Fast Mathematical Modeling Method for Irregular Discrete Element Simulation Model Based on Real Terrain

Abstract

The invention discloses a fast mathematical modeling method for an irregular discrete element simulation model based on real terrain, which includes establishing a current surface digital elevation model and a historical surface digital elevation model; constructing a plane grid; taking projections, and constructing a stacked space point set ; Construct the historical surface wall model and the current surface wall model; construct the push-and-displacement discrete unit sphere model with the space point set of the stacking volume; assign the mechanical parameters of the model through the discrete element simulation software, and perform balance calculations to obtain the balance model. Delete the historical surface wall model, and obtain the irregular discrete unit simulation calculation model based on the real terrain. The invention establishes a high-precision discrete element simulation wall model and a sphere unit model, and realizes the simple and efficient conversion of the real terrain and the calculation model. The method is simple, fast and efficient for the establishment of the irregular model, and is convenient for follow-up Engineering analysis work such as geotechnical analysis.

Description

technical field [0001] The invention relates to the numerical simulation field of geological engineering, in particular to a fast mathematical modeling method for an irregular discrete element simulation model based on real terrain. Background technique [0002] Discrete element simulation is an analysis and simulation technology for discrete materials based on the principle of dynamics. Its basic idea is to discretely divide the solution space into several block units or particle units, and define the equation of motion between the units. The time-step iteration method is used to solve the problem, and how to obtain the motion form of the discontinuum has been widely used in the field of geotechnical engineering. [0003] At present, many discrete element simulation software can only establish regular wall and accumulation particle unit models, and complex topography and loose accumulations in geotechnical engineering can only be simplified or constructed through complex mo...

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