波浪荷载对半圆型潜堤作用的数值分析  

Numerical analysis of wave load on a submerged semi-circular breakwater

作　　者：胡宝琳[1,2] 姚文娟[1,2] 刘逸敏[1] 熊胜[1] 

机构地区：[1]上海大学土木系,上海200072 [2]上海市应用数学与力学研究所,上海200072

出　　处：《水利水运工程学报》2013年第3期38-44,共7页Hydro-Science and Engineering

基　　金：上海大学创新基金项目(A10-0118-12-002)

摘　　要：基于动量源数值造波原理,运用Fluent软件模拟了半圆型潜堤表面波压的分布及变化规律,采用π定理分析了波陡、水深及波长对半圆型潜堤表面波浪力的影响,并通过统计潜堤表面各点所受压力(最大波压力与最小波压力的差值)最大值的分布,给出了半圆型潜堤表面压力最大值出现的位置及概率.分析结果表明,在水深较深时,波陡的改变会使波压力在堤顶至背浪侧发生明显变化;水深波长比的改变,会引起半圆堤两侧波压力不同的变化;波压力的最大值一般发生在堤顶处及其偏向背浪侧附近;半圆堤面上的动波压力最大值主要出现在两侧堤脚附近,随着波高的增加,堤面上各点的动波压力由近似对称分布向两侧受力不同转变.Submerged semi-circular breakwaters are widely used in the port engineering. The numerical wave generation method based on the theory of momentum source by using fluent simulation is adopted in the study of the changing laws and distribution of the wave pressures on the surface of submerged semi-circular breakwater. By means of the π theorem, the effects of wave steepness, water depth, and wave-length on the amplitude of wave pressures on its surface are analyzed. Besides, through the statistics, the position and occurring probability of the maximum amplitude of the wave pressure on the surface of the semi-circular breakwater are given in the study. The analysis results show that the wave steepness has a large influence on the changing trendency of the amplitude of the wave pressure at the crest and back sea side of the breakwater. The amplitude of the wave pressure at both sides of the submerged semi-circular breakwater is different with different relative depths. The maximum amplitude of the wave pressure generally occurs at the crest or nearby the back sea side. The maximum dynamic wave pressures mainly occur at two bottom-toes of the semi-circular breakwater. With the increasing of wave height, the distribution of dynamic wave pressure on the surface of the semi-circular breakwater changes from symmetric distribution to asymmetric distribution.

关 键 词：数值造波 半圆型潜堤 波压力 π定理 

分 类 号：U656.24[交通运输工程—港口、海岸及近海工程]