基于分层Boussinesq方程的波浪通过斜坡上潜堤传播变形  

Wave propagation over a submerged breakwater on a sloping bed using a layered Boussinesq equation

作　　者：陈杰[1,2] 蒋昌波[1,2] 隆院男[1] 邓斌[1] 

机构地区：[1]长沙理工大学水利工程学院,湖南长沙410004 [2]湖南省水沙科学与水灾害防治重点实验室,湖南长沙410004

出　　处：《长沙理工大学学报（自然科学版）》2009年第3期40-46,共7页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(50479015);教育部新世纪优秀人才支持计划资助项目(NCET-05-0710)

摘　　要：在总结前人研究工作的基础上,运用分层Boussinesq方程对波浪通过斜坡上潜堤传播变形开展数值模拟研究.利用试验数据验证了二层Boussinesq方程波浪模型在该研究中具有很好的适用性和较高的精度.研究结果表明,相对堤顶水深和相对堤顶宽度对波浪外观形态和内部能量影响很大;相对堤顶水深越小,相对堤顶宽度越大,波形变换越显著,堤后波浪主频能量减少越剧烈.Accurate estimation and prediction of wave deformation around a submerged breakwater are researched. Characteristics of changes of the wave profile and energy spectrum at different relatively depth of submergence and different relatively crest width of submerged breakwater under regular wave passing over a submerged breakwater installed on the 1/20 sloping bed are investigated by a two-layer, depth-integrated Boussinesq model. The proposed numerical model is examined by comparison with the experimental results. The numerical result shows that the wave profile may become more asymmetry when wave propagates over breakwater. Wave energy may rapidly decrease at the breakwater because turbulent dissipation increases and the energy in lower harmonics are transferred into higher harmonics. The results show the lower the relative depth of submergence or wider the relative crest width of submerged breakwater is, the more asymmetry the wave profile is and the more the relative fundamental energy decreases.

关 键 词：分层Boussinesq方程 潜堤 斜坡 数值模拟 

分 类 号：P731.22[天文地球—海洋科学] TV139.2[水利工程—水力学及河流动力学]