潜艇航向改变时产生的升沉力和俯仰力矩的研究

The Study of Heaving Force and Pitching Moment of a Turning Submarine

本文对潜艇航向改变时产生的升沉力和俯仰力矩进行了理论和实验研究,论证了潜艇航向改变时伴随产生升沉力和俯仰力矩的原因在于指挥台和艇体涡干扰以及指挥台周围的三维流动效应。基于细长体理论,提出了一种预测该升沉力和俯仰力矩及其涡干扰的工程方法。另一方面,应用奇点分布法讨论前体的三维效应,给出了两个修正因子,以提高计算精度。对一个简化的模型艇同时作了实验测定与理论计算,结果表明,在漂角小于12°范围内计算与实验值吻合良好。

In this paper, the theoretical and experimental study of heaving force and pitching moment of a turning submarine is made. The heaving force and pitching moment are caused by the interference of vorticities of fairwater and hull, and the three dimensional flow effect around the fairwater when the submarine turns. Based on slender body theory, an engineering method for estimating the heaving force and pitching moment and the vortex interference effects on the submarine is described. The three dimensional flow effect around the fore-body is analyzed by the surface singularity method and two interference factors are obtained. The method is applied to a submarine model and the model experiment is carried out. The predicted values agree well with the experimental ones as the angle of drift is less than 12°.