【摘要】 研究船舶在波浪环境中的自由操纵运动对船舶操纵性具有重要意义。本文对ONRT全附体模型在规则波中的回转运动进行仿真研究。采用基于结构化动态重叠网格的自研CFD软件HUST-Ship求解RANS方程与船体六自由度运动方程的耦合问题。RANS方程通过有限差法离散,并使用PISO算法进行求解。波浪中操纵运动使用了移动计算域方法,而且船后螺旋桨使用迭代型体积力方法替代,提高计算效率。波浪回转操纵运动特征参数(纵距、正横距、战术直径)的预报结果与试验数据进行了比较,验证了仿真的可靠性。进一步分析了运动特征参数的变化,研究波浪对回转运动的影响。更多还原

【Abstract】 It is very important for ship maneuverability to study the maneuvering motion of a free-running ship in waves. This paper presents the simulation studies of the turning motion in the regular wave of the full-appendage ONRT model. Numerical simulations are performed using viscous CFD code HUST-Ship to solve the RANS equation coupled with six degrees of freedom(6 DOF) solid body motion equations and dynamic overset grids designed for ship hydrodynamics.RANS equations are discretized by finite difference method and solved by PISO algorithm. The moving domain method is adopted and the propeller is replaced by the iterative body-force method for the turning motion in wave to improve the computation efficiency. The simulated parameters of the turning trajectories in wave are compared with test data to verify the reliability of simulation. Furthermore, the motion characteristic parameters are analyzed to study the influence of waves on the turning motion in this paper.更多还原