Simulation method of landslide disaster scene based on material point method

A landslide and scene simulation technology, applied in design optimization/simulation, computer-aided design, etc., can solve problems such as small scope of application, complex interaction process, and inability to realistically simulate the interaction between solids and fluids.

Active Publication Date: 2020-11-13
ZHEJIANG UNIV
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Problems solved by technology

However, these two methods can only be used simply as the boundary conditions of solid or fluid, and cannot truly simulate the interaction between solid and fluid.
However, due to the physical complexity of the interaction process in the two-way coupling method, there is no analytical solution, and there are various differences between different methods, so the scope of application is small.

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  • Simulation method of landslide disaster scene based on material point method
  • Simulation method of landslide disaster scene based on material point method
  • Simulation method of landslide disaster scene based on material point method

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Embodiment Construction

[0063] The landslide disaster scenario simulation based on the material point method, its specific implementation method is to include the following steps

[0064] 1) In the field of computer graphics, the disaster phenomenon of landslides is modeled, and the following calculations are performed at each time step of the modeling process: transfer the soil particle data to the grid, calculate the force and update speed of the grid, and process Mesh collision, update deformation gradient, deal with particle collision, deal with plastic flow and hardening; among them, particle volume and density need to be calculated in the first time step;

[0065] 2) Improve the yield surface criterion on the basis of MPM method, introduce the modified Cambridge model, and divide the deformation gradient of soil particles into elastic deformation gradient part and plastic deformation gradient part by calculating the average principal stress and deviatoric stress; The hardening parameter updates...

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Abstract

The invention discloses a landslide disaster scene simulation method based on a material point method. The steps are as follows: 1) model and draw the disaster phenomenon of landslide in the field of computer graphics. 2) Based on the traditional MPM method, the yield surface criterion is improved, and the modified Cambridge model is introduced. 3) A two-way coupling model based on MPM for granular material and rigid body interaction is proposed, which makes the soil-rock interaction more realistic during the landslide process and improves the efficiency of large-scale complex disaster scene simulation. The invention solves the problem of lack of landslide disaster scene simulation in computer graphics, and can simulate the movement between soil particles, the collision between rock rigid bodies and the coupling phenomenon between soil particles and rock rigid bodies during the occurrence of landslides .

Description

technical field [0001] The invention relates to the fields of particle flow simulation and fluid-solid two-way coupling simulation based on particles, in particular to a physics-based landslide simulation framework based on soil mechanics and graphics. Background technique [0002] Physics-based simulation of natural scenes has always been a hot research topic in the field of computer graphics. Its content can be divided into two branches: real-time simulation for game entertainment and offline simulation for film and television special effects. From the perspective of evaluating simulation efficiency and simulation effect, the former pays more attention to the efficiency of calculation, that is, real-time performance; while the latter pays more attention to visual effects, that is, realism. But even so, in the production of realistic special effects in the film and television industry, it is very important to improve the efficiency of calculation and drawing and reduce the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 王章野赵建旺张海童
Owner ZHEJIANG UNIV
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