数值二维随机波浪水槽的建立和应用  

Development of 2-D Numerical Random Wave Tank and Its Application

作　　者：李本霞[1] 俞聿修[2] 张宁川[2] 

机构地区：[1]清华大学水利水电工程系,北京100084 [2]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116024

出　　处：《海洋通报》2004年第5期1-9,共9页Marine Science Bulletin

基　　金：国家自然科学基金资助项目(50079001)的部分成果

摘　　要：利用域内源造波和边界海绵层吸波的思想,建立了基于势波理论的具有良好适应性的二维随机波浪数值水槽。垂向采用σ-坐标变换,将随时间变化的不规则物理域变为不随时间变化的规则计算域,有利于不规则自由表面条件和底面条件的“严格”满足。数值试验表明,本数值模型可连续地产生理想的规则波和随机波而不受建筑物产生的反射波的影响,计算所得直立堤上的随机波浪力与试验结果吻合较好。A two-dimensional numerical random wave tank based on the potential theory is developed. A source term is used inside the domain to generate waves, and outgoing waves are dissipated by sponge layers. In order to satisfy the free surface and bottom boundary conditions exactly, σ -coordinate transformation is introduced to map the time-dependent irregular physical domain to a fixed regular one. Numerical tests show that regular and random waves can be continuously generated without being affected by the reflected waves from structures, and random wave forces acting on the vertical wall agree well with the experimental results.

关 键 词：随机波浪 数值水槽 源造波法 海绵层 σ-坐标变换 势波理论 

分 类 号：TV139.221[水利工程—水力学及河流动力学] TV139.16