, reading the modeling information and generating a high-quality, continuous and progressive triangular mesh; S3, generating a discrete model and outputting a final calculation file; S4, integrating steps S1-S3 into software, so that a DDA block discrete element model, a UDEC block discrete element model and a 3DECblock discrete element model which are directly used for calculation are generated directly by only drawing CAD drawings and defining the minimum size of blocks. A specific block size distribution rule or size data can be defined, the block discrete element models which satisfy specific spatial distribution are generated, and the problem that a given size distribution rule cannot be generated according to current methods is solved.
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Description

technical field

[0001] The invention belongs to the field of numerical calculation, and relates to a block discrete element model generation method based on a progressive finite element grid and a Voronoi segmentation method. Background technique

[0002] The block discrete element regards the rock mass as a discontinuous discrete medium composed of rocks and joints. In the calculation, large displacement, rotation, sliding and even block separation are allowed inside the rock mass. Meanwhile, the block and joint parameters are macroscopic parameters, which can be compared Realistically simulate nonlinear large deformations in jointed rock masses. The current block discrete element method is widely used in geotechnical engineering fields such as landslide dynamics, tunnel excavation, masonry stability, and rock mass fissure seepage. However, the calculation cost of block discrete elements is high, and the calculation accuracy and efficiency are highly dependent on the numbe...

Claims

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