Design and analysis of a magnetorheological damper for train suspension

Lau, Yiu-Kee; Liao, Wei-Hsin

doi:10.1117/12.540248

Cited by 7 publications

(7 citation statements)

References 12 publications

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“…Governing equations to model a railway vehicle with multiple degrees of freedom (generally, 17 degrees of freedom) and with integrated MR dampers have been developed, and the motion of a carbody simulated. [11][12][13][14] The obtained results indicate that a semi-active controlled MR damper-based suspension system is effective for use in railway vehicles. The carbody acceleration is significantly reduced, and the acceleration of the trucks and wheelsets can be increased to some extent.…”

Section: Introductionmentioning

confidence: 74%

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Twin-tube- and bypass-containing magneto-rheological damper for use in railway vehicles

Guo

Gong

Zong

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part F:

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A 9-kN magneto-rheological (MR) damper for lateral suspension control of a railway vehicle is created in this paper. The twin-tube style is adopted in order to obtain a long damper stroke and guarantee the symmetry of the output damping force. A bypass MR valve with a radial flow path is utilised to control the generated damping force. Three-dimensional finite element analysis studies are performed to determine the magnetic field strength inside the MR valve region. The MR damper is mathematically modelled for the situation of a unidirectional fluid flow in the chamber and valve. The test results indicate that the MR damper can produce a considerable range of dynamic force and can operate as a fail-safe device. Sedimentation is detected in the damper; however, the response time is acceptable for real-world deployment.

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Section: Introductionmentioning

confidence: 74%

“…Although several MR damper prototypes have been designed, practical MR dampers for railway vehicles are still rare. 11,15,21 In this paper, a practical MR damper for railway vehicles is designed, fabricated and tested. The twintube style and a bypass MR valve with radial flow path are adopted for the damper.…”

Section: Introductionmentioning

confidence: 99%

Twin-tube- and bypass-containing magneto-rheological damper for use in railway vehicles

Guo

Gong

Zong

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part F:

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show abstract

“…At a certain running speed, especially at higher speed levels, some vehicle components become extremely unstable due to resonance, and this can result in train instability. To reduce the vibration level and enhance stability, MR damper has been considered to be mounted in the train secondary suspension system [19], [20]. Unlike passive dampers, the dynamic properties of MR dampers are alterable by adjusting the current input to them.…”

Section: Introductionmentioning

confidence: 99%

A Full-Scale Experimental Investigation on Ride Comfort and Rolling Motion of High-Speed Train Equipped With MR Dampers

Alehashem

Ni²,

Liu

2021

IEEE Access

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The rail irregularities and wheel-rail interactions in a train running at high speeds may result in large-amplitude vibrations in the train's car body and affect passengers by reducing ride comfort. The train suspension systems have a crucial role in reducing the vibrations and improving ride comfort to an acceptable level. In this context, an exclusive magneto-rheological (MR) damper with a favorable dynamic range was designed and fabricated. The MR dampers were installed in a high-speed train's secondary lateral suspension system, replacing passive hydraulic dampers to mitigate vibration of the car body and keep the ride comfort level in a proper condition. A unique full-scale experimental investigation on the high-speed train equipped with MR dampers was carried out to evaluate the MR damper functionality in a real operating situation. The full-scale roller experiments were conducted in a vast range of speeds from 80 to 350 km/hr. At each speed, different currents were applied to the MR dampers. The car body dynamic responses were collected with accelerometers and displacement sensors mounted on the carriage floor and sidewall. To investigate the ride quality of the high-speed train, ride comfort indices and car body rolling motion are evaluated. Ride comfort indices under various train operating conditions are calculated through Sperling and UIC513 rules. This study reveals that the designed MR dampers effectively reduce the car body's rolling motion. According to Sperling ride comfort index, the car body vibration was "clearly noticeable" at some running speeds when adopting the MR dampers, but it was not unpleasant. Besides, a "very good comfort" was achieved according to the UIC513 ride comfort criterion. Also, no train instability was whatsoever observed at high speeds.INDEX TERMS High-speed train, MR damper, full-scale experiment, ride comfort index, rolling motion, secondary suspension system.

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“…The yield stress generated at this time is proportional to the strength of the applied magnetic field intensity [2]. MR shock absorber is a representative application that utilizes the characteristics of MR fluid and has been studied in various fields such as transportation [3][4][5], home appliances [6], and industrial machinery [7,8]. Carlson et al [9] firstly added a magnetic core to an existing monotube shock absorber in which MR fluid is filled instead of the hydraulic oil.…”

Section: Introductionmentioning

confidence: 99%

A new magnetic core model for magnetorheological fluid-based applications considering fringing effect of gap and magnetic nonlinearity of fluids

Yoon¹,

Kang²,

Choi³

2021

Smart Mater. Struct.

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This research aims to introduce a new magnetic core model for magnetorheological (MR) applications requiring high and wide controllable force. In general, the existing models linearize the magnetic behavior of magnetic cores for computational convenience. However, when MR applications such as MR damper require both high actuating force and relatively wide controllable force range, the nonlinearity of the magnetic properties becomes significant, which makes a big difference between the model and actual result. For this reason, the finite element method (FEM) is frequently adopted for modeling the magnetic cores, but it requires a lot of cost and time. To compensate for these disadvantages, a new nonlinear magnetic core model considering both the nonlinearity of the B–H curve of MR fluid and the fringing effect of the gap is proposed in this work. The approach is an extension of Kirchhoff’s law, which performs conformal mapping and backward calculation techniques. After formulating the analytical model, a magnetic core with specific parameters is designed as an illustrative example to validate the proposed model. It is shown through comparative investigations on the proposed model, linearization model, and FEM model that the proposed model is very effective to predict the high controllable force of MR applications.

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Design and analysis of a magnetorheological damper for train suspension

Cited by 7 publications

References 12 publications

Twin-tube- and bypass-containing magneto-rheological damper for use in railway vehicles

Twin-tube- and bypass-containing magneto-rheological damper for use in railway vehicles

A Full-Scale Experimental Investigation on Ride Comfort and Rolling Motion of High-Speed Train Equipped With MR Dampers

A new magnetic core model for magnetorheological fluid-based applications considering fringing effect of gap and magnetic nonlinearity of fluids

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