HEC-RAS与MIKE溃坝洪水数值模拟研究进展

Research Progress on Numerical Simulation of HEC-RAS and Mike Dam-Break Flood

溃坝后洪水流速快、破坏力大、影响范围广,严重危害下游地区的人民生命财产安全。为了准确了解溃坝洪水造成的危害,对溃坝问题的研究背景、数值模拟常用软件及功能进行论述,并总结了溃坝模拟软件一维、二维和三维模型的特点,着重分析HEC-RAS和MIKE两款主流洪水数值模拟软件的国内外研究现状及特点。结果表明:HEC-RAS具有操作方便,界面简单等特点,MIKE具有效率高,应用广泛等特点,两款软件都可以准确进行溃坝模拟,促进了解溃坝机理,对维护大坝安全有着重要意义,研究成果可为后续的溃坝洪水研究提供参考。目前溃坝洪水数值模拟方法已经接近完善,但还存在对于泥沙、紊流等因素无法在数值模拟软件具体体现等问题,未来仍需进一步解决。

After dam-break,the flood flow is fast.The destructive force is big.The influence scope is wide,which seriously endangers the safety of people's life and property in the downstream area.In order to accurately understand the damage caused by dam-break flood,this paper discusses the research background of dam-break problem.The common software of numerical simulation and its functions,the characteristics of one-dimensional,two-dimensional and three-dimensional models of dam-break simulation software are summarized,and the research status and characteristics of HEC-RAS and Mike are emphatically analyzed.The results show that HEC-RAS has the characteristics of easy operation,simple interface and Mike has the characteristics of high efficiency and wide application.The two software can carry out dam-break simulation accurately and promote the understanding of dam-break mechanism.which is of great significance for the maintenance of dam safety.The research results can provide a reference for the follow-up study of dam-break flood.At present,the numerical simulation method of dam-break flood is nearly perfect,but there are still some problems that cannot be embodied in the numerical simulation software for such factors as sediment and turbulence,which need to be further solved in the future.