海底斜坡面波压力分布特征的数值模拟研究  

Numerical simulation of wave pressure at submarine slopesurface under progressive waves

作　　者：朱飞扬 刘小丽[1,2] ZHU Feiyang;LIU Xiaoli(College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China;Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering,Qingdao,266100,China)

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100 [2]山东省海洋环境地质工程重点实验室,山东青岛266100

出　　处：《海洋湖沼通报（中英文）》2024年第5期21-27,共7页Transactions of Oceanology and Limnology

基　　金：国家自然科学基金(42077237,41741016);山东省自然科学基金(ZR2020MD110)。

摘　　要：波浪作用导致的斜坡失稳会威胁到近海工程的安全,斜坡面上的波压力分布直接影响着斜坡的稳定性。利用基于有限体积法的水动力数值模型,模拟了行进波在斜坡地形上的传播过程,在验证模型正确性的基础上,进一步分析了水深、波高及周期对不同坡度的斜坡面上波压力分布特征的影响。结果分析表明,行进波沿斜坡面传播过程中,水深越小,波高越大,周期越长,破波前斜坡面上的波压力越大;在波浪发生破碎的条件下,水深越小,周期越短,波高和坡度越大,波浪的破碎区越靠近来波方向;缓坡条件下(3°~9°),波压力最大值相较坡底处可增加20%~80%;破波前的波压力沿斜坡面呈非线性增加趋势,波浪破碎可使斜坡面上的最大波压力相对于坡底波压力的增加率扩大约1.2~1.3倍;波浪破碎后的波压力显著降低,且其数值可能会小于坡底处的波压力。Wave-induced slope instability can threaten the safety of offshore engineering.The wave pressure distribution at the slope surface directly influences the slope stability.The hydrodynamic numerical model based on the finite volume method was used to simulate the propagating process of progressive wave over submarine sloping bed.After validation of the numerical model,the influence of water depth,wave height and wave period on the characteristics of wave pressure distribution at slope surface was further investigated.The results showed that the smaller water depth,the larger wave height,and the longer wave period would lead to larger wave pressure on the slope prior to wave breaking.For the case of wave breaking,the smaller water depth,the shorter wave period,and the larger wave height and inclination of the slope could cause the wave breaking zone moving toward the offshore.For gentle slopes with an inclination angle of 3°~9°,the maximum wave pressure might increase by 20%~80%of that at the bottom of the slope.The wave pressure before wave breaking increases nonlinearly over the sloping bed,and the increased ratio of the maximum wave pressure to that at the bottom of the slope might be enlarged by 1.2~1.3 times due to wave breaking.The wave pressure decreased significantly after wave breaking,and its value might be smaller than that at the bottom of the slope.

关 键 词：海底斜坡 波浪 波压力 数值模拟 波浪破碎 

分 类 号：P753[交通运输工程—港口、海岸及近海工程]