Local control of noise and vibration with KELTRACK™ friction modifier and Protector® trackside application: an integrated solution

Eadie, Donald T.; Santoro, Marco; Powell, W.D.

doi:10.1016/s0022-460x(03)00739-9

Cited by 30 publications

(19 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The use of top of rail friction modifiers to control the frictional characteristics of the wheel-rail interface is an emerging technology. Early results on noise control were reported by Eadie et al [7]. The effect of friction modifiers on the spectral noise characteristics in curves for different wheel rail systems has been described [2].…”

Section: Introductionmentioning

confidence: 99%

Top-of-rail friction control for curve noise mitigation and corrugation rate reduction

Eadie¹,

Santoro²

2006

Journal of Sound and Vibration

Self Cite

View full text Add to dashboard Cite

Top of rail Friction Modifiers are designed to control frictional characteristics at the wheel-rail interface that influence noise, corrugations, and lateral forces. Key characteristics of the resulting thin film are 1) controlled intermediate coefficient of friction and 2) positive friction, to reduce rollslip oscillations related to both curve squeal noise and short pitch corrugation development. Practical results are presented on the effect of friction modifiers on curve squeal and flanging noise generation at a range of European mass transit sites. Noise reductions ranging from 6.3 to 22.8 dBA were recorded, with an average reduction across the different test sites of 12.0 dBA. Both top of rail squeal and flanging components of noise were reduced.The effect of friction modifier on short pitch corrugation development was evaluated over several years at two curves at Metro Bilbao. Under conditions where corrugations grew from 0.01 mm to 0.05 mm in eighteen months under baseline conditions, with application of friction modifier essentially no corrugation growth occurred in an equivalent time period.

show abstract

Section: Introductionmentioning

confidence: 99%

Top-of-rail friction control for curve noise mitigation and corrugation rate reduction

Eadie¹,

Santoro²

2006

Journal of Sound and Vibration

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the cases where net frictional coefficients are lower than the optimum, wheel-slips occur during rapid acceleration of trains and wheels skid over the rails during emergency braking situations. The key aspect for operational safety of trains is to maintain an optimum coefficient of friction at the wheel-rail interfaces, at about a value of 0.35 [1]. When the operational conditions imposed by the combination of railway loading and rail profiles deliver nonoptimum coefficients of friction, friction modifiers shall be used for maintaining the traction necessary for safe operation of the trains.…”

Section: Introductionmentioning

confidence: 99%

Influence of train axle load on wheel-rail interface friction

Khan

Dasaka

2018

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Abstract. The implementation of high speed railways in India are in their early phases and vast studies are being conducted for the effective implementation of the system. Maintaining the traction required for efficient operation of trains at high speeds requires the net minimum frictional coefficient to be maintained at the wheel-rail interface, across the desired range of axle loads and target speeds of train operation. With the increase in speed, wheels of the train tend to lift-off, effectively reducing the interface friction at the wheel-rail contact. In this study, the effect of increasing the axle load on the effective frictional coefficient available at wheelrail interfaces during high speed railway operations were quantified by numerical simulations, and the results reveal that the net frictional coefficient available at the wheel-rail contacts have a trend to increase with an increase in the applied axle loads. Conversely, this instead points out that decreasing the axle loads for achieving higher speeds of train operation will result in reduction of traction, and there will be chances of wheel-slips on the rails during rapid acceleration and emergency braking situations. Modifying the rail surface friction using top-ofrail friction modifiers are a much easier alternative to making amendments in the wheel-rail profiles, for maintaining sufficient traction on rails. In the wheel-rail interfaces with high friction, lubrications in the boundary regime, mixed lubrication or hydrodynamic lubrication are applied on the basis of Stribeck curve, adopting the optimum frictional coefficients for avoiding rolling contact fatigue and high rates of wear due to plastic deformations. When there is less frictional grip, a coating of top-of-rail positive friction enhancers becomes necessary, for increasing the adhesion characteristics and achieving positive creep. This study emphasizes the importance of optimizing the contact at wheel-rail interfaces, to maintain the frictional coefficients to neither cause loss of traction due to lower grip, nor be on the higher side to cause rolling contact fatigue and high rates of material wear.

show abstract

“…The effects, depending on the modifier used, are reduced wear, increased adhesion or reduced corrugations and noise [1,2].…”

Section: Introductionmentioning

confidence: 99%

Investigation of mechanical properties of water-based friction modifier for railway applications

Piotrowski

2003

Comptes Rendus. Mécanique

View full text Add to dashboard Cite

Local control of noise and vibration with KELTRACK™ friction modifier and Protector® trackside application: an integrated solution

Cited by 30 publications

References 10 publications

Top-of-rail friction control for curve noise mitigation and corrugation rate reduction

Top-of-rail friction control for curve noise mitigation and corrugation rate reduction

Influence of train axle load on wheel-rail interface friction

Investigation of mechanical properties of water-based friction modifier for railway applications

Contact Info

Product

Resources

About