Novel dynamic numerical debris flow simulation analysis method and system

Abstract

The invention belongs to the technical field of debris flow disaster prevention and control and environmental governance, and discloses a novel dynamic numerical debris flow simulation analysis method and a novel dynamic numerical debris flow simulation analysis system. Through analysis on startup of a debris flow channel material and the process and the mechanism of debris flow movement accumulation, a number of constitutive equations suitable for the dynamic characteristics of a debris flow are obtained; meanwhile, based on a non-alternating format central difference numerical method, various dynamic processes of the debris flow are simulated; in addition, the dynamic characteristics of a slurry and solid particles of the debris flow are analyzed, a concept that a movable debris flow erosion bed causes the material exchange rate is introduced, and erosion along the distance as well as the disaster size change of the debris flow are analyzed so as to form a formation-movement-accumulation numerical simulation program based on the dynamic process of the debris flow. The numerical simulation program and a numerical calculation method, provided by the invention, have the characteristics of simpleness, high efficiency and the like, and are suitable to be used by workers in the related disaster field; the scientific levels of the debris flow prevention and control and environment protection are improved.

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 novel 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,...

AI Technical Summary

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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