A numerical simulation analysis method and system for debris flow dynamics

Abstract

The invention belongs to the technical field of debris flow disaster prevention and environmental management, and discloses a new type of debris flow dynamics numerical simulation analysis method and system. By analyzing the debris flow channel material start, debris flow movement and accumulation process and mechanism, a variety of debris flow dynamics are obtained. The characteristic constitutive equation; at the same time, based on the non-alternating format central difference numerical method, simulate various debris flow dynamic processes; and analyze the dynamic characteristics of debris flow slurry and solid particles, introduce the concept of material exchange rate caused by debris flow erosion dynamic bed, analyze The erosion and scale changes along the debris flow form a numerical simulation program of formation-movement-accumulation based on the dynamic process of debris flow. The numerical simulation program and numerical calculation method of the present invention have the characteristics of simplicity and high efficiency, and are suitable for use by workers in related disaster fields to improve the scientific level of debris flow prevention and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of mud-rock flow disaster prevention and environmental management, and in particular relates to a mud-rock flow dynamics numerical simulation analysis method and system. Background technique [0002] At present, using the Navier-Stokes equation depth averaging method to simulate the dynamic initiation, movement, accumulation and other processes of debris flow under real terrain is a hot spot in the field of disasters. Because the Navier-Stokes depth averaging equation can accurately reflect the The entire dynamic process of debris flow is shown, and the equations are solved more easily, so that the calculation example can properly break through the scale effect and successfully realize the simulation of large-scale cases. At present, the more advanced algorithm is based on the windward finite difference method. Although it can ensure that the difference equation has a high-precision numerical solution, it wi...

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Problems solved by technology

[0005] To sum up, the problems existing in the existing technology are: the existing traditional mathematical fitting method lacks practicability, scientificity cannot reflect the real dynamic process; the numerical simulation technology has low precision in simulating the dynamics of debris flow disasters, and the discrete equations are complex, etc. Defects: In numerical simulation, accuracy and timeliness are often inversely proportional. If you blindly pursue high precision, the time complexity will increase geometrically, and if the accuracy is too low, it will be difficult to achieve the expected effect of numerical simulation.

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