基于体积力法的全附体KCS型船模PMM运动数值模拟

发布时间：2018-05-03 06:07

本文选题：体积力法 + KCS船型　；参考：《中国舰船研究》2016年04期

【摘要】：为高效、精确地求解船舶操纵水动力导数,以全附体KCS型船模为研究对象,基于RANS方程及VOF模型,在star-ccm+平台上采用体积力法模拟螺旋桨作用,计及自由面兴波及航行姿态变化对船模水动力的影响,开展斜航、纯艏摇、漂角和艏摇组合3种平面运动机构(Planar Motion Mechanism,PMM)运动的数值模拟,将横向力Y、艏摇力矩N、横倾力矩K的数值模拟结果与试验结果进行对比,并依照PMM试验的动力学方程,通过最小二乘法拟合和傅立叶积分,将数值模拟结果与试验结果的时历曲线进行分析处理,求得操纵水动力导数。研究结果表明:该方法用于数值模拟PMM运动是可行的;求得的水动力导数中Y′vvv,N′vvv误差略大,其余水动力导数误差均在15%以内。
[Abstract]:In order to solve the hydrodynamic derivative of ship maneuvering efficiently and accurately, taking the fully attached KCS model as the research object, based on the RANS equation and VOF model, the volume force method is used to simulate the propeller action on the star-ccm platform. Considering the influence of free surface and navigation attitude change on the hydrodynamics of ship model, the numerical simulation of plane motion mechanism (Planar Motion MechanismPMM) is carried out, which is composed of slanting, pure yaw, drift angle and yaw. The numerical simulation results of transverse force Y, yawing moment N and roll moment K are compared with the experimental results. According to the dynamic equation of PMM test, the method of least square fitting and Fourier integral are used. The time-history curves of the numerical simulation and the experimental results are analyzed and processed to obtain the hydrodynamic derivatives. The results show that the method is feasible for numerical simulation of PMM motion, and the error of the obtained hydrodynamic derivatives is slightly larger than that of the rest. The errors of the other hydrodynamic derivatives are within 15%.
【作者单位】：海军工程大学舰船工程系;
【基金】：水动力学重点基金资助项目(9140A14030712JB11044) 海军工程大学自然科学基金资助项目(435517J4040)
【分类号】：U661.3

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