弯道水沙二维数值模拟及试验研究
发布时间：2018-11-23 19:57
【摘要】：河流与河床相互影响，相互制约，处于变化发展的过程中。在水流与河床相互作用的过程中，，泥沙运动起着纽带作用，泥沙的淤积使得河床抬高，通过泥沙的冲刷，河床降低。对可能发生的泥沙运动过程和河床变形进行定性和定量预测的正确与否，直接影响到水利工程的决策与成败。随着计算机的出现和现代高速电子计算机的发展，数学模型和系统模拟已被广泛应用。 本文主要研究内容如下： （1）对弯道水流泥沙运动规律的研究进展进行了系统的阐述，在此基础上开展本文的研究工作。 （2）建立平面二维水沙数学模型，采用Galerkin集中质量有限元法相结合的方法进行求解，采用Fortran语言编写程序实现以上算法。 （3）通过物理模型的实测资料来检验数学模型，模型吻合较好，表明了模型的正确性和合理性，并对试验中的纵向时均流速、横向时均流速的分布特点进行总结分析。最后对泥沙落淤情况进行了预测。
[Abstract]:Rivers and riverbeds interact and restrict each other and are in the process of changing and developing. In the process of interaction between water flow and river bed, sediment movement acts as a link, the silt silting causes the river bed to be raised, and the river bed is reduced by the erosion of sediment. Whether it is correct or not to predict the sediment movement process and the river bed deformation qualitatively and quantitatively has a direct impact on the decision and success of water conservancy projects. With the emergence of computers and the development of modern high-speed electronic computers, mathematical models and system simulation have been widely used. The main contents of this paper are as follows: (1) the research progress of the flow and sediment movement in bends is systematically described, and the research work of this paper is carried out on this basis. (2) the planar two-dimensional mathematical model of water and sediment is established and solved by Galerkin lumped mass finite element method. The above algorithm is realized by programming with Fortran language. (3) the mathematical model is verified by the measured data of the physical model, which shows that the model is correct and reasonable, and the distribution characteristics of the longitudinal and transverse average velocity are summarized and analyzed. Finally, the sediment deposition is predicted.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV149
[Abstract]:Rivers and riverbeds interact and restrict each other and are in the process of changing and developing. In the process of interaction between water flow and river bed, sediment movement acts as a link, the silt silting causes the river bed to be raised, and the river bed is reduced by the erosion of sediment. Whether it is correct or not to predict the sediment movement process and the river bed deformation qualitatively and quantitatively has a direct impact on the decision and success of water conservancy projects. With the emergence of computers and the development of modern high-speed electronic computers, mathematical models and system simulation have been widely used. The main contents of this paper are as follows: (1) the research progress of the flow and sediment movement in bends is systematically described, and the research work of this paper is carried out on this basis. (2) the planar two-dimensional mathematical model of water and sediment is established and solved by Galerkin lumped mass finite element method. The above algorithm is realized by programming with Fortran language. (3) the mathematical model is verified by the measured data of the physical model, which shows that the model is correct and reasonable, and the distribution characteristics of the longitudinal and transverse average velocity are summarized and analyzed. Finally, the sediment deposition is predicted.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV149
【参考文献】
相关期刊论文 前10条
1 白玉川,NG Chiu-on,沈涣庭,王尚毅;Rheological Properties and Incipient Motion of Cohesive Sediment in the Haine Estuary of China[J];China Ocean Engineering;2002年04期
2 白玉川,李世森,董文军;不平衡输沙计算中泥沙起悬量与沉降量的确定——以沉沙池为例[J];海洋通报;1996年06期
3 И.Л.罗索福斯基;尹学良;;弯道水流的研究[J];泥沙研究;1958年01期
4 张耀先,焦爱萍;弯曲型河道挟沙水流运动规律研究进展[J];泥沙研究;2002年02期
5 刘月琴;弯曲型河流基本特性研究进展[J];人民珠江;2003年02期
6 王尚毅,顾元h
本文编号：2352546
本文链接：https://www.wllwen.com/kejilunwen/shuiwenshuili/2352546.html
