【作者】 杨锦凌；

【导师】 孙大鹏；

【作者基本信息】 大连理工大学 ， 港口、海岸及近海工程， 2012， 硕士

【摘要】 对于斜坡式的防浪建筑物,越来越多的学者和研究人员通过物理和数值波浪水槽模拟爬高和越浪,数值模拟具有实验室的物模实验无法比拟的优点,如费用低、不受场地因素限制、减小模型比尺效应带来的误差等等。因此,通过数值手段模拟斜坡堤的爬高和越浪正在被越来越多的学者所采用。本文基于FLUENT软件,采用k-ε湍流模型和有限体积法,采用VOF方法捕捉自由表面,由连续性方程和动量方程推导出源项表达式,利用FLUENT的UDF宏编写程序,在数值水槽内实现造波和消波,通过计算的结果表明：本文应用的动量源造波方法较质量源造波方法一方面可以消除波浪遇结构物传到造波区的二次反射波,实现了波浪的长历时性。另一方面减小了数值波浪水槽的长度,因此减小了波浪在数值水槽内传播而出现的沿程衰减,实现了数值计算的精确性和高效性。通过本文方法建立的无反射数值波浪水槽,依据文献中所采用的模型,验证了依据本文动量源数值波浪水槽模拟斜坡堤爬高和越浪的正确性。分别分析了越浪量的影响因素如平台宽度、平台超高和来波波陡,模拟了在有胸墙和无胸墙时,多组工况下的斜坡堤越浪量,通过绘制爬高和越浪矢量图,系统的分析了波浪在一个周期内的爬高和越浪的全部运动特性,最后通过本文的数值模拟结果和文献中的结果相对比,二者趋势一致,结果吻合良好,表明本文建立的无反射数值波浪水槽能够实现计算的精确性和高效性,对于工程实际的研究具有指导作用。更多还原

【Abstract】 The sloping buildings are used for preventing wave. More and more scholars and researchers are researching wave’s run-up and overtopping by numerical and physical simulation. The numerical simulation has the incomparable advantages compared with the laboratory physical model experiment, such as low cost, no restrict space, reducing errors effect of model scale. So more and more scholars are researching run-up and overtopping of slope dike by means of numerical simulation.Based on the FLUENT software, the k-ε turbulence model and finite volume method, the volume of fluid method traces free surface. According to the continuity equation and momentum equation, we are deducing source function. According to numerical sink’s function and with the development of UDF realize wave making and no reflection wave flume. On the one hand, the wave flume of momentum source could eliminate the second reflecting wave of building and realize long time of wave. In the other hand, it reduces the decay of wave due to reduce the length of wave sink.According to this paper’s method, we established numerical wave flume of no reflection. Based on the literature’s model, we are verifying the numerical simulation slope dike’s wave run-up and overtopping on the basis of momentum source in this paper. The paper analyzes the wave’s influence factors, such as platform’s width, platform’s height and wave steepness. After simulating many groups of wave conditions with breast wall and no breast wall, drawing the vector diagram of wave run-up and overtopping and analyzing all wave movement characteristics in a cycle. In the last, the trend is consistent through comparing with result of numerical and physical simulation. The result shows that the no reflection numerical wave tank can realize the accuracy of the calculation and the high efficiency, and is a guiding role for actual project’s research.更多还原