青龙河洪水演进数值模拟

发布时间：2018-06-21 12:50

本文选题：水动力 + 数值模拟　；参考：《哈尔滨工程大学》2014年硕士论文

【摘要】：随着计算机技术和流体数值模拟的技术的不断发展进步,越来越多的水利规划设计应用到模型模拟技术进行设计参数的筛选和验证。研究基于青龙莲花河河道水利规划设计要素,建立适用于该区域的工程改造后的水动力学数值模型,借助数值模拟的技术分析该工程实施后各种极端的水文条件下河道的排洪情况,为日后工程的运行管理提供技术基础。根据河道的防洪和洪水波传播的不同特点,使用一维和二维数值模拟的流体动力学方程,建立洪水演进数值模型,分析了河道设计规划中各种频率来水工况下的泄流能力。本文完成主要工作包括:(1)应用丹麦水利研究院(DHI)开发的MIKE11模型,建立青龙莲花河改造工程实施后的河道一维水动力学模型。整个河道改造工程涉及61个改造断面、5条支流入口及4条引水支渠。数值模拟的边界条件选择洪水频率包含P=1%、P=2%、P=5%和P=10%多种情况。(2)应用丹麦水利研究院(DHI)开发的MIKE21模型,构建在极端洪水情况下青龙莲花河部分河段发生漫堤时,该区域的泛洪区的平面二维洪水淹没过程的数值模拟模型。研究采用MIKE FLOOD模块,以一维二维模型动态耦合的方式进行模拟。在该模式下平面二维模型的边界将由MIKE FLOOD模块自动赋予,一维河道洪水溢出量将动态赋予到二维模型的指定边界中。该研究得到参数结果与青龙莲花河水利规划设计资料的参数基本吻合。同时验证该改造工程后青龙莲花河能够抵御10年一遇的洪水,得出该改造工程中部分断面的岸堤需要加固加高的结论。对于洪水漫堤时发生的淹没分析,本次研究应用一维二维模型动态耦合的方式进行模拟,提高了计算的效率,比较适合洪水淹没分析。
[Abstract]:With the development of computer technology and fluid numerical simulation, more and more water resources planning and design are applied to model simulation to screen and verify the design parameters. Based on the elements of water conservancy planning and design of the Lianhua River in Azure Dragon, a hydrodynamic numerical model suitable for engineering reconstruction in this area is established. With the help of numerical simulation technology, the flood discharge situation of the river under various extreme hydrological conditions after the implementation of the project is analyzed, which provides a technical basis for the operation and management of the project in the future. According to the different characteristics of flood control and flood wave propagation, a numerical model of flood routing is established by using the hydrodynamic equations of one-dimensional and two-dimensional numerical simulation, and the discharge capacity under various frequency conditions in river design planning is analyzed. The main work accomplished in this paper includes the application of MIKE11 model developed by the Danish Water Conservancy Research Institute (DHI) and the establishment of a one-dimensional hydrodynamic model of the river course after the implementation of the Azure Dragon Lianhua River Reconstruction Project. The whole river course reconstruction project involves 61 sections with 5 tributaries and 4 branch canals. The selected flood frequency of the numerical simulation boundary condition includes five percent and ten percent of the water resources. MiKE21 model developed by the Danish Water Conservancy Research Institute is used to construct the embankment of part of the Lianhua River in Azure Dragon under extreme flood conditions. The numerical simulation model of the planar two-dimensional flood process in the flooding area of this region. In this paper, the mime FLOOD module is used to simulate the dynamic coupling of one-dimensional and two-dimensional model. In this model, the boundary of the two-dimensional model will be automatically assigned by the Mike FLOOD module, and the flood overflow volume of the one-dimensional channel will be dynamically assigned to the specified boundary of the two-dimensional model. The results of this study are in good agreement with the data of water conservancy planning and design in Azure Dragon Lianhua River. At the same time, it is verified that the Azure Dragon Lianhua River can withstand the flood once in 10 years, and it is concluded that the bank embankment of some sections of the reconstruction project needs to be strengthened and raised. For the flood analysis of overflowing embankment, the method of dynamic coupling of one-dimensional and two-dimensional model is used in this study, which improves the efficiency of calculation and is more suitable for flood analysis.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV122

【参考文献】