基于重叠网格的船舶运动计算方法研究

文章应用重叠网格技术和单相Level-set捕捉自由面方法，结合数值造波技术和六自由度运动方程，形成了基于RANS方程的船舶运动响应数值计算方法，并在中国船舶科学研究中心自主研发的船舶专用粘流计算软件OShip上实现。应用该方法计算了DTMB5512船模在迎浪规则波中的运动响应，并通过对计算得到的船模运动时历曲线进行傅里叶变换，提取其运动的幅值和相位，得到了不同航速下船模垂荡和纵摇运动的频响曲线，所得结果与试验结果吻合较好。

Research on calculation method for ship motion based on dynamic overset approach

This research applies dynamic overset grid and single phase Level-set method and accommodates numerical wave making technique and 6 DOF motion equations to form the numerical method for calculat-ing ship motion response, and this method is realized by using self-developed calculation software-Oship de-veloped by China Ship Scientific Research Center. Motion responses of DTMB 5512 advancing in regular head waves are computed using this method. Through the fast Fourier transform of time history of ship motions, amplitudes and phases of ship motions are acquired to determine the heave and pitch transfer functions and phases of DTMB 5512 at different speed. The simulation results show fair agreements with experiments.