船舶纵向运动水动力参数模型的建立及分析

Modeling and analyzing of ship longitudinal movementhydrodynamic coefficient

针对船舶在海上运动的全天侯情况,在分析442T水面舰艇水动力参数的基础上,提出了一种建立船舶纵向运动水动力参数模型的方法。基于船模水池实验,依据切片理论得到典型海况下的水动力参数,采用最小二乘法和插值法建立船舶纵向运动全天候水动力参数模型并进行仿真研究。结果表明:该模型合理并且实用;该模型可实时在线的计算出船舶在任何航向、航速及海情下的且与频率无关的水动力参数,从而构造出船舶纵向运动控制模型。

Aim to study ship longitudinal movement at sea all-weather, we propose the modeling method of longitudinal movement of ship modeling by analyzing 442T surface combatant. On the basis of microtome section theory, we get the hydrodynamic coefficient tested in water pool with least-square method. The result of simulation shows the model is effective. The model can compute the hydrodynamic coefficient of different speed, course and frequency regular wave disturbance. Based on the coefficient, longitudinal movement of ship modeling is constructed.