Automotive disc brake squeal

Kinkaid, Nathan; O’Reilly, Oliver M.; Papadopoulos, Panayiotis

doi:10.1016/s0022-460x(02)01573-0

Cited by 688 publications

(449 citation statements)

References 126 publications

Supporting

Mentioning

393

Contrasting

Unclassified

Order By: Relevance

“…In the stationary case, the trajectory of the geometrical center of B (1) is deflected mainly in direction n (1) c (normal direction of the active tooth flank). This is a result of the eccentrically acting contact force between the teeth.…”

Section: Resultsmentioning

confidence: 99%

“…To derive differential equations which describe the behaviour, first a Hamilton functional H is set up which takes into account all participating components. During the shifting process, the gear input shaft, the clutch disc and the gear stick together, thus they are one rigid body B (1) (mass m 1 , inertia J 1 ). This component has a rotational DoFφ (1) e z and all translational DoFs u (1) .…”

Section: Modellingmentioning

confidence: 99%

“…Thus, for this body, the kinetic energy T G , the stored energy in the bearing U B and the dissipation δW B Diss contribute to H. Gear flanks on B (1) and B (2) have no penetration. This condition results in a nonholonomic constraint 0 = n (1) c · v rel as a simple but adequate gear model [4], where the Lagrange multiplier is the contact normal force. Friction effects in the gears and the influence of the flank stiffness are neglected.…”

Section: Modellingmentioning

confidence: 99%

“…They have been studied in models of simple structure like 1-DoFoscillators as well as in more complex ones like automotive disc brakes [1]. Low-frequency vibrations often arise because of the Stribeck effect, whereas the reason for higher frequency vibrations usually is a mode-coupling flutter instability.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

On the influence of the lamella's elasticity on self‐excited vibrations in gearboxes

Jehle

Fidlin

2016

Proc Appl Math and Mech

View full text Add to dashboard Cite

Eek noise in a gearbox of a vehicle drivetrain is a phenomenon, which can arise while shifting between gears and which is not accepted by customers. Beneath audible squeaking, it can cause damage of mechanical components. There is a wide range of possible reasons for the occurrence of this effect, which strongly depends on properties of the considered gearbox (physical parameters, geometry, operation, ...). From the mathematical point of view, the occurrence can be predicted using linear stability analysis of the stationary behaviour of a physically motivated gearbox model. The components of a gearbox are clutch discs being in contact, gears and elastically supported shafts. In this contribution, a rigid multibody model of the device [4] is extended by the elastic modelling of the motor's side disc (rotating Kirchhoff plate). The aim of the overall system is to analyze the shifting process. The analysis reveals that beneath instability mechanisms which are known from systems with rigid bodies, new instabilities occur incorporating of out-of-plane vibrations of the plate. In a reasonable parameter region, the first two unsymmetrical modes of the lamella have the main contribution to the instability.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Modellingmentioning

confidence: 99%

Section: Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the influence of the lamella's elasticity on self‐excited vibrations in gearboxes

Jehle

Fidlin

2016

Proc Appl Math and Mech

View full text Add to dashboard Cite

show abstract

“…The annoying noise can cause customers to doubt the quality of their automobiles. Friction-induced vibration has been generally accepted as the main reason for brake squeal [1][2][3][4]. Another consequence of friction-induced disc vibration is data losses of a computer hard disc drive because of its undesirable vibration.…”

Section: Introductionmentioning

confidence: 99%

Friction-induced vibration of an elastic disc and a moving slider with separation and reattachment

Ouyang

Guan

2016

Nonlinear Dyn

View full text Add to dashboard Cite

The transverse vibration of an elastic disc, excited by a preloaded mass-damper-spring slider dragged around on the disc surface at a constant rotating speed and undergoing in-plane stick-slip oscillation due to friction, is studied. As the vertical vibration of the slider grows at certain conditions, it can separate from the disc and then reattach to the disc. Numerical simulation results show that separation and reattachment between the slider and the disc could occur in a low speed range well below the critical disc speed in the context of a rotating load. Rich nonlinear dynamic behaviour is discovered. Time-frequency analysis reveals the time-varying properties of this system and the contributions of separation and in-plane stick-slip vibration to the system frequencies. One major finding is that ignoring separation, as is usually done, often leads to very different dynamic behaviour and possibly misleading results.

show abstract

A minimal model for the influence of equilibrium positions on brake squeal

2023

View full text Add to dashboard Cite

The phenomenon brake squeal has been an ongoing topic for decades, both in the automotive industry and in science. Although there is agreement on the excitation mechanism of brake squeal, namely self‐excitation due to frictional forces between the disk and the pad, in the subject of squeal it is very complex to discover all relevant effects and to take them into account. Several of these problems are related to nonlinearities, for example, in the contact between pad and disk or drum or in the behavior of the brake pad material. One of these nonlinear effects, which has been almost completely neglected so far, is that the brake can engage, mainly due to the bushing and joint elements within the brake, different equilibrium positions. This in fact has serious influence on the noise behavior as shown in experimental studies. For example, it is observed in experiments that, despite identical operating parameters, squeal sometimes occurs and sometimes not. In initial experimental studies, this could be related to the engaged equilibrium position. Following these experimental studies, the present paper introduces a minimal model by extending the well‐known minimal model by Hoffmann et al. by corresponding elements and nonlinearities allowing the system to engage different equilibrium positions. As will be presented, the stability behavior strongly depends on the engaged equilibrium position. Therefore, the minimal model represents the key experimentally observed issues. Additionally, a limit cycle behavior can also be observed.

show abstract

Automotive disc brake squeal

Cited by 688 publications

References 126 publications

On the influence of the lamella's elasticity on self‐excited vibrations in gearboxes

On the influence of the lamella's elasticity on self‐excited vibrations in gearboxes

Friction-induced vibration of an elastic disc and a moving slider with separation and reattachment

A minimal model for the influence of equilibrium positions on brake squeal

Contact Info

Product

Resources

About