Development of a magnetorheological isolator with variable damping and variable stiffness for broadband vibration suppression

Yu, Jianqiang; Dong, Xiaomin; Qi, Song; Wang, Tao; Liang, Yuxuan

doi:10.1088/1361-665x/abd4fc

Cited by 18 publications

(10 citation statements)

References 33 publications

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“…where ∆W is the energy dissipation per cycle, F is the damping force, and x is the displacement of the top plate. When subjected to a harmonic excitation, the equivalent viscous damping coefficient of the GERF damper can be expressed as [42,43]:…”

Section: Damping Coefficient Identification Of the Gerf Dampermentioning

confidence: 99%

Modeling and analysis of a four-parameter vibration isolator with frequency-dependent damping and its implementation based on GERF

Wang

Liao

Peng

et al. 2023

Smart Mater. Struct.

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To improve the vibration isolation performance, a conventional passive two-parameter vibration isolator (VI) usually adopts the method of adding constant damping for energy dissipation. A compromise is made between the suppression of resonance peak and the rapid attenuation of transmissibility in the high-frequency band. A four-parameter-VI with frequency-dependent damping is a potential solution for this problem. The theoretical models of system transmissibility and equivalent damping are established by a normalization method, and the vibration isolation performance is compared with that of the two-parameter-VI and the three-parameter-VI. A novel four-parameter-VI with damping generated by a giant electrorheological fluid (GERF) damper is designed. The mechanical properties of the GERF damper are tested, and its damping effect is evaluated using an equivalent linearization method. Then, the vibration isolation performance of the four-parameter-VI is tested. The results show that: the vibration isolation performance of the four-parameter-VI can be affected by the damping ratio and the mass ratio. The four-parameter-VI exhibits the frequency-dependent damping characteristic of large damping in the low-frequency band and small damping in the high-frequency band by appropriately setting parameters. The vibration isolation ratio of the four-parameter-VI to white noise reaches 91.1% in the time domain with appropriate parameters, and the peak of the power spectral density curves decreases from 1.2e-3 g2/Hz to 0.16e-3 g2/Hz with a reduction of 1.04e-3 g2/Hz.

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Section: Damping Coefficient Identification Of the Gerf Dampermentioning

confidence: 99%

Modeling and analysis of a four-parameter vibration isolator with frequency-dependent damping and its implementation based on GERF

Wang

Liao

Peng

et al. 2023

Smart Mater. Struct.

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show abstract

“…For instance, it revealed that long-term suffering of drivers from vibration could induce diseases such as lumbago, backache, and lower-back pain [1,2]. To reduce the influence of the undesirable vibration, various methods have been developed to address it, such as vibration reduction by using advanced devices and control algorithms [3][4][5][6][7][8], vibration absorption by attaching absorbers to the vibration body [9][10][11], and vibration isolation by arranging isolators between the vibration source and the protected structure [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A new magnetorheological quasi-zero stiffness vibration isolation system with large zero stiffness range and highly stable characteristics

Deng

Sun

et al. 2023

Preprint

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Various quasi-zero stiffness (QZS) systems have been developed and applied in the vibration control domain in recent years. However, most QZS systems are usually unstable against external disturbances, and the QZS ranges of them are very limited. To address the above issues, this study develops a highly stable QZS vibration isolation system integrated with magnetorheological fluids (MRFs). The MRFs endow the vibration isolation system with stiffness variability in vertical and lateral directions against external disturbances, which innovatively solves the unstable problem of the QZS system. Meanwhile, the stiffness variability also makes the system adaptable to vibrations with different frequencies, so the system can deliver the best vibration isolation performance in response to various excitations. The system consists of a vertical isolation unit and a lateral isolation unit. Through paralleling a nonlinear positive stiffness QZS component with a nonlinear negative stiffness QZS component in the vertical isolation unit, a large QZS range in the vertical direction and smaller stiffness are realised, thus improving the vibration isolation performance. In this study, the vibration isolation system is designed and prototyped; its QZS characteristics and adjustable stiffness features in both the vertical and lateral directions are experimentally verified; the frequency responses of the system are obtained experimentally; the stability and the vibration isolation performance of the system are also evaluated by experiments. This study provides a solution to overcome the unstable problem of QZS systems and extend the limited QZS range, whilst realising QZS characteristics in both vertical and lateral directions, thus broadening the application of QZS systems.

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“…Jin et al [23] analyzed the vehicle dynamic performance of high-speed trains with different wheel-rail contact states using variable stiffness and damping semiactive suspension magnetorheological yaw dampers. Yu et al [24] devised the magnetorheological isolator with variable damping and variable stiffness (MR VDVS) and developed an algebraic parametric model to predict its hysteretic characteristics. Peng et al [25,26] found that cubic damping vibration isolator had advantages only in some special cases.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of a Variable Damping Isolator with Translating Cam

Wang

Xing

Shen

2022

Shock and Vibration

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A variable damping isolator based on a translating cam designed especially is proposed in this paper. The nonlinear variable damping isolator is mainly comprised of translating cam with a pair of rollers arranged symmetrically and horizontally and two linear dampers. The damping force of this isolator increases with the increase of its vertical displacement. The dynamic equation is established when the variable damping isolator is applied to the active isolation system under simple harmonic excitation. And the dynamic response of the equation is obtained by Harmonic Balance Method. After that, the numerical simulations are conducted to discuss the effects of the parameters of the isolation system on force transmissibility. The results show that the effects on attenuating the resonance and the force transmissibility in the region of high-frequency ratio are superior to that of the corresponding linear damping vibration isolator when appropriate design parameters (cam profile and damping coefficient of the horizontal linear damper) of the variable damping isolator are selected.

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Development of a magnetorheological isolator with variable damping and variable stiffness for broadband vibration suppression

Cited by 18 publications

References 33 publications

Modeling and analysis of a four-parameter vibration isolator with frequency-dependent damping and its implementation based on GERF

Modeling and analysis of a four-parameter vibration isolator with frequency-dependent damping and its implementation based on GERF

A new magnetorheological quasi-zero stiffness vibration isolation system with large zero stiffness range and highly stable characteristics

Dynamic Characteristics of a Variable Damping Isolator with Translating Cam

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