Modeling of automotive drum brakes for squeal and parameter sensitivity analysis

Huang, Jinchun; Krousgrill, Charles M.; Bajaj, Anil K.

doi:10.1016/j.jsv.2005.02.007

Cited by 83 publications

(62 citation statements)

References 7 publications

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“…Moreover, MD and ME deal with disc doublet modes [1,32]. The two pairs of modes, MB − MC and MD − ME, may be named "compatible" modes, as used by Huang et al in [30]. Looking back on Figure 13, this point is confirmed since MB −MC and MD−ME are coupled as the friction coefficient increases.…”

Section: Mementioning

confidence: 90%

“…The second term in Equation 2 may be obtained analytically by expanding the friction force as a function of the displacements of the contact nodes. This point, which will not be presented here for the sake of brevity, is based on the Coulomb law [30]. The undamped and frictionless case, defined in Equation 3, is noteworthy because it involves a symmetric stiffness matrix and therefore does not require a complex solver.…”

Section: Methodsmentioning

confidence: 99%

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Investigation of the relationship between damping and mode-coupling patterns in case of brake squeal

Fritz

Sinou

Duffal

et al. 2007

Journal of Sound and Vibration

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International audienceBrake squeal is a friction induced instability phenomenon that has to be addressed during the development process. The mechanism is considered a mode coupling phenomenon also referred to as coalescence. The system eigenvalues have been computed using a technique based on the finite element method. The coalescence patterns were then determined in relation to the friction coefficient. The effects of damping on the coalescence patterns have been investigated. If the two modes involved in the coalescence are equally damped, a "lowering effect" that tends to stabilize the system is observed. If the two modes are not equally damped, both "lowering" and "smoothing" effects occur. If the "smoothing effect" prevails, added damping may act in an unintuitive way by destabilizing the system. To further study this point, stability areas have been plotted and a metric is proposed to find the most stable configuration in terms of damping distribution. In the squeal frequency range, coalescence patterns often involve more than two modes. In this case, the effect of damping is far more complicated since several modes are coupled both in terms of friction and damping

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Section: Mementioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Investigation of the relationship between damping and mode-coupling patterns in case of brake squeal

Fritz

Sinou

Duffal

et al. 2007

Journal of Sound and Vibration

View full text Add to dashboard Cite

show abstract

“…The study of sensitivity in disc-pad systems is now attracting the attention of research community (see e.g. [128,129,126,130,127]). In [131], to take the uncertainties into account, descriptive statistical analysis tools were used.…”

Section: Hammeringmentioning

confidence: 99%

Overview of disc brakes and related phenomena - a review

Rashid

2014

IJVNV

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Disc brakes have evolved over time to be a reliable method of decelerating and stopping a vehicle. There have been different designs of disc brake systems for different applications. This review gives a detailed description of different geometries of the components and the materials used in a disc brake system. In spite of all the improvements, there are still many operational issues related to disc brakes that need to be understood in a greater detail and resolved. There has been a lot of research going on about these issues and at the same time different methods are being proposed to eliminate or reduce them. There has also been an intensive fundamental research going on about the evolution of tribological interface of disc-pad system. One major purpose of the present paper is to give a comprehensive overview of all such developments.

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“…For the sake of brevity, the procedure to compute K Friction will not be presented here (cf [20], [21], [22] and [23]). The undamped non-friction case is noteworthy, because FEM softwares can easily solve equation 1 in that case by computing the normal modes of the brake.…”

Section: Modal Equation Computed From Fe Modelmentioning

confidence: 99%

Effects of damping on brake squeal coalescence patterns – application on a finite element model

Fritz

Sinou

Duffal

et al. 2007

Mechanics Research Communications

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Brake squeal is referred to, in most publications, as a flutter instability trigged by a mode coupling phenomenon. A lot of clues tends to prove that damping would be a key parameter in brake squeal modelling. This study aims at investigating the effects of damping on coalescence patterns, that is to say on the way the modes couple. A finite element model of the whole brake corner has been used to compute the brake modal behaviour. Then a complex eigenvalue analysis has been undertaken to assess the brake stability as a function of the friction coefficient. Different kinds of damping spreading over the modes have been studied. Two main effects have been noticed: a shifting effect and a smoothing effect. The first one always stabilize the brake, whereas this is not the case of the second one. The combination of the two effects may make the brake more unstable depending on the spreading of the additionnal damping.

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Modeling of automotive drum brakes for squeal and parameter sensitivity analysis

Cited by 83 publications

References 7 publications

Investigation of the relationship between damping and mode-coupling patterns in case of brake squeal

Investigation of the relationship between damping and mode-coupling patterns in case of brake squeal

Overview of disc brakes and related phenomena - a review

Effects of damping on brake squeal coalescence patterns – application on a finite element model

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