Multi-scale debris flow phenomenon simulation method based on material point method

Abstract

The invention discloses a multi-scale debris flow phenomenon simulation method based on a material point method, and relates to the technical field of computer physical animation. The method comprisesthe following steps: S1, simulating multi-scale features of debris flow liquid slurry based on an adaptive material point method; S2, simulating multi-scale features of a debris flow solid phase object based on an adaptive material point finite element method; S3, simulating multi-scale liquid-solid coupling based on the material point method; S4, carrying out the multi-scale realistic renderingof debris flow animation. The method solves a problem of how to construct an effective physical model for describing multi-scale features of a debris flow disaster scene in the debris flow animation simulation process and a problem of building a consistency constraint between different models so as to achieve the multi-scale value solving and rendering. The method can achieve the realistic simulation of the multi-scale features of the debris flow phenomenon, achieves the generation of a debris flow animation with the fidelity of a picture, and provides the image data of the debris flow phenomenon for the disaster prevention, digital entertainment, film and television effects.

Description

technical field [0001] The invention relates to the technical field of computer physical animation, in particular to a method for simulating multi-scale debris flow phenomena based on a material point method. Background technique [0002] Debris flow, as a fluid geological disaster ubiquitous in the natural environment, has brought huge losses to human life, property and economic construction. For a long time, people have studied the movement law of debris flow in order to prevent and control it. However, the unpredictability and powerful destructiveness of debris flow disasters make it difficult for people not only to predict the time and place of debris flow to arrange observation and photography, but also to bear the danger and uncertainty brought about by its instantaneous destructive power. This eliminates the lack of real image data of debris flow disasters. However, in the fields of disaster prevention and relief, film and television special effects, and digital ent...

AI Technical Summary

Problems solved by technology

Among the traditional physical simulation methods, the Euler method is suitable for simulating large-scale deformation and incompressible fluid scenes, but it is difficult to track the details of fluid interfaces and small-scale eddies; the Lagrangian method avoids nonlinear convection terms and is convenient for tracking materials interface, especially the meshless particle method is very suitable for simulating small-scale detailed features, but the calculation is too complicated when simulating large-scale fluid scenes, and the imposition of essential boundary conditions is cumbersome

It can be seen that the Euler method and the Lagrangian method have their own advantages, but they also have their own shortcomings. It is difficult to use a single method to simulate the multi-scale characteristics of debris flow scenes

At present, there are many research works that couple different physical methods to form a hybrid method that can fully absorb their respective advantages and overcome their respective shortcomings. It can solve problems that cannot be solved by a pure single method, but the key problem is that different models The seamless processing of the interface is extremely complicated, and it is difficult to realize the realistic simulation of debris flow phenomenon with multi-scale physical characteristics

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