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Landslide disaster scene simulation method based on material point method

A landslide and scene simulation technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of small application range, complex interaction process, and inability to truly simulate the interaction between solid and fluid, and achieve realistic results , the effect of improving efficiency

Active Publication Date: 2019-07-09
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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  • Landslide disaster scene simulation method based on material point method
  • Landslide disaster scene simulation method based on material point method
  • Landslide disaster scene simulation method 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 method comprises the following steps: 1) modeling and drawing a disaster phenomenon of the landslide in the field of computer graphics; 2) improving a yield surface criterion on the basis of a traditional MPM method, and introducing a modified Cambridge model. and 3) proposing a bidirectionalcoupling model based on the action of the granular material and the rigid body of MPM so that the soil-rock interaction in the landslide process is more real, and the efficiency of large-scale complex disaster scene simulation is improved. The landslide disaster scene simulation method solves the problem of landslide disaster scene simulation deficiency in computer graphics, and can simulate themovement between soil particles, the collision between stone rigid bodies and the coupling phenomenon between the soil particles and the stone rigid bodies in the landslide occurrence process.

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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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 王章野赵建旺张海童
Owner ZHEJIANG UNIV
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