双超卫星平台柔性线缆构型设计与仿真

Configuration Design and Simulation of Flexible Cables for Dual-super Satellite Platform

研究舱间线缆动力学模型及其扰动传递特性,是深入考察连接线缆刚柔耦合效应影响的重要依据。以绝对节点坐标方法(ANCF)三维缩减曲梁单元模型为背景,考虑线缆的大变形特性,构造新的大变形线缆单元弹性力模型。在此基础上,用数值方法对典型约束工况下线缆单元弹性力模型进行计算和分析,获得位移-扰动力线性关系下的两舱振幅范围。此外,结合有限元方法,获得了舱间线缆不同布线构型的等效结构刚度矩阵模型。结果表明:布线过程中合理排列不同材料性能线缆,可有效降低耦合效应的影响,为后续舱间线缆布线规划提供了理论依据。

The dynamics model and disturbance transfer characteristics of cabin cables are always an important basis for the research on the rigid-flexible coupling effect of the connecting cables. In view of this,a new elastic force model for large deformation cable elements is built based on the three-dimensional(3D)reduced curved beam element model of absolute nodal coordinate formulation(ANCF). Then,the elastic force model under typical constraint conditions is calculated and analyzed numerically, and an amplitude range under the linear relationship of the displacement and the disturbance force is obtained. Furthermore,the equivalent structural stiffness matrix of different arrangements of cables is obtained with the finite element method. The results show that the effect of coupling induction can be reduced effectively by the reasonably arrangement of different cables. The conclusions are of important engineering significance for the mechanics modeling of flexible cables and the routing processes.