Brake squeal as dynamic instability: An experimental investigation

Massi, Francesco; Giannini, Oliviero; Baillet, Laurent

doi:10.1121/1.2228745

Cited by 72 publications

(71 citation statements)

References 10 publications

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“…The unstable modes of the perturbed system will have the frequencies close to that of the double eigenvalues at the nodes. This picture qualitatively agrees with the existing experimental data [12,19,23,34,39,40,41].…”

Section: Introductionsupporting

confidence: 82%

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How to Play a Disc Brake: A Dissipation-Induced Squeal

Kirillov¹

2008

SAE Int. J. Passeng. Cars – Mech. Syst.

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The eigenvalues of an elastic body of revolution, rotating about its axis of symmetry, form a 'spectral mesh'. The nodes of the mesh in the plane 'frequency' versus 'gyroscopic parameter' correspond to the double eigenfrequencies. With the use of the perturbation theory of multiple eigenvalues, deformation of the spectral mesh caused by dissipative and nonconservative perturbations, originating from the frictional contact, is analytically described. The key role of indefinite damping and non-conservative positional forces in the development of the subcritical flutter instability is clarified. A clear mathematical description is given for the mechanism of excitation of particular modes of rotating structures in frictional contact, such as squealing disc brakes and singing wine glasses.

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Section: Introductionsupporting

confidence: 82%

“…Similar phenomenon is observed for the squealing disc brake [19,23,34,39,40,41]. For this reason, we formulate the main problem of acoustics of friction of rotating elastic bodies of revolution as the description of the mechanism of activating a particular mode of the continuum by its contact with an external body.…”

Section: Introductionmentioning

confidence: 91%

How to Play a Disc Brake: A Dissipation-Induced Squeal

Kirillov¹

2008

SAE Int. J. Passeng. Cars – Mech. Syst.

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“…A brake system features several kinds of damping, such as structural damping, friction-induced damping and the damping effect of insulators. The effects of damping were first investigated on analytical and experimental analyses [15][16][17][18][19][20][21]. Nevertheless, taking damping into account in a whole brake FE model is far more complicated.…”

Section: Introductionmentioning

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

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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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“…the whole-joint is represented by a single dynamical equation [15], and a minimal model prone to friction induced oscillation. We assume that the time-scales of processes in the frictional interface can be separated from the time-scales of the structural dynamics, as it is usually done in studies focusing on flutter type instabilities [32,33,34,35]. Following up earlier work [19,20,21], we focus on the role that joint characteristics have on limit cycle amplitudes and bifurcation structures.…”

Section: Introductionmentioning

confidence: 99%