引信球转子转正运动终止条件分析

Analysis for the Finishing Condition of Rotation for a Fuze Ball Rotor

为得出描述引信球转子转正运动终止状态的动态平衡角,从而解决球转子工程设计的可靠性问题,建立了质心、形心与弹丸旋转轴三者均不重合时球转子转正运动终止时刻的受力平衡方程组,讨论了引信球转子转正运动微分方程组求解的终止条件。以某引信球转子设计为例进行了数值仿真。仿真结果表明:引信球转子动态平衡角接近于零但不等于零,并且散布较大。实验结果表明:进行球转子设计时,在提高延期解除保险性能前提下应兼顾动态平衡角,以提高发火与传爆可靠性,特别是在球转子直径较大、采用针刺发火原理或旋转偏心较大的场合。

In order to get the dynamic balanced angle used to describe the rotating motion finishing state of a fuze ball rotor and improve its reliability in the engineering design, the balanced equations of applied forces were established at the end of rotating motion of the fuze ball rotor whose mass center does not coincide with its geometric center and has an offset from the spin axis of the projectile. The finishing condition was discussed for the solution of coupled differential equations of the rotating motion of the fuze ball rotor. As an example, the dynamic balanced angle of a certain fuze ball rotor was numerically simulated. The simulated result shows that the dynamic balanced angle is near to, but not equal to zero and has a large dispersion. The experiment result shows that on the basis of improving the delay arming performance, the dynamic balanced angle should be considered to increase the reliability of fire and transmission of detonation at the beginning of design for the fuze ball rotor, especially under the situations of the large fuze ball rotor diameter and spin eccentricity, and the used stab detonator.