振动台与偏心负载相互作用的机理研究

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Abstract A transfer function matrix (TFM) is established to study the interaction mechanism between shaking table and eccentric load. The effects of mass ratio between eccentric load and shaking table, the moment of inertia ratio between eccentric load and shaking table, and the ratio of the distance from the center of gravity of load to the center of the shaking table to the distance from the exciter to the center of shaking table (eccentric distance ratio) on the TFM are investigated. The results show that the TFM is most sensitive to the change of the mass ratio, followed by the eccentric distance ratio and the moment of inertia ratio. Under the influence of the interaction between the shaking table and eccentric load, the effective frequency band of the shaking table decreases 71.13%, and the coupling between two exciters is amplified at least 37.15 times. Based on the above research, an extended form of real-time feedback control compensation strategy is proposed, and the effectiveness validation of the strategy in both frequency and time domain are conducted. The results show that the correlation coefficient of ground motion record of two exciters is improved by 14.04% and 4.78% respectively, and the strategy can compensate the interaction between shaking table and eccentric load effectively.

Key words： shaking table eccentric load shaking table-load interaction influence investigation real-time compensation

Received: 01 November 2021 Published: 15 February 2023

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	Articles by authors
	WANG Juke1
	LI Xiaojun2
	LIU Aiwen1
	CNEN Su2
	FU Lei1
	LI Fangfang3

Cite this article:

WANG Juke1,LI Xiaojun2,LIU Aiwen1, et al. Mechanism of interaction between shaking table and eccentric load[J]. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(3): 330-338.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I3/330

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