海浪的数值模拟及预报

Numerical Simulation and Prediction of Ocean Wave

海浪作为关键的海洋环境要素,其数值模拟精度关系着能否逼真地再现海上环境。在对非规则波浪数学模型进行研究探讨的基础上,选用ITTC双参数谱作为输入的波浪谱,利用波浪的实测谱,分别设计出长峰非规则波、短峰非规则波的数值模拟方案,运用CFD方法对海浪进行模拟和预报,提出了高精度的非规则波数值模拟方法,并对此造波方式的造波精度展开了分析。仿真结果表明,该方法能得到稳定性良好、精度较高的波浪。

Ocean wave is one of the most typical marine environment factors. Its simulation precision has relation to reconstructionof marine environment with reality. In this paper, firstly defining inlet boundary wave generation, the mathmodel of irregular wave is discussed. Secondly the ITTC two-parameter spectrum is selected as the power spectrum of seawave to be simulated. On the basis of the measured spectrum, the simulation scheme is designed for the long-crested irregularwaves and the short-crested irregular waves. This paper puts forward a new simulation method by using the CFD, and anew alternate generating wave precision method is presented. The results showe that this method is a high precision methodto irregular wave, and has a stable wave shape.