基于虚长度法的高速双体船兴波阻力预报  

The Prediction of Wave Resistance of High-Speed Catamarans Based on Virtual Appendage Models

作　　者：李志恒[1] 陈庆任[2] 祝海勇[1] 郑立捷[1] 

机构地区：[1]中国舰船研究设计中心,湖北武汉430064 [2]中国船级社武汉规范研究所,湖北武汉430022

出　　处：《中国舰船研究》2013年第2期41-45,共5页Chinese Journal of Ship Research

基　　金：国家部委基金资助项目

摘　　要：应用经典薄船理论,以Michell兴波阻力积分公式为基础,针对高速船的方尾船型特点,采用"虚长度"法,即在方尾后增加一个虚拟附体以使尾部封闭,通过对NPL船模系列(包括3b,4a,4b,4c,5a,5b,5c,6a,6b,6c共10条船型)的文献数据进行分析,总结得到一个计算虚长度的公式,同时对代号分别为4a,5c,6b的3种船型的兴波阻力进行数值计算,并与文献中的实验数据进行比较。研究表明,3条双体船型的计算结果与实验数据在趋势上吻合较好,在高傅汝德数下误差小于6%,符合工程应用要求。An improved numerical method for calculating the wave resistance of catamarans has been pre- sented, based on the classical thin-ship theory and the Michell＇ s wave resistance integral, which assumes a virtual appendage at the transom stern to seal it off. A formula for calculating the re-attachment length is obtained by analyzing the NPL high speed hull series. To validate the proposed model, a comparison is made between three NPL ship models, 4a, 5e and 6b, and the corresponding numerical results and experi- mental data. The result reveals good correlation, and the calculation error was found to be less than 6% at high Froude number, which indicates that the method is practical and effective for engineering applications.

关 键 词：虚长度 高速双体船 方尾 兴波阻力 

分 类 号：U661.311[交通运输工程—船舶及航道工程]