FEM analysis on the nonlinear vibration properties of a coilable mast

FAN Pengxuan, CEHN Wujun, ZHANG Yibei, ZHAO Bing

Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (10) : 80-86.

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PDF(1277 KB)
Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (10) : 80-86.

FEM analysis on the nonlinear vibration properties of a coilable mast

  • FAN Pengxuan, CEHN Wujun, ZHANG Yibei, ZHAO Bing
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Abstract

The nonlinear vibration properties of a coilable mast will decide the prestress of cable and the vibration control of spacecraft. The vibration analysis of the coilable mast was figured in the prestress range which had been derived by geometrical exact analysis and buckling analysis. For small amplitude vibrations, the geometric nonlinearity caused by the loading effect of cable prestress was considered, then, by the eigenvalue iteration method, the natural modes and frequencies were obtained. After calculations in accordance with various cable prestresses, the “frequencyprestresscable diameter” surface as a guide manual in design was acquired. For large amplitude vibrations, the dynamic response signal processing was used to extract the natural modes and frequencies. Where the dynamic responses were obtained by explicit integration and the signal processing was conducted by FFT and SSI/data method. It is also found, when inspecting the dynamic response signals, the cable has the ability to decrease the amplitude of large vibration rapidly by means of changing the state between tension and relaxation alternatively at a high frequency, which will contribute to the rebalance of energy distribution of the coilable mast.

Key words

Coilable mast / nonlinear vibration / frequency extracting / modal identification

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FAN Pengxuan, CEHN Wujun, ZHANG Yibei, ZHAO Bing. FEM analysis on the nonlinear vibration properties of a coilable mast[J]. Journal of Vibration and Shock, 2018, 37(10): 80-86

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