固体力学与飞行器总体设计

基于结构优化方法的气瓶支架轻量化设计

  • 李修峰 ,
  • 高令飞 ,
  • 王浩攀
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  • 中国空间技术研究院 通信卫星事业部, 北京 100094

收稿日期: 2017-03-23

  修回日期: 2017-07-18

  网络出版日期: 2017-07-18

基金资助

省部级项目

Lightweight design of bracket for supporting gas cylinder based on structural optimization method

  • LI Xiufeng ,
  • GAO Lingfei ,
  • WANG Haopan
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  • Institute of Telecommunication Satellite, China Academy of Space Technology, Beijing 100094, China

Received date: 2017-03-23

  Revised date: 2017-07-18

  Online published: 2017-07-18

Supported by

Provincial/Ministerial Level Project

摘要

针对某卫星平台气瓶支架材料利用率低且生产与装配工艺复杂的问题,基于结构优化与分析方法设计了一种轻量化且构型简单的金属材料气瓶支架。首先,通过分析气瓶装配关系及其相关的载荷与边界条件,确定支架结构的设计空间,基于变密度法寻找支撑结构中最佳传力路径;其次,创建支架基本几何模型并利用尺寸优化技术得到最佳的结构特征尺寸;再次,形成详细的结构设计方案并进行支架刚度、强度与稳定性等多种力学性能分析;最后,通过模态试验测试支架的实际刚度性能,试验测试结果与预测结果吻合较好,验证了力学分析的准确性以及设计方案的合理性。应用该方法设计的支架实现了17%的结构减重,新方案不但满足气瓶支撑系统星上使用要求,而且简化了支架生产与装配工艺,为同类结构设计提供了一种有效的技术途径。

本文引用格式

李修峰 , 高令飞 , 王浩攀 . 基于结构优化方法的气瓶支架轻量化设计[J]. 航空学报, 2017 , 38(12) : 221267 -221267 . DOI: 10.7527/S1000-6893.2017.221267

Abstract

To improve material efficiency and simplify manufacturing and assembling processes of the bracket, which is used for mounting the gas cylinder on the satellite, the structural analysis and optimization method is studied to design a lightweight metal bracket with simple configuration. Firstly, the space and the best load path for the bracket are defined based on the variable density method after analysis of the assembly relationship as well as related loads and boundary conditions. The basic geometry model is reconstructed according to the topology optimization results and the best feature sizes of the geometry model are obtained via size optimization method. Secondly, the detailed geometry model is designed and several mechanical performances of the bracket, including stiffness, strength and stability, are analyzed. Thirdly, the stiffness of the bracket is tested by modal test, and the test results are in good agreement with the analysis results. Therefore, the accuracy of the mechanical analysis and the design rationality of the bracket are verified. The proposed lighter bracket reduces structures mass by 17%, and the new design not only satisfies the usage requirements on the satellite but also simplifies the manufacturing and assembling processes. It is shown that the structural design method proposed is effective for reducing the structure weight, and can be used for lightweight design of similar structure.

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