阶梯式海堤波浪爬高影响因素的数值模拟分析  

Numerical simulation analysis on influencing factors of wave run-up on stepped seawall

作　　者：张小飞[1] 韦凯曼 胡瑞昌[1] 骆文广[2] 蔡伟霞[1] 

机构地区：[1]广西大学土木建筑工程学院,工程防灾与结构安全教育部重点实验室,广西南宁530004 [2]武汉大学水利水电学院,水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《广西大学学报（自然科学版）》2016年第6期1789-1796,共8页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51069001)

摘　　要：为了研究阶梯式海堤波浪爬高的影响因素,基于质量源造波法建立数值模拟水槽,采用二阶Stokes波的粘性学理论数学模型模拟波浪,分析了堤前水深、海堤坡度、台阶高度以及来波波坦等因素对阶梯式海堤波浪爬高的影响。分析结果表明,阶梯式海堤波浪爬高随着复合参数d/L的增加而减少,随着海堤坡度变缓而减小,而随着波坦的增加先增加后减小;在同一海堤坡度、波坦的条件下,阶梯式海堤波浪爬高随着台阶高度的增大呈减小趋势,在达到最小爬高值后稍有增大;相对平面斜坡式海堤而言,阶梯式海堤对波浪爬高具有明显的折减效果。总体上,堤前水深小、海堤斜坡缓且台阶高度高的阶梯式海堤削减波浪爬高效果好。研究结果可为海岸防浪实际工程应用提供参考。In order to study the influencing factors of wave run-up on stepped seawalls,a numerical wave flume was established based on the mass source method,and the second-order Stoke wave mathematical model was used to simulate waves. The influencing factors of wave run-up on stepped seawall,including the water depth in front of the dike,seawall slope,height of the steps and wave smoothness,were analyzed. The results show that the wave run-up on stepped seawalls decreases with the increase of composite parameters d / L and becomes smaller following the seawall slope. With the increase of the step height,the wave run-up decreases first and then increases. With the increase of wave smoothness,the wave run-up increases first and then decreases. Under the same seawall slope and wave smoothness,wave run-up on stepped seawalls decreases with the increase of the stepheight and increases slightly when it reaches the minimum value. Stepped seawalls are more effective than flat sloping seawall on the reduction of wave run-up. On the whole,stepped seawalls with small water depth in front of the dike,gradual descent seawall slope and high step height have a better effect on run-up reduction. The results of the research can provide reference to wave resistance in coastal engineering.

关 键 词：阶梯式海堤 数值波浪水槽 质量源法 波浪爬高 

分 类 号：TV39[水利工程—水工结构工程]