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 16 publications

(6 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.

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“…A Kelvin-Voigt system is used to model the primary suspension corresponding to an axle, and the secondary suspension corresponding to a bogie is also represented by a single Kelvin-Voigt system; both systems work on translation in the vertical direction. Such models are frequently found in studies on the reduction or control of vertical vibrations of the railway vehicle [21][22][23][24][25], particularly of high-speed railway vehicles [26][27][28][29][30][31][32][33], in studies aimed at improving ride comfort and ride quality [34][35][36][37][38][39], or in those regarding the influence of car body vibrations on the dynamic interaction in the pantograph-catenary system [40,41].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Suspension Model in the Simulation of the Vertical Vibration Behavior of the Railway Vehicle Car Body

2023

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The evaluation of the vibration behavior of railway vehicle car bodies based on the results of numerical simulations requires the adoption of an appropriate theoretical model of the suspension which considers the important factors that influence the vibration level of the car body. In this paper, the influence of the secondary suspension model on the vertical vibration behavior of the railway vehicle car body is investigated, based on the results of numerical simulations on the frequency response functions of the acceleration, the power spectral density of the acceleration and the root mean square of the acceleration of the car body. Numerical simulation applications are developed based on a rigid-flexible coupled vehicle model with seven degrees of freedom, corresponding to car body vibration modes: bounce, pitch, and first vertical bending mode, and bogie vibration modes: bounce and pitch. Four different models of secondary suspension are integrated into the vehicle model, namely a reference model and four analysis models. Analysis models include systems through which the pitch vibration of the bogies is transmitted to the car body, influencing its vibration behavior and, respectively, a system that takes the relative angular displacement between the car body and the bogie and a system that models the transmission system of the longitudinal forces between the bogie and the car body are analyzed. The effects of these two systems on the vibration behavior of the railway vehicle car body are analyzed both for each system separately and together. In the conclusions of the paper, the influence of the secondary suspension model on the vibration level at the resonance frequencies of the vertical bending of the car body and the pitch of the bogie is pointed out. It also highlights the important contribution of the transmission system of the longitudinal forces between the bogie and the car body in transmitting pitch vibrations of the bogies to the car body, with effects on the vibration level of the car body at high speeds.

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

Cited by 16 publications

References 10 publications

A magnetorheological vibration absorber with bidirectional tunability for pipelines

A magnetorheological vibration absorber with bidirectional tunability for pipelines

Influence of the Suspension Model in the Simulation of the Vertical Vibration Behavior of the Railway Vehicle Car Body

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

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