Rigid-flexible coupled dynamic analysis for a spacecraft with an axially moving flexible beam

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (2) : 91-101.

CHENG Shun，SHEN Zhen-xing，CUI Tao，LI Hui-jian

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Abstract

Nowadays, spacecraft industry develops quickly to directions of large-scale, complicate and precision. Considering the rigid-flexible coupled effect of an axially moving flexible beam attached and a spacecraft’s main body is very necessary to improve service life, operation precision and working efficiency of the spacecraft. Here, based on Euler-Bernoulli beam theory and the rigid-flexible coupled modeling method in the flexible multi-body dynamics, the dynamic model for a rigid-flexible coupled system including an axially moving flexible beam and a spacecraft was established. The dynamic equations of the system were derived by using Hamilton principle. The dynamic equations of the system were solved with the separation variable method and the mode-superposition method. Several examples were numerically computed with the fourth order Runge-Kutta method. Finally, the effects of radius and mass density of spacecraft main body and axial velocity of flexible beam on the transverse vibration of the axially moving flexible beam and the attitude angle of the spacecraft were analyzed using the above several examples.

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rigid-flexible coupled system / axially moving beam / dynamic analysis / transverse vibration / attitude angle

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CHENG Shun，SHEN Zhen-xing，CUI Tao，LI Hui-jian. Rigid-flexible coupled dynamic analysis for a spacecraft with an axially moving flexible beam[J]. Journal of Vibration and Shock, 2018, 37(2): 91-101

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