栅栏板护面对斜坡堤堤顶越浪流厚度分布的影响  

Effects of Fence Panels of Sea Dikes on Water Layer Thickness of Wave Overtopping

作　　者：朱伟娜[1] 吴卫[1] 房詠柳[1,2] 刘桦[1,2] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]水动力学教育部重点实验室,上海200240

出　　处：《力学季刊》2012年第2期174-180,共7页Chinese Quarterly of Mechanics

基　　金：上海市科委重点科技攻关专项(09231203402);上海市自然科学基金(11ZR1418200);海洋工程国家重点实验室自主研究课题(GP08010604)

摘　　要：采用高速摄像技术和流动显示技术,在波浪水槽中进行了光板斜坡堤和带栅栏板斜坡堤堤顶越浪流水动力参数实验研究。光板、栅栏板两种条件下,以堤顶前缘越浪流厚度为特征量的堤顶流相对厚度实验结果与现有经验公式均较为吻合,沿堤顶宽度方向呈负指数衰减。实验结果显示,当堤面栅栏板在静水面以上的高度较小时,堤顶前缘越浪流厚度随来波特征波陡和海堤超高的关系与光板条件下得到的经验预报公式一致;当堤面栅栏板在静水面以上的高度较大时,堤顶前缘越浪流厚度明显小于光板海堤的预报值。By using the high-speed camera and flow visualization approach, a physical model experiment was designed to study hydrodynamic parametes of overtopping flows on the crest. For the cases of sea dikes with and without fence panels, the measured layer thickness on the crest decrease exponentially in term of the distance along the crest, which accords with the results predicted by the empiric formula based on the shallow water equation. For the case of the fence panels, the experimental results show that the layer thickness at the leading edge of the dike crest is consistent with the empiric formula in terms of the wave steepness and freeboard levels when the height of fence panels above the still water level is small. However, the measured value is obviously smaller than the values calculated with of the empiric formula if more fence panels are placed on the sea dikes above the still water level.

关 键 词：规则波 堤顶流厚度 物理模型实验 

分 类 号：O352[理学—流体力学] TV131.2[理学—力学]