深空探测器模块化结构动力学研究

随着深空探测器技术的不断发展，深空探测器设计逐渐转向模块化和标准化。串联结构是模块化深空探测器常见并较为合理的结构形式，而如何将运载对探测器整体模态频率的指标要求合理转化为对探测器各个模块结构的设计要求是当前工作中的一项挑战。根据子结构综合模态法并基于固定边界法和悬臂梁理论，提出了探测器子结构模块动力学模态指标的分配方法。采用3种子结构模块极限处理方法，用全解析方式推导了子结构模块的基频表达式，并分析了子结构模块的动力学特性与探测器整体结构动力学特性之间的关系。提出的子结构模块的动力学指标分解方法操作简单，精度较高，可为串联式模块化深空探测器的设计提供关键性的指导。

Structure Dynamics Analysis of Modularized Deep Space Detector

Modularized and standardized concepts of deeps pace detectors are increasing along with the development of deep space exploration technique. Series connection between different sub-modules of deep space detectors are reasonable and popular, and it is a challenge to propose a reasonable dynamic response index for a single sub-module according to the dynamic response index of the overall series-connected structure. Based on the substructure modal synthesis method and the cantilever beam theory, It proposes a method for assigning design index of dynamic response for sub-modules of series-connected structures. The equation of fundamental frequencies of sub-modules are derived analytically based on three consumptions, and the relation between the dynamics of sub-modules and that of overall series-connected structure are discussed. The proposed dynamics index assignment method shows high accuracy and can provide critical instructions for the design of series-connected modularized deep space detectors.