长峰不规则波数值模拟的相关问题

针对波浪数值水池研究现状,提出了长峰不规则波数值波浪水池研究亟待解决的3个问题:海浪谱的拓展、波能衰减机理讨论及长峰不规则波数值模拟精度评价标准.基于黏性数值波浪水池技术,以文氏海浪谱为目标谱,对深水长峰不规则波进行了数值模拟;分析了数值模拟中波能衰减的主要原因,并提出了基于优化网格生成和离散格式的减小衰减的方法;根据《水面船模耐波性试验规程》对数值模拟结果进行了误差计算,并提出了适用于不规则波数值模拟评价标准的建议.

On numerical simulation of long-crested irregular waves

In view of the present status of numerical simulation of the wave tanke,three important problems of simulating long-crested irregular waves are presented in this paper: wave spectrum expansion,discussion on waves’ attenuation mechanism and an evaluation criteria for numerical simulation accuracy of the long-crested irregalar waves.The Wen Shengchang spectrum is taken as a target.The long-crested irregular waves are reproduced by using the viscous numerical wave tank simulation technique.The main causes of waves’ attenuation in numerical simulation are analyzed,and the factors affecting the attenuation are got in the study.The relative errors of numerical simulation are calculated by using the standard of CB/T 3675-1996.The evaluation criteria for simulating long-crested irregular waves are thus proposed.