绳索-金属丝网组合结构力热匹配设计

doi:10.3969/j.issn.1001-2400.2018.02.009

西安电子科技大学学报

绳索-金属丝网组合结构力热匹配设计

李团结1;杨丽1;李洋2;马小飞2

(1. 西安电子科技大学机电工程学院，陕西西安 710071;
2. 中国空间技术研究院西安分院，陕西西安 710000)

收稿日期:2017-04-13 出版日期:2018-04-20 发布日期:2018-06-06
作者简介:李团结(1972-)，男，教授，E-mail：tjli@mail.xidian.edu.cn
基金资助:
国家自然科学基金资助项目(51775403, U1537213)

Mechanical-thermal matching design for the rope-wire mesh composite structure

LI Tuanjie1;YANG Li1;LI Yang2;MA Xiaofei2

(1. School of Mechano-electronic Engineering, Xidian Univ., Xi'an 710071, China;
2. China Academy of Space Technology(Xi'an), Xi'an 710000, China)

Received:2017-04-13 Online:2018-04-20 Published:2018-06-06

摘要/Abstract

摘要：

网状可展开天线反射面是由柔性绳索与金属丝网缝制而成的．由于不同材料力热差异引起金属丝网与纤维绳索变形不协调，影响了绳索金属丝网组合结构的预应力分布与形面精度，降低了反射面的电性能．为此，有必要研究绳索金属丝网组合结构的力热匹配设计问题．文中采用只承受张力的两节点杆模拟绳索，利用膜模拟金属丝网结构，建立了绳索金属丝网组合结构力学模型，分析了绳索金属丝网组合结构热变形影响规律，对绳索截面参数进行了匹配设计．以环形桁架网状可展开天线为例，仿真结果表明，采用文中的力热匹配设计方法，在温变环境下反射面的热稳定性得到很大的改善，形面精度提高了92％．

关键词: 网状可展开天线, 绳索, 金属丝网, 组合结构, 力热匹配

Abstract:

The reflector of the mesh deployable antenna is made of a flexible rope sewn with a wire mesh. Due to the mechanical-thermal differences between two materials, the deformation of the wire mesh is uncoordinated with fiber ropes, which affects the pre-stress distribution and surface accuracy and degrades the electric performance of the reflector. Therefore, it is of great significance to study the mechanical-thermal matching design for the rope-wire mesh composite structure. In this paper, the rope is modeled as a two-point bar which only bears tension, and the wire mesh is modeled as a membrane. Then the mechanical model of the rope-wire mesh composite structure is established to analyze the influence of thermal deformation, and optimizes the design of cross-section parameter of ropes. Finally, the circular truss mesh deployable antenna is used as a numerical example to demonstrate the feasibility of the mechanical-thermal matching design method. Simulation results indicate the thermostability of the reflector is improved under a variable temperature, and the surface accuracy of the reflector increases by 92％, using the proposed mechanical-thermal matching design method for rope-wire mesh composite structures.

Key words: mesh deployable antenna, rope, wire mesh, composite structure, mechanical-thermal matching

李团结;杨丽;李洋;马小飞. 绳索-金属丝网组合结构力热匹配设计[J]. 西安电子科技大学学报, 2018, 45(2): 48-53.

LI Tuanjie;YANG Li;LI Yang;MA Xiaofei. Mechanical-thermal matching design for the rope-wire mesh composite structure[J]. Journal of Xidian University, 2018, 45(2): 48-53.

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[2]	梁震涛;陈建军;马洪波. 随机参数板梁组合结构有限元分析的随机因子法[J]. J4, 2005, 32(2): 201-205.

绳索-金属丝网组合结构力热匹配设计

Mechanical-thermal matching design for the rope-wire mesh composite structure

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