船舶多自由度斜航运动水动力数值研究（英文）
发布时间：2018-09-10 07:36
【摘要】：计及多自由度运动的船舶斜航水动力预报对船舶航行安全具有重要意义。文章通过耦合求解船舶运动方程和雷诺平均N-S方程,并采用VOF方法和高精度自由面捕捉技术对作多自由度斜航运动船舶的粘性绕流场进行数值模拟。船舶动态平衡位置根据计算出的力和力矩来决定,得到包括升沉、纵倾和横倾在内的船舶浮态。文中采用的算例与爱荷华大学进行的模型试验相同,通过比较数值计算结果和试验值验证了该方法的有效性。对船模在受约束和自由运动两种状态下的船舶运动和流场进行模拟,通过比较分析船舶升沉、纵倾和横倾的影响。文中计算获得的详细流场细节特征,包括前体和舭部的涡以及船体表面上的压力,有助于理解船舶斜航运动浮态变化的机理。
[Abstract]:The prediction of ship's oblique hydrodynamic force considering the motion of multiple degrees of freedom is of great significance to the safety of ship navigation. In this paper, the ship motion equation and Reynolds average N-S equation are solved by coupling method, and the viscous flow field around the ship with multiple degrees of freedom is numerically simulated by using the VOF method and the high precision free surface capture technique. According to the calculated force and moment, the dynamic equilibrium position of the ship is determined, and the floating state of the ship including heave, trim and roll is obtained. The numerical examples are the same as the model tests carried out by the University of Iowa. The effectiveness of the proposed method is verified by comparing the numerical results with the experimental results. The ship motion and flow field of ship model under two conditions of constrained and free motion are simulated and the effects of heave, trim and heeling are analyzed by comparison. The detailed characteristics of the flow field obtained in this paper, including the vortices of the precursor and bilge and the pressure on the hull surface, are helpful to understand the mechanism of the floating state change of the ship's oblique motion.
【作者单位】： 浙江海洋大学船舶与海洋工程学院浙江省近海海洋工程技术重点实验室;浙江海洋大学东海科学技术学院;中国船舶科学研究中心;
【基金】：Supported by National Natural Science Foundations of China(Grant No.51109186) Zhejiang Provincial Natural Science Foundations of China(Grant No.LY16E090004,LY14E090003) the Open Foundation from Key Laboratory of Marine Fishery Equipment and Technology of Zhejiang(MFET201401)
【分类号】：U661.1
本文编号：2233799
[Abstract]:The prediction of ship's oblique hydrodynamic force considering the motion of multiple degrees of freedom is of great significance to the safety of ship navigation. In this paper, the ship motion equation and Reynolds average N-S equation are solved by coupling method, and the viscous flow field around the ship with multiple degrees of freedom is numerically simulated by using the VOF method and the high precision free surface capture technique. According to the calculated force and moment, the dynamic equilibrium position of the ship is determined, and the floating state of the ship including heave, trim and roll is obtained. The numerical examples are the same as the model tests carried out by the University of Iowa. The effectiveness of the proposed method is verified by comparing the numerical results with the experimental results. The ship motion and flow field of ship model under two conditions of constrained and free motion are simulated and the effects of heave, trim and heeling are analyzed by comparison. The detailed characteristics of the flow field obtained in this paper, including the vortices of the precursor and bilge and the pressure on the hull surface, are helpful to understand the mechanism of the floating state change of the ship's oblique motion.
【作者单位】： 浙江海洋大学船舶与海洋工程学院浙江省近海海洋工程技术重点实验室;浙江海洋大学东海科学技术学院;中国船舶科学研究中心;
【基金】：Supported by National Natural Science Foundations of China(Grant No.51109186) Zhejiang Provincial Natural Science Foundations of China(Grant No.LY16E090004,LY14E090003) the Open Foundation from Key Laboratory of Marine Fishery Equipment and Technology of Zhejiang(MFET201401)
【分类号】：U661.1
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