Modal tests and analysis of a weave composite space deployable truss

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (17) : 155-160.

ZHANG Yibei1,GAO Jifeng1,CHEN Wujun1,ZHANG Daxu1,FANG Guangqiang2,CAO Zhengli2,PENG Fujun2

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Abstract

A large space deployable truss made of weave composite material was taken as a study object. Modal tests in microgravity environment and simulation analysis were conducted for this truss. The space truss was mainly composed of circular hollow section pipe,triangular spacer and oblique stiffened cable. In modal tests,a pneumatic electromagnetic suspension system was used to realize a structure’s gravity off-loading and simulate the microgravity environment. In simulation analysis,a circular hollow section pipe made of weave composite material was assumed to be an orthotropic material structure; a triangular spacer made of laminated composite material was assumed to be an isotropic material structure; the effects of oblique stiffened cable’s pre-stress on structural stiffness and oblique stiffed cable’s equivalent elastic modulus were considered. The simulation results agreed well with those of tests. The study results provided a reference for studying large pre-stressed space deployable trusses.

Key words

weave composite material / space deployable truss / microgravity modal test / pre-stress / nonlinear stiffened cable

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ZHANG Yibei1,GAO Jifeng1,CHEN Wujun1,ZHANG Daxu1,FANG Guangqiang2,CAO Zhengli2,PENG Fujun2. Modal tests and analysis of a weave composite space deployable truss[J]. Journal of Vibration and Shock, 2018, 37(17): 155-160

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