带支腿浮式结构水动力系数快速算法研究  

Efficient algorithm of hydrodynamic coefficients for floating structure with legs

作　　者：武海浪[1] 陈徐均[1] 黄亚新[1] 沈海鹏[1] 苗玉基 WU Hai-lang;CHEN Xu-jun;HUANG Ya-xin;SHEN Hai-peng;MIAO Yu-ji(College of Field Engineering,PLA University of Science and Technology,Nanjing 210007,China)

机构地区：[1]解放军理工大学野战工程学院,南京210007

出　　处：《船舶力学》2018年第11期1376-1386,共11页Journal of Ship Mechanics

基　　金：国家自然科学基金(51379213);国家工信部高性能船舶科研项目(工信部联装[2012]533);国家科技支撑计划课题(2014bab16b05)

摘　　要：文章在三维线性水弹性理论体系下,利用格林函数矩阵的性质,将桩腿不断抬升的过程视为格林函数矩阵规模减小的过程,以此为核心,针对带支腿浮式结构变参数的水动力系数计算问题提出了一种相对较高效的计算方法。通过算例的分析对快速算法计算结果的误差和效率进行了全面的考察。结果表明:使用格林函数矩阵缩减为核心的快速算法进行分析以后,计算效率可以提高92%以上;快速算法所计算的刚体的纵荡、横荡和艏摇三种水动力系数与普通算法结果一致,可完全反应这些模态的水动力特性;快速算法所计算的垂荡、横摇和纵摇三种刚体模态的结果与普通算法有较小的误差,但基本可以反应这些模态的水动力特性。Based on the 3 dimensional linear hydroelastic theory and the properties of the Green function matrix,an efficient algorithm is proposed for the hydrodynamic coefficients calculation of the floating structure with legs.The core of the efficient algorithm is that the process of the legs raising up continuously can be seen as the correspondingly rows and lines of the Green function matrix quit from the calculation.A study case’s hydrodynamic coefficients of floating structure with legs are calculated by both traditional method and new method.Accuracy and efficiency of the new method are checked.The results show that the new method can improve the computing efficiency more than 92%.To the motion of surge,sway and yaw,there is no difference between the two types of results,however,to the motion heave,roll and pitch,the accuracy of the hydrodynamic coefficients is relatively lower.

关 键 词：海洋工程 带支腿浮式结构 水动力系数 快速算法 

分 类 号：U661.1[交通运输工程—船舶及航道工程]