Transfer function modeling for elastic vibration of complicated structures based on finite element analysis

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (11) : 57-61,7.

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Transfer function modeling for elastic vibration of complicated structures based on finite element analysis

WU Xin-feng,LEI Yong-jun,LI Jia-wen

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Abstract

A new methodology to establish transfer function modeling for elastic vibrations of complicated structures is presented. Based on the dynamic analysis of a refined finite element model for the structures, the transfer function model is obtained both in time-domain identification and frequency domain identification. The transient response results of PRBS excitation are used for the identification of the transfer function model gained in time domain and the frequency response results are used for that in frequency domain. The precision of the model can be verified by each other. At last, the example of a cantilever beam indicates that the presented method is feasible and effective.Further, the vibration model for a rocket and missile’s local structures are established to offer a valuable reference in engineering application.

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Finite Element Analysis / elastic vibration / transfer function / parameter identification

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WU Xin-feng;LEI Yong-jun;LI Jia-wen. Transfer function modeling for elastic vibration of complicated structures based on finite element analysis[J]. Journal of Vibration and Shock, 2012, 31(11): 57-61,7