不同结构形式潜堤上的随机波浪运动  

Random Wave Motions Around Different Submerged Dykes

作　　者：李昌良[1] 谢媛媛[1] 

机构地区：[1]中国海洋大学工程学院,山东青岛266100

出　　处：《海岸工程》2008年第1期1-9,共9页Coastal Engineering

基　　金：国家杰出青年基金--各类水工建筑物品动力分析(50325927)

摘　　要：潜堤在海岸保护和促滩保淤中具有重要的意义。工程效益和经济投入受到潜堤结构形式和高度的影响。基于RANS方程和流体体积(VOF)方法的模型,计算不同潜堤上的波浪运动。潜堤形式包括矩形结构、梯形结构、半圆结构和槽形结构。模拟了不规则波越堤时波浪的破碎特征、破波类型以及波高的变化。通过分析流场和波高分布的变化,得到潜堤上波能散耗的规律,并且得出最优潜堤结构形式。讨论了相对堤顶高度、破碎点位置、相对堤顶宽度、波陡和潜堤结构形式等对波能耗散的影响。The submerged dyke plays an important role in protecting bank and promoting beach accretion, and the project benefit and economic input of submerged dyke are affected by its structural form and height. In this paper,the RANS equations and volume of fluid （VOF） method are used to compute the wave motions around different sub- merged dykes, and the structural forms of submerged dyke include rectangular struc- ture, trapezoidal structure, semicircular structure and fluted structure. The characteristics of wave breaker around submerged dyke, wave breaker types and changes in wave height of random wave travelling over the submerged dyke are simulated. The wave energy dissipation regularities at the submerged dyke are obtained by analyzing the changes in current field and wave height distribution, and the optimal structural form of submerged dyke is given. The effects of relative freeboard, breaking point position, relative dyke crest width, wave steepness and structural form of submerged dyke on wave energy dissipation are also discussed.

关 键 词：潜堤 结构形式 波浪破碎 破波类型 透射系数 相对堤顶高度 

分 类 号：U656.3[交通运输工程—港口、海岸及近海工程]