本文選題：斜坡堤　切入點：越浪　出處：《大連理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：斜坡堤是近海沿海地區(qū)抵御海浪災(zāi)害的有效屏障,是人工掩護(hù)的沿海港口的重要組成部分。越浪量是斜坡堤設(shè)計的一個重要參數(shù),這個參數(shù)主要被用于確定斜坡堤的堤頂高程。綜合考慮結(jié)構(gòu)的安全性和經(jīng)濟成本,預(yù)測斜坡堤在各種情況下的越浪量和制定其允許越浪量標(biāo)準(zhǔn)就顯得格外的重要。 本文利用FLUENT軟件,基于粘性不可壓縮流體的雷諾時均N-S方程和κ-ε湍流模型,采用有限體積法對控制方程進(jìn)行離散,建立數(shù)學(xué)模型�；谫|(zhì)量源造波、動量源消波的方法,采用VOF方法捕捉自由表面,開發(fā)了無反射造波的二維數(shù)值波浪水槽,在不增加水槽長度的前提下實現(xiàn)了造波的長歷史性。通過分別模擬規(guī)則波和不規(guī)則波,并且與理論值對比,驗證了該數(shù)值波浪水槽的精確性。 利用所建立的數(shù)值波浪水槽模擬規(guī)則波作用下斜坡堤的越浪,其中包括無胸墻斜坡堤和有胸墻斜坡堤。通過分解其中一個周期的過程矢量圖,分析波浪在越浪過程中的運動特性。模擬了文獻(xiàn)中部分工況,并將數(shù)模計算越浪量與物模試驗結(jié)果對比,二者吻合良好,趨勢一致,驗證了該模型在處理斜坡堤越浪問題方面的有效性和精確性,具有一定工程適用性。 接著進(jìn)行不規(guī)則波在斜坡堤上越浪量的研究,通過建立模型,分別討論了相對頂高、斜坡坡比和相對水深等因素與平均越浪量的關(guān)系,將數(shù)值計算結(jié)果與文獻(xiàn)結(jié)果對比,二者吻合良好,趨勢一致。
[Abstract]:Slope embankment is an effective barrier to resist wave disaster in coastal areas near the sea and an important part of the artificially sheltered coastal port. The amount of overrunning waves is an important parameter in the design of slope levees. This parameter is mainly used to determine the top elevation of the slope embankment. Considering the safety and economic cost of the structure, it is very important to predict the overtopping quantity of the slope embankment under various conditions and to formulate its allowable surcharge standard. In this paper, based on Reynolds time averaged N-S equation and 魏-蔚 turbulence model of viscous incompressible fluid, the control equation is discretized by finite volume method, and the mathematical model is established by using FLUENT software. The VOF method is used to capture the free surface, and a two-dimensional numerical wave flume is developed without increasing the length of the flume. By simulating the regular wave and the irregular wave respectively, and comparing with the theoretical values, The accuracy of the numerical wave flume is verified. The established numerical wave flume is used to simulate the surpassing of the slope embankment under the action of regular waves, including the slope embankment without chest wall and the slope embankment with chest wall. The characteristics of wave motion in the process of surpassing waves are analyzed. Some working conditions in the literature are simulated, and the numerical simulation results are compared with the results of the physical model test. The results are in good agreement with each other and the trend is consistent. The validity and accuracy of the model in dealing with the problem of slope breakwater surpassing are verified, and the model has certain engineering applicability. Then, the relationship between the relative top height, slope ratio and relative water depth and the average surpassing wave volume is discussed, and the numerical results are compared with the results of the literature, by establishing the model of the irregular wave surpassing quantity on the slope embankment, and by establishing the model, the relationship between the relative top height, slope ratio and relative water depth is discussed respectively. The two are in good agreement and the trend is consistent.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U656.21

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