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由于存在大变形、非连续和大体量等特点,对大型太阳电池阵的展开过程进行动力学仿真面临着巨大的数值困难。基于共旋坐标法和无转动自由度的板壳理论,考虑柔性电池基板的几何非线性效应与电池板之间的接触碰撞,建立大变形柔性太阳电池阵的多体动力学模型。对大型的太阳电池阵的展开的动力学过程进行数值仿真,并对该过程中的复杂的动力学现象进行分析。研究结果给出了不同驱动下电池基板的响应、应力分布特征以及基板之间的碰撞规律。此项研究不仅为空间站大型太阳电池阵的设计和优化提供了参考依据,也为其它大型可展开空间结构的仿真提供了一种多体动力学分析方法。
Due to the characteristics of large deformation, discontinuity and large volume, the dynamic simulation of the deployment process of large solar array faces enormous numerical difficulties. Based on the co-rotating coordinate method and the plate-shell theory with no rotational freedom, a multi-body dynamic model of large deformation flexible solar array is established considering the geometric nonlinear effect of the flexible battery substrate and the contact collision between the solar panels. The numerical simulation of the unfolding kinetic process of a large solar array is carried out and the complex kinetic phenomena in the process are analyzed. The results show the response of the battery substrate under different driving forces, the stress distribution characteristics and the collision between the substrates. This study not only provides a reference for the design and optimization of large solar arrays in space station, but also provides a multi-body dynamic analysis method for the simulation of other large expandable space structures.