本项目通过物理模型实验和数值模拟方法研究马蹄波的生成机理和运动规律，研究内容包括：1）不同水深对马蹄波特性的影响；2）振荡型马蹄波的生成机理和运动规律；3)瞬变马蹄波的产生机理和运动规律；4）Benjamin & Feir(1967)第一类不稳定性对马蹄波的生成和运动规律的影响；5）海面风场对马蹄波的生成和演化的影响；6）马蹄波对圆柱体等海洋结构物的作用；7）马蹄波的数值模拟方法。物理模型实验将在55m长、34m宽波浪水池进行，利用水池的较大的长和宽的尺度，给波浪充分演化的空间和时间，研究在这样水池中马蹄波的生成方法和运动规律。数值模拟将研究计算效率高的高阶Boussinesq方程，该方程在色散性和波幅离散性方面已经获得了提高。以及该计算模型与物体附近区域的三维势流计算模型相耦合。本项目将通过对马蹄波的数值模拟，和将计算结果与实验结果进行对比，进一步研究各种类型马蹄波产生机理和运动规律。

This research project investigates the generarion and evolution mechnism of crescent wave experimentally and numerically. Wave pressure on a fixed body produced by crescent waves is also concerned in the study.The focus of the research includes: (1)The effect of finite water depth on the generation and evolution of crescent wave. (2) The generation mechnism of oscillating crescent wave. （3）The generation mechnism of transient crescent wave.(4)The interaction between Benjamin & Feir instability and crescent wave.(5)the effect of wind blowing on the generation and evolution of crescent wave.(6)The wave force on a body produced by crescent waves.(7) The numerical simulations of crescent waves..A series of experiments on generation and evolution of crescent waves of diferent types will be performed in a large wave flume with the focus mentioned above.The mathematical model based on higher-order Boussinesq equations will be developed to simulate the crescent waves produced in the physical experiment. Its coupling with the three dimensional wave model based on potential theory will be adopted to simulate the wave action on a body. The new results to be obtained include the critical wave steepness for triggering crescent waves, the characteristics of the wave surface pattern and amplitude spectrum, and the parameters of surface elevation.