摘要
船舶在波浪中的失速系数fw是新造船舶能效设计指数EEDI公式中的一个重要参数,它的计算方法是当前的一个热点。考虑到真实海浪常呈现三维特性,采用了国际海事组织(IMO)的GHG会议进展中推荐的频率谱以及ITTC建议的方向扩展函数,分析研究长峰不规则波与短峰不规则波对船舶失速的影响。计算结果表明,长峰不规则波与短峰不规则波中船舶增阻是有差别的,从而对fw也产生一定的影响。
Coefficient fw for the decrease of ship speed is one of the important parameters in energy efficient design index （EEDI） for new ships. Research on its calculation method is a hot point now. Considering 3D characters of real seas, the frequency spectrum and the angular distribution function, recommended by IMO and ITTC respectively, are adopted to analyze the influence of long-crested and short-crested irregular waves on the decrease of ship speed. The results show that the added resistance due to long and short-crested waves are different, which effect the fw in some extent.
出处
《中国造船》
EI
CSCD
北大核心
2012年第A01期13-18,共6页
Shipbuilding of China
关键词
失速系数
EEDI
长峰不规则波
短峰不规则波
decrease of ship speed
EEDI
long-crested irregular wave
short-crested irregular wave
