基于数值模拟的非线性波浪在直立墙上爬高的研究  

Study of nonlinear wave run-up on a vertical structure based on numerical simulation

作　　者：张少华 马玉祥[1] 艾丛芳[1] 董国海[1] ZHANG Shao-hua;MAYu-xiang;AI Cong-fang;DONG Guo-hai(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116023,China)

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,大连116023

出　　处：《水动力学研究与进展（A辑）》2020年第5期575-583,共9页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(51679031,51720105010,51979029);辽宁省“兴辽英才”计划(XLYC1807010);中央高校基本业务费(DUT2019TB02)。

摘　　要：在海洋和近海工程中,波与波相互作用或波与结构相互作用而产生的极端波浪爬高,严重威胁着海洋工程建筑物的安全。该文基于一个非静压数值波浪模型建立了三维波浪数值水池,对非线性波浪作用下直立结构物上的波浪爬高进行了研究。结果表明,不同水深、不同波陡的规则波与直立板相互作用时,波浪爬高在直立板上的分布差异较大;波浪振幅放大率,即波浪爬高与入射振幅的比值,随着波陡以及水深的增大而增大,并且最大放大率从直立板中心处逐渐移向板墙交界处;波浪振幅放大率最大达到4.0,远大于线性理论预测值2.0。In marine and coastal engineering,it is necessary to take into account of wave/wave interaction and wave/structure interaction,which can induce very large run-up that is a threatening of the safety of marine and coastal structures.A three-dimensional numerical wave tank based on a fully non-hydrostatic wave numerical model is established,to study run-up of nonlinear waves on a vertical structure.Regular waves with different steepness in a wide range of water depths are generated to interact with a vertical plate.It is found that the variations along the structure are discrepant in different wave steepness and water depths.The amplitude amplification,i.e.,the ratio of wave run-up to incident amplitude,increases with the increase of wave steepness and water depth.The maximum amplitude amplification gradually moves from the center of the vertical plate to the plate-wall intersection with the increase of wave steepness and water depth.The largest wave surface elevations at the weather side can reach up to about 4 times of the incident waves,much larger than the 2 times predicted fr om linear theory.

关 键 词：非静压数值波浪模型 非线性波浪爬高 波与波相互作用 

分 类 号：TV139.2[水利工程—水力学及河流动力学]