摘要
为了研究三体船操纵特性,采用势流理论有升力三维面元计算方法,计算和分析了三体船斜航下的有关操纵运动水动力.在物体表面和尾涡面上布置均匀涡环网格,通过满足物面边界条件和库塔条件,计算物体对流场的扰动速度,进而确定物体受力并分析其规律.在对NACA0012机翼压强分布和单体船模水动力随漂角变化规律验证的基础上,将所提方法推广至三体船在斜航运动时受到的横向力和转首力矩计算.据计算结果,分析了三体船侧体位置对其斜航下操纵运动水动力和操纵运动特性的影响.研究表明,文中计算结果具有较高的准确性和合理性,所提势流理论三维面元计算方法为三体船操纵运动水动力预报和三体船操纵运动特性分析奠定了基础,具有较高的工程应用价值和很好的工程应用前景.
This paper presented research on a trimaran＇s maneuverability.The trimaran＇s maneuvering hydrodynamics were calculated and analyzed with a trimaran sailing under a drift angle by using a three-dimensional surface panel method of potential flow with lift.The vortex loops were deposited on the trimaran hull surface and the related wake vortex surface,and then the perturbation velocity was solved under the hull surface condition and the stern edge Kutta condition,based on which the trimaran hull hydrodynamics were obtained and discussed.The surface pressure coefficient of NACA0012 foil and the hydrodynamics of a single ship hull with a drift angle were calculated and they were taken as two calculation samples to validate the reliability of the presented method,and then the lateral force,yawing moment,and relevant hydrodynamic coefficients of a trimaran were further calculated as the 3rd calculation sample.According to the calculation results,the outrigger position influence on the related maneuverability hydrodynamic coefficients of a trimaran was analyzed systematically.The results show a high reliability and accuracy of the presented three-dimensional surface panel method in terms of the potential flow with lift in the trimaran maneuverability performance prediction and analysis.This paper is of great significant to engineering application.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2012年第5期642-647,共6页
Journal of Harbin Engineering University
基金
海洋工程国家重点实验室基金资助项目(0812)
关键词
船舶操纵性
三体船
面元法
机翼理论
位置导数
转首力矩
ship maneuverability
trimaran
surface panel method
hydrofoil theory
position derivatives
yawing moment
