Gravelly soil layer discrete element simulation method considering particle shape randomness

A particle shape, simulation method technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of not considering the geometric shape of crushed stone, can not randomly generate convex polygon crushed stone, etc., to achieve easy automatic generation. Effect

Inactive Publication Date: 2018-05-18
TONGJI UNIV
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Problems solved by technology

In the early discrete element research on soil-rock mixture, only the influence of rock content was considered, and the gradation was only simple gradation (linear uniform distribution of particle size). In addition, the geometric shape of crushed stone was not considered, and random Generate convex polygonal gravel

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  • Gravelly soil layer discrete element simulation method considering particle shape randomness
  • Gravelly soil layer discrete element simulation method considering particle shape randomness
  • Gravelly soil layer discrete element simulation method considering particle shape randomness

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Embodiment Construction

[0042] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0043] A discrete element simulation method of gravel soil layer considering the randomness of particle shape, such as figure 1 shown, including:

[0044] Step S1: Generate the gravel soil grading curve, specifically: use the two-parameter Weibull distribution model truncated at both ends to generate the grading curve of gravel particles in the gravel soil layer. This grading model needs to have a rich grading curve, At the same time, the required parameters are few, and the construction is convenient;

[0045] The Weibull probability and statistics distribution model is a continuou...

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Abstract

The invention relates to a gravelly soil layer discrete element simulation method considering particle shape randomness. The method comprises the steps of S1: generating a gravelly soil grading curve;S2: establishing a shape library of normalized random convex polygons; S3: obtaining disk filling representations of the polygons in the shape library by adopting a medial axis transformation-based disk filling coverage method; S4: randomly generating convex polygon particles different in size based on the grading curve through the disk filling representations of the polygons according to the shape library; S5: generating small-diameter particles to fill the convex polygon particles; and S6: adding a gravity field for enabling a whole system to be balanced, and finishing the building of a model. Compared with the prior art, the method is used for simulating rock-soil aggregate strata, so that the engineering problems of constitutive relations of rock-soil aggregates, destruction forms, foundation pit excavation, slope stabilization, tunneling and the like can be conveniently researched.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a discrete element simulation method for gravel soil layer considering the randomness of particle shape. Background technique [0002] In geotechnical engineering, gravel soil is a kind of special rock-soil medium. Compared with the traditional soft clay or sandy soil, the particle strength in the gravel soil layer is high, but there is almost no cohesion between the particles, and the difference in particle size is large, so the physical and mechanical properties displayed are more complex. With the development of tunnel construction in China, the transportation network has been continuously improved and extended. In the tunnel construction in recent years, the engineering problems of shield tunnels in gravel soil layers have gradually attracted the attention of experts and scholars. [0003] At present, scholars at home and abroad have done a lot of experimental research from ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 谭勇李想刘楚楠陈万垒
Owner TONGJI UNIV
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