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

Abstract

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

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

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