Wheel/rail noise—Part II: Wheel squeal

Rudd, Michael

doi:10.1016/0022-460x(76)90862-2

“…Some field tests were conducted, and it was found that the SPL of squeal increases with the curvature of the rail and the rolling speed of the wheel. 1 Recently, similar effect on curve squeal was also observed in the field testing in Australia. 2 A laboratory test found that the SPL of wheel squeal increases with rolling speed and angle of attack.…”

Section: Introductionsupporting

confidence: 57%

“…The submodel of contact mechanics is based on the models developed previously, 1,5,6,8 which integrates the effect of angle of attack, rolling speed, material and geometric characteristics. The creepage-dependent friction coefficient of the rolling contact ȝ(ȗ) can be expressed as …”

Section: Theoretical Modellingmentioning

confidence: 99%

The modeling of wheel squeal in the time domain and its validation

Liu

¹

,

Meehan

²

2013

The Journal of the Acoustical Society of America

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The sound pressure level of wheel squeal has been shown to increase with the angle of attack and rolling speed in both field and laboratory tests, but the causes behind the manner of increase are still unknown. To investigate this, a model in the time domain was extended by utilising nonlinear rolling contact theory developed specially for wheel squeal. This model is used to simulate the vibration velocity of a testrig wheel at different rolling speed and angle of attack. The results correlate well with the recorded sound pressure level of wheel squeal in laboratory tests. It was found that due to the interaction of wheel vibration with lateral force and lateral creepage the vibration velocity amplitude of the wheel increases with angle of attack and rolling speed increases. This explains why the sound pressure level of wheel squeal also increases in the same manner. The phenomenon is explained theoretically using the mechanics based model.

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“…the linear damping coefficient, as our primary control parameter in a range from −04 to +06. In this range the velocity dependent force changes its shape in a way such that for low  1 values a negative damping is introduced, which is often used in the literature to model self-excited vibrations, such as in fluid-or friction-induced flutter [28] or squeal [29].…”

Section: The Mechanical Systemmentioning

confidence: 99%

Snaking bifurcations in a self-excited oscillator chain with cyclic symmetry

Papangelo

¹

,

Grolet

²

,

Salles

³

et al. 2017

Communications in Nonlinear Science and Numerical Simulation

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Snaking bifurcations in a chain of mechanical oscillators are studied. The individual oscillators are weakly nonlinear and subject to self-excitation and subcritical Hopf-bifurcations with some parameter ranges yielding bistability. When the oscillators are coupled to their neighbours, snaking bifurcations result, corresponding to localised vibration states. The snaking patterns do seem to be more complex than in previously studied continuous systems, comprising a plethora of isolated branches and also a large number of similar but not identical states, originating from the weak coupling of the phases of the individual oscillators.

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“…In this paper, the contact mechanics submodel is based on the models of contact forces in the lateral direction, 1,5,6 while the vibration submodel is from a modal vibration model of the wheel. 7 The lateral force and the normal force in rolling contact can be measured simultaneously with a unique method developed on a rolling contact twin disk testrig, so as to determine the lateral adhesion ratio reliably.…”

Section: Introductionmentioning

confidence: 99%

The modeling of wheel squeal in the time domain and its validation

Liu

¹

,

Meehan

²

2013

Proceedings of Meetings on Acoustics

1

0

View full text Add to dashboard Cite

The sound pressure level of wheel squeal has been shown to increase with the angle of attack and rolling speed in both field and laboratory tests, but the causes behind the manner of increase are still unknown. To investigate this, a model in the time domain was extended by utilising nonlinear rolling contact theory developed specially for wheel squeal. This model is used to simulate the vibration velocity of a testrig wheel at different rolling speed and angle of attack. The results correlate well with the recorded sound pressure level of wheel squeal in laboratory tests. It was found that due to the interaction of wheel vibration with lateral force and lateral creepage the vibration velocity amplitude of the wheel increases with angle of attack and rolling speed increases. This explains why the sound pressure level of wheel squeal also increases in the same manner. The phenomenon is explained theoretically using the mechanics based model.

show abstract

Wheel/rail noise—Part II: Wheel squeal

Cited by 130 publications

References 0 publications

The modeling of wheel squeal in the time domain and its validation

The modeling of wheel squeal in the time domain and its validation

Snaking bifurcations in a self-excited oscillator chain with cyclic symmetry

The modeling of wheel squeal in the time domain and its validation

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