Wheel–rail adhesion during torsional vibration of driven railway wheelsets

Trimpe, Fritz; Salander, Corinna

doi:10.1080/00423114.2020.1723652

Cited by 6 publications

(18 citation statements)

References 1 publication

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“…As drive and slip controls of modern railway vehicles enable operation close to the adhesion limit, they tolerate wheel slip. The occurrence of small wheel slippages is observed to be a major pre-condition of torsional vibration as documented by Trimpe and Salander [2]. In their article, Trimpe and Salander specifically document measured wheel-rail adhesion conditions occurring at torsional vibration events.…”

Section: Motivation Of the Model At Handmentioning

confidence: 91%

“…In the article at hand the model of Schwartz is reworked with state-of-the-art software tools to enable investigations on the physical origination conditions of torsional vibration of wheelset axles. As known from the measurements documented in [2], frequent changes of the wheel-rail adhesion conditions from strong to poor or vice versa lead to torsional vibration. With the original model of Schwartz, such adhesion changes cannot be implemented.…”

Section: Motivation Of the Model At Handmentioning

confidence: 95%

“…This is because the rather simplistic implementation of the wheel-rail contact of Schwartz does not enable frequent changes of the wheel-rail adhesion conditions. Such frequent changes are assumed to cause torsional vibration [2] and shall therefore be sufficiently modeled by the MBS model at hand.…”

Section: Mechanical Drive Trainmentioning

confidence: 99%

“…This detailed consideration of torsional vibration in the verification process is a German specialty, not known to be practiced by other regulatory authorities. More details about the verification procedure for railway axles in Germany can be found in [2].…”

Section: Introductionmentioning

confidence: 99%

“…The implementation of all these influences is covered by the method of Polach, which is verified by measurements [15]. The analytical description of the tangential forces in the wheel-rail contact point F considering the named influences is given by Equation (2).…”

mentioning

confidence: 99%

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Simulation of Torsional Vibration of Driven Railway Wheelsets Respecting the Drive Control Response on the Vibration Excitation in the Wheel-Rail Contact Point

et al. 2020

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For the stability verification of railway wheelsets in Germany, dynamic torsional stresses must be respected as they affect the axle and press fit stability of a wheelset. These dynamic stresses are applied to a wheelset by torsional vibration. However, dynamic stresses cannot be predicted by calculation, and so time-consuming and cost-intensive test runs are performed to measure the maximum dynamic stresses. Therefore, this article deals with the setup of a simulation model that shall enable the simulative prediction of maximum dynamic torsional stresses. This model respects that vibration excitation originates from the wheel-rail contact point and that the vibration energy input comes from a high-frequency drive train control. The first results show successful simulation of vibration excitation and correlations between adhesion change and maximum dynamic stresses.

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Section: Motivation Of the Model At Handmentioning

confidence: 91%

Section: Motivation Of the Model At Handmentioning

confidence: 95%

Section: Mechanical Drive Trainmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Simulation of Torsional Vibration of Driven Railway Wheelsets Respecting the Drive Control Response on the Vibration Excitation in the Wheel-Rail Contact Point

et al. 2020

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Explicit finite element simulations of dynamic low adhesion behavior between wheel and rail in the presence of high-frequency vibrations

Liu,

Huang,

et al. 2024

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PurposeDynamic low adhesion (DLA) has become an urgent problem for the high-speed wheel-rail system because of continuous decrease of adhesion redundancy in the past decades. This article aims to provide a simulation method to reveal the mechanism of DLA under high-frequency vibrations.Design/methodology/approachA transient wheel-rail rolling contact model is developed for a typical Chinese high-speed railway system using the explicit finite element (FE) method. Instantaneous adhesion exploitation levels are studied in the time domain, for which driving cases over corrugated rails are taken as an example. A speed up to 500 km/h is considered together with different traction coefficients and corrugation dimensions. DLA is expected when the instantaneous adhesion exploitation level reaches 1.0, that is adhesion saturates and full sliding contact occurs.FindingsThe instantaneous adhesion exploitation level can be very high in the presence of corrugation, even at low traction coefficients. DLA is found to occur as great vertical unloading takes place and causes a significant increase of creepage. An approach is further developed to determine the critical depth of corrugation over which DLA occurs.Originality/valueThis study employs the transient wheel-rail rolling contact model to predict the instantaneous adhesion exploitation level under high-frequency vibrations. The presented results reveal a mechanism of DLA being beneficial to guidelines for future railway practice.

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Torsional Vibration Suppression in Railway Traction Drives

et al. 2022

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Torsional vibrations phenomena are self-excited vibrations that occur in the wheelset of railway powertrains due to the counter-phase oscillation of both wheels. Long-lasting events of this type may lead to the catastrophic failures. Therefore, torsional vibration suppression and mitigation methods have drawn significant attention from the railway industry in the recent few years. Conventional vibration suppression methods reduce motor torque once the oscillation is detected. However, this can result in trip delays. Design of methods which do not compromise the traction capability is challenging. This paper proposes a novel torsional vibration suppression method using a Proportional-Resonant (PR) controller. The proposed method is insensitive to mechanical drive-train parameter variation neither requires adding new sensors to the wheelset. The method requires previous knowledge of the natural frequency of the wheelset torsional mode but this significantly reduces the implementation complexity suffered by other anti-vibration methods. Furthermore, the method will be shown to provide reduced sensitivity to slip velocities and wheelrail conditions.INDEX TERMS Railway traction drives, torsional vibrations, slip-stick phenomenon, slip control, fieldoriented control, proportional-resonant controller.

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Wheel–rail adhesion during torsional vibration of driven railway wheelsets

Cited by 6 publications

References 1 publication

Simulation of Torsional Vibration of Driven Railway Wheelsets Respecting the Drive Control Response on the Vibration Excitation in the Wheel-Rail Contact Point

Simulation of Torsional Vibration of Driven Railway Wheelsets Respecting the Drive Control Response on the Vibration Excitation in the Wheel-Rail Contact Point

Explicit finite element simulations of dynamic low adhesion behavior between wheel and rail in the presence of high-frequency vibrations

Torsional Vibration Suppression in Railway Traction Drives

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