劉學炎的答辯信息-文庫吧資料
2025-06-29 22:02本頁面
【正文】 ulations, forecasting and management and maintenance on the engineering, and the main contents is the process of the flood wave propagation speed, wave, water level and flow characteristics with time in the detention basin and downstream and foreign scholars has done a great deal of research on the problem, there are three major research methods with theoretica research l, experimental research and numerical calculation. Because of plexity in the problem, numerical calculation bees byandby the main research tool.In recent years,people have done a lot of dambreak problem obtained from research. Onedimensional numerical simulation of dambreak flow is mainly based on openchannel flow movement of SaintVenant equations, because it has a clear physical concept, puting simple and reliable calculation results and so is still widely used in practical engineering, especially for long rivers, largescale the simulation, but its lack of precision. Twodimensional numerical simulation which develops rapidly is mainly based on twodimensional shallow water equations, and numerical methods include finite difference method, finite volume method and finite element method and so on. Twodimensional model and a twodimensional bination of a twodimensional model is also be applied to engineering practice. As assumptions of the shallow water equations made to simplify some of its applications are limited. Compared with a twodimensional mathematical model and a onedimensional mathematical model, the research on threedimensional numerical simulation is rel
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