论文

考虑接头参数化的空间桁架轻量化设计

  • 张瑞桐 ,
  • 汪雷 ,
  • 刘佳佳 ,
  • 朱继宏
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  • 1.西北工业大学 航宇材料结构一体化设计与增材制造装备技术国际联合研究中心,西安 710072
    2.中国运载火箭技术研究院,北京 100076
    3.北京宇航系统工程研究所,北京 100076
.E-mail: supersonic0105@163.com

收稿日期: 2023-09-10

  修回日期: 2023-10-12

  录用日期: 2023-10-24

  网络出版日期: 2023-12-01

基金资助

国家重点研发计划(2022YFB3402200);国家自然科学基金重点基金(92271205)

Lightweight design of space trusses considering joint parameterization

  • Ruitong ZHANG ,
  • Lei WANG ,
  • Jiajia LIU ,
  • Jihong ZHU
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  • 1.State IJR Center of Aerospace Design and Additive Manufacturing,Northwestern Polytechnical University,Xi’an 710072,China
    2.China Academy of Launch Vehicle Technology,Beijing 100076,China
    3.Beijing Aerospace Systems Engineering Research Institute,Beijing 100076,China

Received date: 2023-09-10

  Revised date: 2023-10-12

  Accepted date: 2023-10-24

  Online published: 2023-12-01

Supported by

National Key Research and Development Program of China(2022YFB3402200);National Natural Science Foundation of China(92271205)

摘要

提出了一种考虑接头参数化建模的连杆布局优化方法,该建模过程是基于轴线夹角及尺寸完成的。管状接头结构的几何特性由被连接杆件之间的相互位置和尺寸决定,通过将其相对位置转化为接头轴线夹角,将其尺寸转化为接头主管及支管尺寸实现了接头有限元模型的参数化建模。接头结构的空间位置可由被连接件的空间位置转化的轴线交点决定,综上可以实现接头有限元模型的嵌入及整体桁架结构的有限元模型建立。利用基于高斯过程的贝叶斯方法对于桁架连杆布局进行优化设计,同时将制造难度纳入考虑并给出具体的设计方案。数值算例表明,优化方法可有效提高优化目标即结构固有频率。

本文引用格式

张瑞桐 , 汪雷 , 刘佳佳 , 朱继宏 . 考虑接头参数化的空间桁架轻量化设计[J]. 航空学报, 2024 , 45(5) : 529715 -529715 . DOI: 10.7527/S1000-6893.2023.29715

Abstract

A layout optimization method of connecting beams considering joints parametric modeling is proposed. The parametric modeling process is based on axis angle and size. The geometric characteristics of the tubular joints are determined by the mutual position and size of the connected beams. The parametric modeling of the joint finite element model is realized by converting the mutual position into the axis angle of the joints and the size into the joint head and branch pipe size. The spatial position of the joint structure can be determined by the axis intersection transformed from the spatial positions of the connected beams. In conclusion, the finite element model of the joint can be embedded, and the finite element model of the whole trusses structure can be established. The Bayesian method based on Gaussian process is used to optimize the layout of the trusses connecting beams, and the manufacturing difficulty is considered and the concrete design scheme is given. Numerical examples show that the optimization method can effectively improve the natural frequency of the structure.

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