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溃坝过程及洪水波演进数值模拟研究(吴小川 )

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+{R@]R0【作者】吴小川 【导师】吴时强; 姜树海
u6P0N5d\Do0【作者基本信息】南京水利科学研究院,水力学及河流动力学,2004年,硕士

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【中文摘要】 大坝溃决形成的洪水,流量大,传播速度快,其破坏性极大。近半个世纪以来,大坝的溃决时有发生,给人类生命和财产安全带来了巨大的损失,大坝的安全问题也备受关注,其相关研究也越发活跃。 溃坝洪水波的运动情况十分复杂,影响因素较多,早期多是通过物理模型来进行研究。随着计算技术和数值方法的不断进步,越来越多的研究者对溃坝问题采用了数值计算的方式来模拟,数值计算的优越性也得到了越来越多的体现。 本论文在前人研究成果的基础上,针对土石坝溃坝特点,在国内首次建立一套从入库洪水过程开始包括水库调度计算、溃坝过程模拟和下游河道溃坝波传播计算的数学模型计算方法,更为切合实际地分析溃坝洪水波的演进规律,并预测溃坝波对下游河道影响程度,探讨预防措施。 本论文的主要研究内容及结论为: 1.在综述现有研究成果的基础上,采用现有的溃口形状演变的简化处理模式,针对溃坝洪水波的特点,建立一个包括考虑入库洪水过程、溃坝过程模拟和下游河道溃坝波传播计算的数学模型,可以对库区调蓄作用、溃坝过程以及下游河道和洪泛区的洪水波影响进行计算;2.结合浏阳河双江口水库规划工作,利用所建立的模型,分析不同频率的入库洪水和不同溃坝时间对溃坝洪...更多水波及其对下游河道两岸影响,尤其是对下游skm处浏阳市区的影响,研究分析了避险的措施,为溃坝洪水的灾害性分析及河流洪水预警系统的建立提供科学依据。关键词:溃坝过程,洪水波演进,二维水深平均水流数学模型,剖开算子法  还原水利论文iA%fz,W1`(w

(K;|fN2P0XA s"^$Az.a0【英文摘要】 The flood resulting from a dam breaking propagates quickly and often causes a calamity. During last half century, failures of dams occasional occurred; these accidents resulted in huge loss of property and life. The safety of dams is focused by many people. The correlative research is also more active.The dam-break phenomenon is extremely complex; it lies on many different factors. In earlier period, it is researched usually by experiments. With the development of the calculation technique and numerical methods, and also with the advancement of the computer, more and more numerical models are used to simulate the flood flow caused by dam-break.Based the former research results, a numerical model is developed to analyze dam-break accident. It is applied to predicting the result of dam-break flood flow and researching the methods to reduce risk of the flood.The main research content and conclusions:1. Adopting a dam-breach develop mode, a numerical model is developed to analyze dam-break...更多 accident. In this model, calculation of flood flow propagation integrates with regulation of reservoir volume and simulation of process of dam-break.2. Relating to Shuang Jiang Kou reservoir project, this numerical model is applied to analyze the effect of flood and research the methods of reduce risk in different reservoir inflow and different time of failure in Liu Yang city zone. The conclusions can be considered as references in flood prediction and city development project.  还原

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0i)P'xa4|p0【中文关键词】 溃坝过程; 洪水波演进; 二维水深平均水流数学模型; 剖开算子法水利论文r/NL b4av ^
【英文关键词】 process of dam-break; flood flow propagation; 2D depth-averaged numerical flow model; operator-splitting method(OSM)
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TAG: 数值模拟 研究 溃坝 洪水波 演进
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