内波在岸坡地形上的传播特性研究

Research on the propagation characteristics of internal waves over banked terrain

在稳定的分层流体系统中,外界轻微的扰动可能会在密度分层面(密度跃层)处引发内波现象。内波是周期短、波幅大、携带能量巨大的一类非线性波浪。海岸带为海陆之间相互作用的地带,是陆地和海洋的分界线。岸坡则是指海岸带的水下部分,一般可概化为斜坡。内波在岸坡上传播时,波形、传播特性、能量都与平坡环境差别极大。在此类近岸及河口复杂的水动力环境,内波更易对水下结构物造成巨大威胁。因此,研究内波在岸坡上的传播特性对维护水上建筑物安全稳定具有重要意义。文章对国内外学者的内波相关研究进行整理,具体对内波主要研究方法、内波在岸坡上传播特性这两大方面的研究成果进行总结。

A slight external perturbation may trigger the phenomenon of internal waves(IWs)at the density stratification level.The slope is the submerged portion of the coastal zone,which can generally be generalized as a slope.When IWs propagate on a slope,the waveforms,propagation characteristics,and energies are very different from those of a flat slope.IWs are more likely to pose a significant threat to submerged structures.Therefore,it is of great significance to study the propagation characteristics of IWs on bank slopes to maintain the safety and stability of water buildings.In this paper,the IW related research of scholars at home and abroad is organized,and the research results in two aspects,namely,the main research methods of internal waves and the propagation characteristics of IWs on bank slopes,are summarized.At the end of the paper,the research related to IWs is summarized.