Effect of moderating friction of wheel/rail interface on vehicle/track dynamic behaviour

Ishida, Masaharu; Ban, Takahiko; Iida, Kohei; Ishida, Hiroaki; Aoki, Fusayoshi

doi:10.1016/j.wear.2008.02.041

Cited by 35 publications

(24 citation statements)

References 10 publications

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“…Note that we only take into account the loads in position 1 of all units in the train. This is reasonable since they are the only loads in spine or flat cars; and for well cars, the upper level gaps have a more significant aerodynamic effect than the lower level gaps (23,24,25). A schematic representation is given in Figure 3.…”

Section: Static Aerodynamic Efficiency Modelmentioning

confidence: 87%

“…Esveld Consulting Services, Netherlands [22,23,24] DIFF CHARMEC, Sweden [7,8,9] DTRACK DynTrack Systems, Canada & USA [5,6] NUCARS™ * AAR, TTCI, USA [10] SUBTTI Technical University of Berlin, Germany [11,12] VIA University of Valencia, Spain [25] * The NUCARS™ model used in this 2 nd stage was a beta version which was not commercially available at time of writing.…”

Section: Dartsmentioning

confidence: 99%

“…Also, the influence of wheel/rail lubrication as one of main methods of reducing friction on vehicle/track dynamic behaviour has been evaluated by vehicle running experiments with track site and/or on-board measurements, and some vehicle dynamic simulator [19]- [24]. This paper describes the development of friction moderating system which consists of solid lubricant called friction moderator with positive slope of the characteristics of traction coefficient less than the friction modifier and a jetting system installed on vehicle which supplies the friction moderator to wheel/rail interface [19], [23], [25], [26] …”

Section: Introductionmentioning

confidence: 99%

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Performance-based track geometry and the track geometry interaction map

Liu

Magel

2008

Proceedings of the Institution of Mechanical Engineers, Part F:

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The track geometry interaction map (TGIM) is proposed as an effective way to evaluate the impact of multiple track geometry parameters on rail safety. Multi-body dynamics software has been used to simulate vehicle performance over tracks containing a large number of randomly generated lateral and vertical track geometry combinations. A TGIM-based safety threshold is generated that appears to offer both economic and safety advantages over the current Federal Railroad Administration track safety standards.

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Section: Static Aerodynamic Efficiency Modelmentioning

confidence: 87%

Section: Dartsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance-based track geometry and the track geometry interaction map

Liu

Magel

2008

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…Therefore, the unbalanced centrifugal force will occur on the wheelset during rotating, due to the wheelset unbalance. The centrifugal force is one of the important influence factors causing bearing wear, vehicle noise and vibration, and even destructive accidents [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Influence of dynamic unbalance of wheelsets on the dynamic performance of high-speed cars

Wang

Kang

Xiao-wen³

et al. 2011

J. Mod. Transport.

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With further increasing in running speed of newer high-speed EMUs (electric multiple units), higher demand for wheelset dynamic balance is required. In order to study the influence of the dynamic unbalance of wheelset on the stability, ride quality, and curving performance for a high-speed car, a detailed dynamic model of a high-speed EMU car is established using the software SIMPACK. The analysis results indicate that the dynamic unbalance of the wheelset significantly influences the dynamic performance of the high-speed car. The increase in dynamic unbalance of the wheelset will decrease the hunting critical speed, worsen the vertical ride quality, and increase the wheelset lateral force, derailment coefficient, and wheel unloading ratio. Therefore, in order to improve the stability, ride quality, and running safety of high-speed car, the values of dynamic unbalance of wheelset should be strictly controlled in manufacturing, and periodically monitored in operation.

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“…are often applied to wheel flanges and rail gauge corners. These lubricants are supplied from an on-board applicator when the vehicle's body tilts on a curve, or from a trackside applicator for every several vehicles passing by [1,2]. Among the various lubricants used, oil is the most popular as a wheel/rail lubricant because of the excellent anti-wear properties derived from its low coefficient of friction.…”

mentioning

confidence: 99%