Control for suspended structure&rsquo;s swing vibration swing vibrationinduced by multi-hazard source excitation

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (23) : 25-32.

Control for suspended structure’s swing vibration swing vibrationinduced by multi-hazard source excitation

ZHANG Chunwei, WANG Hao

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Abstract

In traditional structural disaster prevention design, effects of various disasters on a structure are usually considered separately, and effects of multi-hazard are less considered.Aiming at swing vibration control problems of suspension structures, tuned mass damper (TMD) and active mass damper (AMD) can’t effectively perform swing vibration control.On the other side, the tuned rotary inertia damper (TRID) has problems of being sensitive to tuning parameters, very poor robustness and difficult to control swing vibration induced by multi-hazard source.Here, the active rotary inertia driver（ARID）system was proposed, the small type scaled model’s shaking-table test was designed, and the numerical analysis was performed using the software Simulink.Firstly, the dynamic equation for in-plane swing vibration of a suspended structure attached with an ARID system was established and linearized.Its control algorithm was designed based on LQR.Secondly, under action of five loadings including free vibration, sinusoidal one, sinusoidal sweep one, simulated earthquake one and simulated ocean wave one, structural small type scaled model tests were performed using a single-axis shaking table.Finally, Simulink was used to solve the dynamic equation under simulated multi-hazard source excitation.The numerical results were compared with those of shaking table tests.The results showed that the ARID system can be used to better realize structural swing vibration control; it exihibits good stability and robustness under multi-hazard source excitation; its feasibility is verified by shaking table tests.

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swing vibration control / active control / active rotary inertia driver (ARID) / multi-hazard source excitation / shaking table test

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ZHANG Chunwei, WANG Hao. Control for suspended structure’s swing vibration swing vibrationinduced by multi-hazard source excitation[J]. Journal of Vibration and Shock, 2019, 38(23): 25-32

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