The Numerical Simulation Of Flow And Sediment Transport And Ship Movement In Plane Two Dimensions And Its Application

The quantitative prediction of the mutual influences of the engineering and river arenecessary for the planning and design stage in hydraulic engineering and waterwayengineering. The prediction results directly determine the project’s decision-making aswell as the success or failure. There are observed data analysis, numerical simulation,physical model test and etc., included in current prediction methods. The observed dataanalysis is mainly to analyze the actual observations of the river and to make qualitativeconclusions of the mutual influences. The physical model test and ship model test werethe only way for this quantitative prediction in the1980s. However, a lot of manpowerand material resources and longer test cycle are required. In recent years, the numericalsimulation of water and sediment and ship motion, which saving time, effort, cost lessand flexible, had become one of the main techniques of quantitative analysis with therapid development of numerical simulation techniques.In this paper a two-dimensional flow and sediment transport model with the finiteelement method was established based on hydrodynamics, river dynamics and shipkinetic theory and on the works of the previous researches, and the ship movementmodel was established base on the successive integration. And, the correspondingcomputer program was developed. In addition, the navigation standard in two dam（Sanxia to Gezhouba）, the water and sediment conditions and fluvial process ofChongqing Guoyuan wharf reach on Yangtze River and the water conditions in waterintake of Chongqing Huaneng power plant were studied based on these two models.Using these two models can solve related technical problems and provide a scientificbasis and technical support for related projects.The paper is divided into seven chapters.In Chapter1, the development of water and sediment numerical simulation and shipmotion numerical simulation was systematically introduced. Some key theoretical andtechnical problems in the flow and sediment transport model has not been satisfactorilyresolved yet, The research on the basic theory of water and sediment movement need tobe strengthened for a long time, promoting the further development of the mathematicalmodel of water and sediment. The calculation model and method of hydrodynamiccoefficients in shallow water, and a combination of modern technology with virtualreality to make it more realistic need to be solved in ship motion simulation. In Chapter2, the basic equation and Finite Element discretization for flow andsediment mathematical model were described. The selection for formulas of sedimentcarrying capacity of the flow and sediment mathematical model, the selection andtreatment methods of river channel rough rate were analyzed. Finally, the mathematicalmodel of two-dimensional water and sediment was established.In Chapter3, the basic equation and the discretization for ship motion numericalsimulation were studied. The computing model of a few key hydrodynamic coefficientswas introduced. Then, the formula for the ship motion numerical simulation wasconstructed. And a verification analysis, which shown the results of numericalsimulation agreed well with the experimental results, with the experimental data of2640HP+4×1000T full scale ship was made.In Chapter4, the calculation and analysis, based on the model established in thesecond chapter, of the main rapids’ flow conditions between Three Gorges to Gezhoubaat the construction period of the Three Gorge cofferdam project are made. Thenumerical simulation of Train’s Ability in passing shoals with rapids of six kinds shipwas carried out, based on the ship motion mathematical model established in the secondchapter. The limit flow of the representatives of different ships the river reach of twodams was determined, which adopted by navigation standards of reach between the twodams in the Sanxia dam construction cofferdam stage.In Chapter5, the flow condition in the port before and after the construction ofChongqing Guoyuan wharf has been studied, based on the flow and sedimentmathematical model established in the second chapter,. The results show the SecondStage construction of Guoyuan wharf has less on the flow conditions in general, but thevelocity of Mingyuexia water area in the Guoyuan Port downstream increasedsignificantly in case of deluge, especially catastrophic flood, It will lead to ship uplinkdifficult. On this basis, the numerical model of Sediment Scouring and deposition hasbeen made up to20years considering the operational programmers of the Three GorgesReservoir. The results have shown that the normal operation of the port area is lessaffected by sediment because the front line of the Guoyuan wharf is located outside thebody of the sediment deposition.In Chapter6, the selection of intake location, in-taking water condition and theinfluence of sediment deposition in Huaneng power plant reaches of Jialing River werestudied. The results showed that the recommended location of water intake was areasonable choice, there was no cumulative sediment deposition and water flow conditions were better. The results provided technical support for engineering design.In the seventh chapter, a brief summary of the above research work is done, and theforeground is prospected for water and sediment numerical simulation technology andship motion simulation technology.