人造卫星太阳翼电池阵板非线性动力子结构分析

本文采用动力子结构方法,对人造卫星太阳翼电池阵板在展开状态的无阻尼自由振动进行了线性及非线性分析.在线性分析中,比较了3种不同动力子结构方法的优缺点,并成功地将Lanczos 矢量引入了Hurty 方法,非线性分析以Hurty法为基础,对具有非线性连接锁定机构的太阳翼电池阵板进行了计算,并得到不同初始条件下太阳翼的自由振动周期.实验证明,计算结果是正确的、合理的.

Dynamic Substructure Analysis for Solar Arrays with Non-linear latching Devices

In this paper,a number of dynamic substructure methods are used for solving the problems of linear and non-linear undamped free vib- ration of the solar arrays on a satellite.The advantages and disadvantages of these dynamic substructure methods(Hurty,Hintz,MacNeal and FEM) are compared in linear analysis.The method of introducing Lanczos vectors into Hurty method,so that the computation of eigenvalues of substructures can be avoided,is specially notified.On the basis of the Hurty method,the periods of free vibration of the solar arrays with nonlinear latching devices for different initial conditions were analyzed.It is shown on the computa- tion results,that the increase of the gaps in these latching devices and the decrease of vibration amplitudes have same effect on the increase of the periods.If the ratios of the gaps to.the amplitudes are increased,the vibration periods will be increased.They,however,will be decreased if the ratios are decreased.