本文選題：非線性波　切入點(diǎn)：堤防工程　出處：《中國(guó)海洋大學(xué)》2014年碩士論文

【摘要】：淺海堤防工程保護(hù)著沿海地區(qū)免受波浪潮流的侵襲，，但近年來全球氣候變暖、海平面上升、風(fēng)暴潮等自然災(zāi)害的頻發(fā)，嚴(yán)重威脅淺海堤防工程的安全和穩(wěn)定性。堤防工程破壞事故的時(shí)有發(fā)生對(duì)沿海的國(guó)民經(jīng)濟(jì)造成了巨大的損失。因此，堤防工程的安全和穩(wěn)定標(biāo)準(zhǔn)值得進(jìn)一步深入探究。隨著計(jì)算流體力學(xué)的迅速發(fā)展，應(yīng)用數(shù)值波浪水槽進(jìn)行波浪與結(jié)構(gòu)物的作用研究成為了近年來的前沿研究課題之一。本文對(duì)通過數(shù)值模擬的方法對(duì)淺海堤防的受力及穩(wěn)定性進(jìn)行了進(jìn)一步研究，對(duì)堤防工程的安全建設(shè)和防護(hù)提供了一定的參考價(jià)值。 首先利用流體力學(xué)分析軟件Flow-3D，基于粘性流體假設(shè)和自由表面追蹤的VOF方法，結(jié)合RNG k紊流模型，采用有限差分法求解Navier-Stokes方程，并進(jìn)行二次開發(fā)，用橢圓余弦波模擬淺水波，建立一個(gè)主動(dòng)吸收式的造波邊界，結(jié)合孔隙結(jié)構(gòu)的消波邊界，建立了無反射的二維非線性波浪數(shù)值水槽，并驗(yàn)證了該數(shù)值水槽造波的有效性。 接著在該波浪數(shù)值水槽的基礎(chǔ)上進(jìn)一步建立了淺海堤防數(shù)值模型，通過對(duì)不同工況下單堤和復(fù)式海堤兩種斷面受力的數(shù)值模擬和試驗(yàn)對(duì)比，并對(duì)堤面上最大波壓力的分布和變化規(guī)律進(jìn)行分析，驗(yàn)證了該淺海數(shù)值模型的可靠性。 然后對(duì)不同戧臺(tái)位置、戧臺(tái)寬度及上下坡坡度的復(fù)式海堤進(jìn)行了數(shù)值模擬，分析了戧臺(tái)位置、戧臺(tái)寬度及上下坡坡度對(duì)海堤結(jié)構(gòu)受力的影響，得到了一些有益的結(jié)論。 最后從力學(xué)本質(zhì)建立了斜坡堤護(hù)面塊體的失穩(wěn)圖式，對(duì)護(hù)面塊體的波浪作用力進(jìn)行分析，考慮堤坡坡度、堤前相對(duì)水深、堤前波坦三個(gè)方面對(duì)最大波浪負(fù)壓力的影響，得到斜坡堤上法向最大相對(duì)波浪負(fù)壓力沿堤面分布的經(jīng)驗(yàn)表達(dá)式，進(jìn)而從力的角度得到護(hù)面塊體穩(wěn)定重量的計(jì)算公式；同時(shí)確定了斜坡堤堤面上最不利受力區(qū)域的范圍，對(duì)工程應(yīng)用具有一定的指導(dǎo)意義。
[Abstract]:Shallow water levees protect coastal areas from waves, but in recent years global warming, sea level rise, storm surges and other natural disasters have occurred frequently. It is a serious threat to the safety and stability of the shallow water levee engineering. The breakage accident of the levee project has caused huge losses to the national economy of the coastal area from time to time. The standards of safety and stability in embankment engineering deserve further exploration. With the rapid development of computational fluid dynamics, The application of numerical wave flume to the study of the interaction between waves and structures has become one of the frontier research topics in recent years. In this paper, the force and stability of shallow water dikes are further studied by numerical simulation. It provides a certain reference value for the safety construction and protection of embankment engineering. Firstly, the fluid mechanics analysis software Flow-3D, VOF method based on viscous fluid hypothesis and free surface tracing, combined with RNG k turbulence model, is used to solve the Navier-Stokes equation with finite difference method, and the elliptical cosine wave is used to simulate shallow water wave. An active absorbing wave boundary is established and the wave absorbing boundary of pore structure is combined to establish a two dimensional nonlinear wave numerical flume without reflection. The effectiveness of the wave generation is verified. Then the numerical model of shallow water embankment is established on the basis of the wave numerical flume. The distribution and variation of the maximum wave pressure on the surface of the breakwater are analyzed, and the reliability of the model is verified. Then, numerical simulation is carried out on the multiple embankments with different dike positions, dike width and slope gradient, and the influence of the position of the dike, the width of the dike and the slope of the upper and lower slope on the stress of the seawall structure is analyzed, and some useful conclusions are obtained. Finally, according to the mechanics essence, the instability diagram of slope embankment surface block is established, and the wave force is analyzed. The influence of slope degree, relative water depth in front of embankment and wave tan in front of breakwater on the maximum wave negative pressure is considered. The empirical expression for the distribution of negative normal relative wave pressure on the slope embankment is obtained, and the formula for calculating the stable weight of the block on the slope embankment is obtained from the angle of force, and the range of the most unfavorable force area on the slope embankment surface is determined. It has certain guiding significance for engineering application.
【學(xué)位授予單位】：中國(guó)海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U656.314;TV139.26

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王大國(guó);鄒志利;唐春安;;波浪對(duì)箱形船作用的三維耦合計(jì)算模型[J];船舶力學(xué);2007年04期

2 ;High-Order Models of Nonlinear and Dispersive Wave in Water of Varying Depth with Arbitrary Sloping Bottom[J];China Ocean Engineering;1997年03期

3 齊鵬 ,王永學(xué) ,鄒志利;2-D Composite Model for Numerical Simulations of Nonlinear Waves[J];China Ocean Engineering;2000年01期

4 黃碧珊;板護(hù)面的斜坡上波浪打擊壓力特性的研究[J];重慶交通學(xué)院學(xué)報(bào);1991年02期

5 肖波;;波浪槽產(chǎn)生橢圓余弦波的理論分析[J];港口工程;1989年02期

6 蔣宗燕,潘寶雄,黃碧珊;斜坡護(hù)面上波浪打擊壓力的試驗(yàn)研究[J];港口工程;1998年01期

7 樸正;馬小舟;董國(guó)海;;斜坡式防波堤人工護(hù)面塊體穩(wěn)定重量計(jì)算公式研究[J];中國(guó)港灣建設(shè);2013年03期

8 薛鴻超;;波浪作用下斜坡堤護(hù)面塊體的穩(wěn)定問題[J];華東水利學(xué)院學(xué)報(bào);1982年03期

9 鐘瑚穗;;斜面坡度對(duì)波浪最大壓力的影響[J];華東水利學(xué)院學(xué)報(bào);1985年01期

10 鐘瑚穗;;波浪沖擊壓力理論和模比影響的研究[J];河海大學(xué)學(xué)報(bào);1988年02期

相關(guān)博士學(xué)位論文 前2條

1 周援衡;波浪與拋石防波堤相互作用及其砂質(zhì)海床動(dòng)力響應(yīng)分析[D];中南大學(xué);2011年

2 劉臻;岸式振蕩水柱波能發(fā)電裝置的試驗(yàn)及數(shù)值模擬研究[D];中國(guó)海洋大學(xué);2008年

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