本文關(guān)鍵詞：基于MIKE模型在內(nèi)河航道整治中應(yīng)用研究　出處：《重慶交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 數(shù)值模擬 非恒定流 航道工程

【摘要】：本文利用丹麥DHI公司開發(fā)的水動力學(xué)MIKE模型，采用MIKE21，MIKE3模塊分析了航道工程中船閘灌泄水非恒定流對引航道水流條件的影響，同時重點分析了航道整治中壩下清水下泄對航道泥沙沖淤的三維泥沙運動規(guī)律影響。 本文主要針對基于MIKE軟件的數(shù)值模擬在內(nèi)河航道工程中的應(yīng)用進(jìn)行探索與研究，在此對以下兩個問題進(jìn)行了模擬，模擬結(jié)果驗證基本吻合，滿足我們的相似性要求，可以說明MIKE軟件在航道工程中是適用的，同時也為內(nèi)河中的泥沙問題分析在數(shù)學(xué)模型上的選擇提供了有利的參考。模擬內(nèi)容包括： ①以某船閘工程中閘室泄水過程模擬為例，充分展現(xiàn)了MIKE21中開邊界條件在船閘泄水非恒定流中模擬的優(yōu)勢，計算結(jié)果不僅能夠得出需要水位和流速，，還能清晰的反映出引航道內(nèi)及口門區(qū)水面隨時間的波動規(guī)律，并且從軟件自帶的后處理界面中很明顯觀察出引航道內(nèi)有往復(fù)流存在。此外，對計算結(jié)果加以分析，研究了該工程水面波動對航深的影響以及往復(fù)流對船舶停靠的影響； ②以國內(nèi)典型的山區(qū)河流瀾滄江曼廳大沙壩河段為實例，首先應(yīng)用MIKE3模擬了橄欖壩電站修建運行后清水下泄對曼廳大沙壩的沖刷與淤積。通過三維泥沙數(shù)值模擬較好的反映出彎道和丁壩作用下泥沙運動的三維性，使計算結(jié)果更加合理。整個模型方案采用非恒定流動床試驗，計算時長為8個月，河道范圍約為7公里。其次將三維模擬結(jié)果與物理模型模擬結(jié)果在河床橫斷面形態(tài)上進(jìn)行比較，最后深入分析了修建電站后壩下清水下泄沖淤對航道穩(wěn)定及維護的影響。
[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.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U617

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