An investigation of the dynamic behaviors of an MRE isolator subjected to constant and alternating currents

Shi, Haiyang; Yu, Miao; Zhu, Meifang; Fu, Jie; Choi, Seung‐Bok; Xing, Zhiwei

doi:10.1088/0964-1726/25/7/077002

Cited by 7 publications

(3 citation statements)

References 27 publications

(40 reference statements)

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“…Over the past two decades, magnetorheological elastomer (MRE) has gained considerable attention in many engineering applications [1][2][3][4][5][6][7][8]. Being a solid analogy of magnetorheological fluid (MRF), MRE demonstrated its superiority over MRF for its fast response time, no sedimentation and sealing issues, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Behrooz et al [5] reported a variable stiffness and damping isolator (VSDI) for vibration mitigation of structures. Shi et al [6] devised a vertical MRE isolator and investigated its dynamic behaviours when applied various current excitations. In civil engineering applications, Li et al [9] proposed a multilayer MRE base isolator for seismic protection of civil structures with more than 16 times increase in the stiffness.…”

Section: Introductionmentioning

confidence: 99%

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Investigations on response time of magnetorheological elastomer isolator for real-time control implementation

Gu¹,

Li²,

Li³

2016

Smart Mater. Struct.

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Utilizing the unique feature of MRE materials for vibration isolators has been intensively studied over the last several years. Real-time control of the MRE isolators holds the key to unlock MRE material's unique characteristics, i.e. instantly changeable shear modulus in continuous and reverse fashion. However, one of the critical issues for the applications of real-time control is the response time delay of MRE vibration isolators, which has not yet been fully addressed and studied. This paper identified the inherent response time of the MRE isolator and explored two feasible approaches to minimize the response time delay.Experiments were designed and conducted to evaluate the effectiveness of the proposed approaches on minimizing time delay on: i) the transient response of current of a large coil that generates magnetic field and ii) the transient response of shear force from the MRE isolator. The results show that the proposed approaches are effective and promising. For example, the proposed approach is able to reduce the force response time from 421ms to 52ms at rising and from 402 ms to 48ms falling edges, respectively. Such level of short response time of the MRE isolators demonstrates the feasibility of application of real-time control and hence is the essential step on the realization of real-time control of vibration suppression system based on MRE isolator.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigations on response time of magnetorheological elastomer isolator for real-time control implementation

Gu¹,

Li²,

Li³

2016

Smart Mater. Struct.

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“…3. The clutch disk torsional damper (Chen, 2005), Geislinger coupling (Xiang and Geng, 2004), dual-mass flywheel torsional damper (Song et al, 2012;Shi et al, 2009), and positive-negative stiffness parallel torsional damper can be mounted on the power transmission path to reduce the fluctuation torque of the system (Liu et al, 2018).…”

Section: New Materials New Structures and New Technology Canmentioning

confidence: 99%

A new magnetorheological elastomer torsional vibration absorber: structural design and performance test

et al. 2021

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Abstract. The semi-active torsional vibration absorber can effectively reduce the torsional vibration of the power-train system. In this paper, a new type of variable stiffness torsional vibration absorber with a magnetorheological elastomer (MRE) as an intelligent controlling element is designed, and the modal analysis, frequency-tracking scheme, and damping effects have been studied. A transient dynamic simulation is utilized to validate the rationality of the mechanical structure, the magnetic field parameters of the absorber are matched, and the magnetic circuit simulation analysis and the magnetic field supply analysis are carried out to verify the closed magnetic circuit. The principle prototype of the innovative vibration absorber is manufactured, the magnetic field strength of the absorber is tested by a Gauss meter, and the results show the efficacy of magnetizing the vibration absorber with a conductive slip ring by solving the magnetizing problem of the rotating parts of the vibration absorber. A special-purpose test rig with a torsional vibration exciter as a power source has been implemented. A comparative experiment has been carried out to test the frequency shift characteristics and authenticate the vibration-reduction effect of the new MRE torsional vibration absorber.

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Robust design of MR elastomer for optimal isolation against non-stationary ground motion

Das

Chakraborty

2021

Structures

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An investigation of the dynamic behaviors of an MRE isolator subjected to constant and alternating currents

Cited by 7 publications

References 27 publications

Investigations on response time of magnetorheological elastomer isolator for real-time control implementation

Investigations on response time of magnetorheological elastomer isolator for real-time control implementation

A new magnetorheological elastomer torsional vibration absorber: structural design and performance test

Robust design of MR elastomer for optimal isolation against non-stationary ground motion

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