一种求解拖索释放完瞬时动态张力的方法

A Method of Solving the Instantaneous Dynamic Tension at the End of Cable Release

本文运用变质量动力学理论和能量原理对拖索释放过程中的动力特性进行了比较深入的研究。解决了拖索释放完瞬时动态张力的确定问题。首先,从考察拖靶系统在释放过程中可能出现的各种情况的一般性入手,建立系统的运动方程;其次,对拖索释放完瞬时受载特点进行了分析,导出了拖索释放完瞬时动态张力的计算方法;第三,对惯性力项进行了探讨,利用能量原理解决了惯性项的确定问题。最后,以某型载机-拖靶系统为实例进行了计算,其结果已用于拖靶设计中,取得令人满意的效果。

This paper studies deeply the dynamic characteristics of the process in which the cable is being released by utilizing the dynamics theory of variable mass and the principle of en-ergy, solving the problems of determining the instantaneous dynamic tension at the end of cable release. Starting with various case possibly occuring in the towed target system dur-ing releasing, the generality of the system is thoroughly inspected to establish the motion differential equations of the system at first. Secondly, the instantaneous characteristics of the cable under loads at the end of release is analyzed, and a computing method of the in-stantaneous dynamic tension at the end of cable release is derived. Thirdly, the inertial item in the equation is explored, and the problems of determining inertia item are solved by using the energy principle. Finally, a combination of a plane and a towed target is tak-en as an example for computation, and the result has been used in designing the towing target system with satisfaction.