多层磁场旋转式电涡流惯容阻尼器力学性能研究

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Abstract To improve the output damping force of the eddy current damper, a multilayer magnetic field rotary eddy current inertial damper (MMF-RECID) is proposed. The mechanical properties of MMF-RECID were experimentally studied, and the finite element simulations were carried out. Firstly, the structure of the MMF-RECID is described, and the calculation formulas of the axial force of MMF-RECID is derived. Then, the MMF-RECID specimen is described in detail, the inertial effect and energy dissipation hysteresis performance of MMF-RECID under recycled axial loading are investigated, and the axial force composition of the MMF-RECID is analyzed. By the ANSOFT Maxwell software, the three-dimensional transient numerical simulations of eddy current damping of MMF-RECID are carried out. Finally, the earthquake-reduction effect of a single-degree-of-freedom structure equipped with MMF-RECID is analyzed. The results show that: (1) the ball screw system of MMF-RECID realizes the multiplicative effect of inertia mass and eddy current damping force, the eddy current damping force of multi-layer magnetic field versus a single-layer magnetic field conforms to the law of linear superposition, and the hysteresis curves are stable and full; (2) the loading frequency will change the main axis slope of the MMF-RECID hysteresis curve and the composition ratio of the axial forces; (3) the results of the ANSOFT Maxwell three-dimensional transient simulation are consistent with the experimental results; (4) MMF-RECID has a good damping performance with high energy density, and has promising engineering practicability.

Key words： eddy current damping inertial mass multilayer magnetic field experimental study transient simulation

Received: 07 November 2022 Published: 15 October 2023

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	XIA Wanqiu
	LU Liang

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XIA Wanqiu,LU Liang. Mechanical properties of multilayer magnetic field rotating eddy current inertial damper[J]. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(19): 89-95.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I19/89

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