坡度对波浪统计特征的影响  

Influence of slope on wave statistical characteristics

作　　者：林子淳 柳淑学[1] 李金宣[1] 罗丽 LIN Zi-chun;LIU Shu-xue;LI Jin-xuan;LUO Li(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,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

出　　处：《水运工程》2019年第8期27-33,40,共8页Port & Waterway Engineering

基　　金：国家自然科学基金项目(51879037、51739010、51490672)

摘　　要：为了明确坡度对不同波浪统计特征的影响,利用数值模型对波浪在不同坡度斜坡上的传播进行模拟,分析波浪的非线性参数和波高分布等,比较不同坡度下波浪的传播特性。结果表明,在相同条件下,随着波浪在斜坡地形上传播,波高会随着水深的变浅逐渐增大;坡度对于波浪的波高分布具有较大影响,当坡度较大时,波浪传播至斜坡较浅水深时的波高分布接近瑞利分布,当坡度逐渐减小时,相同波高的发生概率逐渐减小;而Ursell参数则不会随着坡度的变化有明显的变化。In order to clarify the influence of slope on different wave statistical characteristics,we simulate the wave propagation with different slopes by numerical model,analyze the nonlinear parameters and wave height distribution,and compare the propagation characteristics of waves under different slopes.The results show that under the same condition,wave height will increase with the wave propagation on the slope when the water depth becomes shallow gradually.Slope has a great influence on the wave height distribution.When the slope is steep,the wave height distribution is close to the Rayleigh distribution with the wave propagation to the shallow water.When the slope becomes gentle gradually,the probability of the same wave height decreases.However,the Ursell number does not change significantly with the change of slope.

关 键 词：不规则波 坡度 传播特性 波高分布 

分 类 号：P751[交通运输工程—港口、海岸及近海工程] U656[天文地球—海洋科学]