“育鹏”轮斜航水动力数值计算及运动仿真
Numerical calculation of oblique navigation hydrodynamics and motion simulation of YU PENG

DOI：10.7511/dllgxb201906009

 作者 单位 苑洋,张秀凤,周佳其,马利华

为了建立高精度船舶运动数学模型，以目前国内最大、最先进的大连海事大学教学实习船“育鹏”轮为研究对象，采用计算流体力学方法，分别对该船模压载状态下的直航运动和斜航运动水动力进行数值计算，将直航阻力系数计算结果与船模物理水池试验数据进行比较，验证了计算方法的可行性；对斜航水动力系数和力矩系数利用最小二乘法进行多项式拟合求取相关操纵性斜航水动力导数，代入“育鹏”轮六自由度运动数学模型中，用于预报和运动仿真．将部分仿真试验结果与实船海试数据进行对比，吻合较好，误差均在12%以内，验证了数学模型的正确性，提高了航海模拟器数学模型的精度．

In order to establish a high-precision mathematical model of ship motion, the domestic current most advanced teaching and practice ship YU PENG of Dalian Maritime University is taken as the research object, and the computational fluid dynamics method is applied to the ship model under ballast conditions. The numerical calculation of the hydrodynamics forces on the ship model in straight ahead motion and oblique motion is carried out. The calculation results of the resistance coefficient in straight ahead motion are compared with the physical model test data to verify the feasibility of the calculation method. For the hydrodynamic force and moment coefficients of oblique motion, the least squares polynomial fitting is used to obtain the relevant maneuvering hydrodynamic derivatives of oblique motion, which are substituted into the mathematical model of the six-degree-of-freedom motion of YU PENG for prediction and motion simulation. Comparing some simulation results with the actual ship sea trials data, the agreement is good, the error is within 12%, which verifies the correctness of the mathematical model and the accuracy of the mathematical model of the navigation simulator is improved.