摘要
以粘性流场中船舶操纵水动力预报为研究背景,通过对商用计算流体力学软件FLUENT的二次开发,采用其动网格技术以及后处理系统,对大型船舶的线性水动力导数进行了数值计算.考虑变舵角、斜航、纯横荡、纯首摇运动状态,得出随船坐标系下作用于操纵运动船体的水动力及力矩,并对之采用最小二乘法进行曲线拟合得到船舶操纵运动的线性水动力导数,数值计算结果与理论估算值吻合.稳定的计算结果表明该方法可用于复杂船舶运动的水动力导数计算.
In order to predict the ship maneuverability in viscous flows, linear hydrodynamic derivatives related to ship maneuvering were analyzed using a dynamic mesh method and post-processing system, which was based on the commercial software FLUENT. Ship maneuvering motions of the different heading angles, rudder angles, swaying and yawing are considered. Hydrodynamic forces and moments acting on a maneuvering ship are obtained in the body-fixed coordinate system. Thus linear hydrodynamic derivatives of the ship maneuvering motions are calculated by least square curve fitting. Numerical calculation results accorded with the theory values very well. The stable computational results show that this method can be used to calculate the hydrodynamic derivatives of ship complicated motions.
出处
《中北大学学报（自然科学版）》
EI
CAS
2008年第6期531-537,共7页
Journal of North University of China(Natural Science Edition)
基金
国家自然科学基金资助项目(50879014)
