基于MIKE模型在内河航道整治中应用研究

发布时间：2018-01-06 20:27

本文关键词：基于MIKE模型在内河航道整治中应用研究　出处：《重庆交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：本文利用丹麦DHI公司开发的水动力学MIKE模型，采用MIKE21，MIKE3模块分析了航道工程中船闸灌泄水非恒定流对引航道水流条件的影响，同时重点分析了航道整治中坝下清水下泄对航道泥沙冲淤的三维泥沙运动规律影响。本文主要针对基于MIKE软件的数值模拟在内河航道工程中的应用进行探索与研究，在此对以下两个问题进行了模拟，模拟结果验证基本吻合，满足我们的相似性要求，可以说明MIKE软件在航道工程中是适用的，同时也为内河中的泥沙问题分析在数学模型上的选择提供了有利的参考。模拟内容包括： ①以某船闸工程中闸室泄水过程模拟为例，充分展现了MIKE21中开边界条件在船闸泄水非恒定流中模拟的优势，计算结果不仅能够得出需要水位和流速，，还能清晰的反映出引航道内及口门区水面随时间的波动规律，并且从软件自带的后处理界面中很明显观察出引航道内有往复流存在。此外，对计算结果加以分析，研究了该工程水面波动对航深的影响以及往复流对船舶停靠的影响； ②以国内典型的山区河流澜沧江曼厅大沙坝河段为实例，首先应用MIKE3模拟了橄榄坝电站修建运行后清水下泄对曼厅大沙坝的冲刷与淤积。通过三维泥沙数值模拟较好的反映出弯道和丁坝作用下泥沙运动的三维性，使计算结果更加合理。整个模型方案采用非恒定流动床试验，计算时长为8个月，河道范围约为7公里。其次将三维模拟结果与物理模型模拟结果在河床横断面形态上进行比较，最后深入分析了修建电站后坝下清水下泄冲淤对航道稳定及维护的影响。
[Abstract]:In this paper, based on the hydrodynamic MIKE model developed by DHI Company in Denmark, the influence of unsteady flow of shiplock discharge on the flow conditions of approach channel in waterway engineering is analyzed by using MIKE21 / MIKE3 module. At the same time, the effect of water discharge under the dam on the three dimensional sediment movement in waterway regulation is analyzed. In this paper, the application of numerical simulation based on MIKE software in inland waterway engineering is explored and studied. The following two problems are simulated, and the simulation results are basically consistent. It can be concluded that MIKE software is applicable in waterway engineering. At the same time, it also provides a favorable reference for the selection of mathematical models for sediment analysis in inland rivers. The simulation contents include: 1 taking the simulation of sluice chamber discharge process in a ship lock project as an example, the advantage of MIKE21 open boundary condition in simulating unsteady flow of lock discharge is fully demonstrated. The calculated results can not only get the required water level and velocity, but also clearly reflect the fluctuation of the water surface in the approach channel and the entrance area with time. In addition, the reciprocating flow in the approach channel is obviously observed from the post-processing interface of the software. In addition, the calculation results are analyzed. The influence of water surface fluctuation on navigation depth and the influence of reciprocating current on ship docking are studied. (2) take the typical mountain river Lancang River Manting Dashaba reach as an example. Firstly, MIKE3 was used to simulate the erosion and siltation of Manting Dashandam after the construction and operation of the Olive Dam Hydropower Station. The 3D sediment movement under the action of bend and groin was well reflected by three-dimensional sediment numerical simulation. Sex. The result of calculation is more reasonable. Unsteady flow bed test is adopted in the whole model, and the calculation time is 8 months. The range of the river is about 7 km. Secondly, the results of 3D simulation and physical model are compared on the cross section of the river bed. Finally, the influence of clear water discharge and siltation on channel stability and maintenance after the construction of power station is analyzed.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U617

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