Modal parameter identification of a quayside container crane based on monitoring data

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (20) : 216-221.

QIN Xianrong, YU Chuanqiang, SUN Yuantao, ZONG Rui, ZHANG Qing

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Abstract

Aiming at modal parameter identification of a quayside container crane (QCC), based on monitoring data, the modal parameters of the QCC were identified by a covariance-driven stochastic subspace identification method (CSSI) in this paper.The main theory of this method and its algorithm were summarized, then, the parameters of the QCC were identified by the CSSI method with the stabilization diagram.The results reveal that this method can effectively identify the five modes of QCC within 1 Hz, the identified damping ratios are less than 3%, and the trolley (loading) has negligible effects on the modal results of the monitored QCC under different working states in an unworking plane, but has certain effects on the modal results in the working plane, i.e.lifting plane.

Key words

quayside container crane / stochastic subspace identification / structure monitoring / parameter identification / modal parameter

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QIN Xianrong, YU Chuanqiang, SUN Yuantao, ZONG Rui, ZHANG Qing. Modal parameter identification of a quayside container crane based on monitoring data[J]. Journal of Vibration and Shock, 2019, 38(20): 216-221

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