潜堤上波浪破碎与传播特性的模型试验研究【作者】王恺 【导师】左其华
【作者】王恺 【导师】左其华
【作者基本信息】南京水利科学研究院，港口、海岸及近海工程，2008年，硕士
【中文摘要】 潜堤是一种常见的护岸工程结构物,广泛的应用于护岸、保滩促淤、围海造田以及防浪导流等海岸工程中。目前国内外对潜堤的研究虽然很多,研究的成果也较丰富,但由于潜堤的型式很多,在实际工程设计中很多时候还需要借助于物理模型试验,尤其是波浪在潜堤上的传播和破碎研究尚不充分,仍有进一步的研究的必要。本文以梯形断面的抛石潜堤为研究对象。采用物理模型试验的方法,首先研究了规则波在潜堤上的临界入射波高、破碎波高和破碎位置;其次,通过对各个影响因次的逐个分析,得到了规则波经潜堤传播的透射系数、反射系数的变化规律和经验公式,同时给出了波浪在潜堤附近传播的沿程波高变化情况;最后,本文尝试将规则波的研究成果应用在不规则波的潜堤传播中,给出了透射系数公式在不规则波的情况下的应用方法。
【英文摘要】 Submerged dike is a common offshore structure, which is widely used for coast protection, beach preserving and silt promoting, sea enclosing and land making, wave defending and current leading and so on. Although, a lot of research studies have been done upon such a problem home and abroad and lots of the accomplished results are available. However, because there are many types of the submerged dike, in the real projects and most cases, it still depends on the results of physical model experiments. Especially the researches of the wave transmission and wave breaking over the submerged dike are still not enough, a perfect result is expected to get for the practice in this paper.This paper studies upon the trapezoidal-type submerged rubble dike. Through the physical model experiment, the critical incident wave height over the submerged dike, the breaker height and the break point are analyzed under the action of regular wave. Then through analyzing the main factors, the empirical formula...更多s of transmission coefficient and reflection coefficient are derived. In the mean time, the conditions of the changes of wave height around the submerged dike are given. At last, the research results of the regular wave are applied in the condition of irregular wave, and the applying method of the formula of transmission coefficient in the condition of irregular wave is given. 还原
【中文关键词】 潜堤; 规则波; 不规则波; 波浪破碎; 透射系数; 反射系数
【英文关键词】 submerged dike; regular wave; irregular wave; wave breaking; transmission coefficient; reflection coefficient
