吊放声呐绞车吊缆振动分析

为了准确模拟航空吊放声呐绞车工作时吊缆的运动形态，以某型号航空绞车为研究对象，基于单摆原理，建立吊物摆动数学模型；根据柔性体振动特性，推导出机身与风载荷作用下吊缆的振动微分方程，采用显式差分法完成微分方程的求解。通过仿真算例研究了不同激励频率下吊物的摆动幅度变化及吊头激励位移对吊缆振动的影响，结果证明了理论及算法的准确性。

Vibration Analysis of Cable in Launch Sonar Winch

In order to accurately simulate movements of suspended cable during the operations of aerial winchs, one type of hydraulic winch was used as a case study herein. A hanging swing mathematical model was set up based on pendulum theory. According to the vibration characteristics of flexible cables, nonlinear differential equation of vibrations of the cable was deduced and solved by explicit difference method. Through simulations, the swing angle variations of lifting loads under different excitation frequencies and the influences of hanging head displacements on the cables were analyzed, accuracy of the algorithm was proved herein. Conclusions drawn from this paper may provide theoretical basis for practical engineering designs and may be used for the air winch lifting system cable vibrations forecasting and reduction.