摘要
针对航行船舶的兴波阻力和姿态预报,采用Rankine源高阶面元法求解船舶航行兴波问题。计算时采用叠模线性化自由面条件,对自由面影响系数奇异积分采用源点上置的方法处理,物面奇异积分和立体角则直接求解。就数学船型Wigley、S60和KCS集装箱船的航行兴波阻力与姿态分别进行了数值计算与分析,计算中根据姿态变化重新划分船体湿表面,进行迭代计算,不同航速下的姿态、兴波阻力和船侧波高与试验结果比较,吻合良好,自由面波形真实反映了物理现象,研究表明本文方法能准确地预报船舶航行姿态和兴波阻力,对不同船型和航行速度有着广泛的适用性。
Aiming to predict ship performance such as wave drag, sinkage and trim, the steady ship wave problem is solved based on the high-order Rankine source method. Linearized free-surface condition with respect to double body potential is adopted in the calculation. And the raised panel approach is used to remove the singularity of integral related to influence coefficients on the free surface. Singular integral and solid angle of ship hull is solved directly. The present method is applied to Wigley, S60 and KCS container ships; sinkage, trim, wave drag and wave profile of these ships are calculated. The computation is iterative for ship mean wetted surface, which is regenerated based on the calculation of sinkage and trim. Numerical results and referenced experimental data are in good agreement. Calculated wave pattern agrees with Kelvin wave. It is indicated that present method is robust and suitable to predicting sinkage, trim and wave drag of ships with different hull types and at various speeds.
出处
《中国造船》
EI
CSCD
北大核心
2015年第3期1-12,共12页
Shipbuilding of China
基金
973计划资助项目(2014CB046203)
