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Coupling calculation method based on granular flow and finite difference method

A technology of finite difference method and calculation method, applied in the direction of calculation, special data processing application, instrument, etc., can solve the problems of high requirements for computer hardware, high calculation cost, and inability to analyze the mesoscopic characteristics of soil particles.

Inactive Publication Date: 2014-10-08
SOUTHEAST UNIV
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Problems solved by technology

[0002] At present, in the field of numerical calculation of rock and soil mechanics, commonly used methods include finite element method, finite difference method, particle flow and other methods. The macroscopic analysis of rock and soil cannot analyze the mesoscopic characteristics of soil particles; the particle flow method treats rock and soil as a discrete body and analyzes the mesoscopic characteristics of rock and soil, but considering the spatial scale, the particle flow method The radius and the size of the smallest structure in the engineering model should maintain a certain ratio (the internal scale is generally 0.01 to 0.1), which causes the particle flow model to require millions of three-dimensional particles, resulting in high computer hardware requirements for particle flow calculations , the computational cost is large

Method used

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  • Coupling calculation method based on granular flow and finite difference method
  • Coupling calculation method based on granular flow and finite difference method
  • Coupling calculation method based on granular flow and finite difference method

Examples

Experimental program
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Embodiment 1

[0061] Example 1: Simulation of the movement process of the slope and landslide on the rock mass foundation overlay

[0062] The bedrock inclination angle of the calculation model is 10°, and the rock mass is granite; the material of the slope accumulation body is sandy soil, the slope toe is 30°, and the slope height is 1.15m. The reduction factor is 1.67, and the slope is unstable and landslides.

[0063] The calculation method of the invention is used to calculate the slope landslide process. The specific calculation process is as figure 1 with figure 2 Shown:

[0064] (1) First determine the scope of slope soil and bedrock, and divide the problem domain into discrete medium area and continuous medium area. For the slope soil part, the particle flow method is used to establish the calculation model, and for the bedrock part, the finite difference method is used. Create computational models (such as image 3 shown), input the identification of the calculation problem d...

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Abstract

The invention relates to a coupling calculation method based on granular matter mechanics and a finite difference method, and belongs to the technical field of calculation of rock mechanics. In terms of limitation of an existing discrete medium and continuous medium computational simulation method, a method that any position on the surface of granular flow / finite difference grid is coupled is adopted to achieve transmission of interaction force of boundaries of two different media, granular flow and finite difference grids are calculated with the newton second law as a basis, and a rock and soil material calculation model with consideration of full coupling of discrete media and continuous media is established. According to the method, boundary coupling calculation of discrete media and continuous media can be effectively achieved, multiscale analysis can be conducted on stress characteristics of rock and soil bodies, and application of the granular flow and the finite difference method on the geotechnical engineering technical field is propelled forcefully.

Description

technical field [0001] The invention relates to a calculation and simulation method for discrete media and continuous media, in particular to a coupling calculation method for particle flow and finite difference method, and belongs to the technical field of calculation rock and soil mechanics. technical background [0002] At present, in the field of numerical calculation of rock and soil mechanics, commonly used methods include finite element method, finite difference method, particle flow and other methods. The macroscopic analysis of rock and soil cannot analyze the mesoscopic characteristics of soil particles; the particle flow method treats rock and soil as a discrete body and analyzes the mesoscopic characteristics of rock and soil, but considering the spatial scale, the particle flow method The radius and the size of the smallest structure in the engineering model should maintain a certain ratio (the internal scale is generally 0.01 to 0.1), which causes the particle ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 赵学亮
Owner SOUTHEAST UNIV
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