Study on the vibration suppression of a flexible carbody for urban railway vehicles with a magnetorheological elastomer-based dynamic vibration absorber

Wen, Yuzhen; Sun, Qian; Zhang, Yu; You, Haoming

doi:10.1177/0954409719865370

Cited by 11 publications

(4 citation statements)

References 10 publications

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“…These works showed the frequency shifting characteristic of MREbased DVA, but they lacked any actual vibration absorption effect demonstration. Wen et al [18] designed a MRE-based DVA for urban railway vehicles. The design method and working principals were thoroughly introduced and a multiple regression analysis was done to seek the optimal frequency.…”

Section: Introductionmentioning

confidence: 99%

A magnetorheological vibration absorber with bidirectional tunability for pipelines

Xie,

Fu,

Zhu

et al. 2023

Smart Mater. Struct.

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Magnetorheological elastomer (MRE) had been employed as a tunable stiffness element in dynamic vibration absorber (DVA) due to its remarkable magnetic tunability. However, the natural frequency of MRE-based DVA could only be tuned towards high frequency under magnetic fields, which failed to solve or even exacerbate the low-frequency pipeline vibration. To tackle this issue, an innovative DVA (H-DVA) with bi-directional magnetic tunability was proposed in this paper. The hard magnetic MRE filled by NdFeB particles was selected as the core tunable stiffness element in H-DVA. Besides, the discretization distribution design scheme for the mass oscillators was adopted to improve the flexibility of H-DVA. Then, the magnetic field simulation and resonance frequency shifting test of H-DVA under different magnetic fields were completed to validate the bi-directional magnetic tunability. Lastly, the vibration absorption effect was verified in a self-established experimental pipeline system. The experiment results demonstrated that the resonance frequency of the proposed H-DVA exhibited a maximum frequency shift of approximately -2.7Hz under reversed magnetic field. Compared to H-DVA working in zero field state, the acceleration magnitude of pipeline vibration was furtherly reduced by 8.8% when applying -1.5A to H-DVA under 55Hz excitation. Similarly, the acceleration magnitude was furtherly reduced by 22.2% when applying 2A to H-DVA under 85Hz excitation. Thus, these findings confirmed that the H-DVA proposed in this paper not only achieved the bi-directional magnetic tunability, but also improved the vibration absorption effect for pipeline vibration.

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Section: Introductionmentioning

confidence: 99%

A magnetorheological vibration absorber with bidirectional tunability for pipelines

Xie,

Fu,

Zhu

et al. 2023

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…Polymer-based hybrid materials containing magnetizable particles allow the control of vibration, stiffness, and energy dissipation by means of dispersion and/or orientation of hard inorganic fillers (Ginder et al, 2000; Kwon et al, 2018). In addition, these materials possess tunable viscoelastic properties when an external magnetic field is applied (Khairi et al, 2019); hence, they are of particular interest as magnetorheological elastomers (MREs) for innovative material applications like deformable wings, absorbers, seismic systems, dampers, and engine mounts (Ahamed et al, 2018; Bastola and Hossain, 2020; Carlson and Jolly, 2000; Chen et al, 2016; Deng and Gong, 2007, 2008; Eshaghi et al, 2016; Hoang et al, 2009; Jolly et al, 1996a; Komatsuzaki and Iwata, 2015; Komatsuzaki et al, 2016; Ni et al, 2010; Sinko et al, 2013; Wen et al, 2020b).…”

Section: Introductionmentioning

confidence: 99%

Influence of pre-structure orientation on the linear viscoelastic limit of magnetorheological elastomers

Sulatchaneenopdon

Son

Kantachawana

et al. 2022

Journal of Intelligent Material Systems and Structures

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Magnetorheological elastomers (MREs) have been developed as a new class of smart materials for such diverse applications as adaptive vibration control of systems and energy dissipation. The linear viscoelastic (LVE) behavior of MREs is expected to play a significant role in determining filler morphology (structure, size, and aspect ratio) and working conditions. The LVE behavior of pre-structures, especially anisotropic structures, has not been clearly explained. To this end, this study aimed to analyze the LVE behavior and dynamic properties according to different pre-structures of magnetic particles. This is based on MRE pre-structures oriented at 0°, 30°, 45°, and 90° using oscillatory shear excitation as a function of frequency and amplitude sweep tests. For the latter, the excitation frequency and magnetic field intensity were analyzed. These analyses were performed for both storage modulus and loss factor corresponding to 10% strain amplitude from the roughly level linear line of the LVE region. The results showed that increasing the frequency or magnetic field intensity to increase anisotropy reduced the LVE limit. For every oriented pre-structure and analyzed frequency tested, the magnetic field decreased the LVE limit. Thus, the orientation of the carbonyl iron particles in the matrix enhanced the viscoelastic properties.

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“…Different applied magnetic field strengths can control the dynamic mechanical properties such as the obtained MRE's storage modulus and damping factor [4,5]. Because of the exhibited magnetorheological effect, this intelligent and safe material can be widely used in dampers [6,7], soft armors [8], impact absorbers [9][10][11][12], and other applications such as shielding [13,14], force sensing [15,16], and medical systems [17,18]. However, due to the contradiction between the magnetorheological effect and mechanical properties induced by cross-linking degree of polymer rubber matrix [19], it is challenging to obtain MRE samples with excellent magnetorheological effect.…”

Section: Introductionmentioning

confidence: 99%

The Normal Force Characteristic of a Novel Magnetorheological Elastomer Based on Butadiene Rubber Matrix Compounded with the Self-Fabricated Silly Putty

Guo

2021

Advances in Materials Science and Engineering

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In this paper, a novel magnetorheological elastomer (MRE) was prepared by dispersing carbonyl iron particles (CIPs) into a composite matrix compounded by butadiene rubber (BR) and self-fabricated Silly Putty. The rate-sensitive and magneto-induced characteristics of normal force were experimental investigated to discuss the working mechanism. The results demonstrated that the normal force increased with the compression rate and the mass fraction of boron-silicon copolymer added to the composite matrix due to the formation of the more and more B-O cross bonds which could be blocked in the C-C cross-linked network of BR. Meanwhile, the magneto-induced normal force was positively correlated with the applied magnetic field strength and the compression strain due to the decreased gap between the centers of soft magnetic particles and the increased particle intensity of magnetization. Moreover, the magneto-induced normal force continued to enhance with the increase of compression strain because the CIP chains fixed in the C-C cross-linked network could bend to a radian and CIP chains in B-O cross-linked network could rupture to form more stable and intensive short-chain structures. Besides, a simplified model was deduced to characterize the mechanism of the generation of the magneto-induced normal force. Furthermore, the normal force varied stably with the oscillatory shear strain (less than 9%) at different magnetic induction intensities and suddenly reduced when the applied oscillatory shear strain was more than 9%.

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Study on the vibration suppression of a flexible carbody for urban railway vehicles with a magnetorheological elastomer-based dynamic vibration absorber

Cited by 11 publications

References 10 publications

A magnetorheological vibration absorber with bidirectional tunability for pipelines

A magnetorheological vibration absorber with bidirectional tunability for pipelines

Influence of pre-structure orientation on the linear viscoelastic limit of magnetorheological elastomers

The Normal Force Characteristic of a Novel Magnetorheological Elastomer Based on Butadiene Rubber Matrix Compounded with the Self-Fabricated Silly Putty

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