多向随机波作用在直立堤上的波浪力  

Multi-directional random wave forces acting on vertical breakwaters

作　　者：李本霞[1] 俞聿修[1] 张宁川[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室

出　　处：《大连理工大学学报》2004年第4期575-581,共7页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(50079001).

摘　　要：通过三维随机波浪对直立堤作用的试验研究,分析了单位堤长上波浪力的变化规律,着重研究了主波向角和波浪方向分布对波浪力的影响,发现波浪入射角小于45°时,波陡较小的单向波作用力随波向角呈明显的增大趋势.给出了波浪力沿堤长的纵向分布,以及单元堤上波浪力纵向折减系数的计算公式;建议了2种计算斜向波和多向波作用在整个单元堤上最大总波力的方法,可供理论研究和工程设计参考应用.A 3-dimensional experimental investigation has been carried out to study the effect of multi-directionality on wave forces acting on vertical breakwaters. The variation of horizontal and uplift forces exerted on the unit length of breakwater with principal wave direction and wave multi-directionality is studied, and it is concluded that the measured unidirectional wave forces acting on the unit length of a breakwater increase with increasing obliquity as θ0 &le 45° for smaller wave steepness. The longitudinal distribution of wave forces and the longitudinal load reduction are studied, and the empirical formulae calculating the longitudinal distribution coefficient and the longitudinal load reduction factors are given. Two methods are presented to calculate the maximum total wave load acting on the unit breakwater for theoretical study and practical use.

关 键 词：直立堤 多向随机波 波浪力 纵向分布 纵向折减 斜向波 

分 类 号：TV139.26[水利工程—水力学及河流动力学]