海洋中不仅存在波浪，也存在背景流，波流相互作用一直是国际上研究的热点。目前国际上对波浪与均匀流的相互作用研究较多，对于周期性规则波与剪切流的研究较少，对于不规则波与剪切流的研究更属于国际空白，然而海洋中主要是不规则波和剪切流，因此这方面的研究更具实际意义，可以为海洋结构物的安全设计提供科学的波流环境。本项目采用高级别层析波浪理论对波浪和剪切流的相互作用进行研究。首先开发波浪与剪切流的高效模拟方法，研究规则波与线性剪切流的相互作用的波形和速度场，研究规则波与非线性剪切流的相互作用的波形、速度场和涡量场，研究不规则波与剪切流相互作用时的波能谱变化。最终，探明波浪与剪切流的相互作用机理，也为船舶和海洋平台等海洋结构物的安全设计提供科学的波流环境。

There are not only water waves in the ocean, but also background currents. Wave-current interaction has always been a hot topic in international research. At present, there are more studies on the interaction between waves and uniform currents in the world, less on periodic regular waves and shear currents, and none on irregular waves and shear currents. However, irregular waves and shear currents are dominant in the ocean. Therefore, the research in this area has more practical significance and can provide a scientific wave and current environment for the safe design of marine structures. In this project, the interaction between waves and shear currents is studied by using high-level fluid sheet wave theory. Firstly, an efficient simulation method of waves and shear currents is developed. Secondly, the wave profiles and velocity field of interaction between regular waves and linear shear currents are studied. Thirdly, the wave profiles, velocity field and vorticity field of interaction between regular waves and non-linear shear currents are studied. In the end, the change of energy spectrum of interaction between irregular waves and shear currents are studied. Finally, the interaction mechanism between waves and shear currents is explored, and a scientific wave and current environment is provided for the safe design of marine structures such as ships and offshore platforms.