Numerical study of friction-induced instability and acoustic radiation – Effect of ramp loading on the squeal propensity for a simplified brake model

Soobbarayen, Kevin; Sinou, Jean-Jacques; Besset, Sébastien

doi:10.1016/j.jsv.2014.05.037

Cited by 26 publications

(14 citation statements)

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“…While a brake squeal is characterized primarily as an acoustic phenomenon, the prediction of the acoustic response during squeal events has been usually ignored. There have been only few attempts to calculate and analyze the acoustic radiation of brake squeal [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Simulation of Transient Nonlinear Friction-Induced Vibrations Using Complex Interface Modes: Application to the Prediction of Squeal Events

Sinou

Besset

2017

Shock and Vibration

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During the past decades, the problem of friction-induced vibration and noise has been the subject of a huge amount of works. Various numerical simulations with finite elements models have been largely investigated to predict squeal events. Although a nonlinear analysis is more predictive than Complex Eigenvalues Analysis, one of the main drawbacks of the time analysis is the need of large computational efforts. In view of the complexity of the subject, this approach appears still computationally too expensive to be used in industry for finite element models. In this study, the potential of a new reduced model based on a double modal synthesis (i.e., a classical modal reduction via Craig and Bampton plus a condensation at the frictional interface based on complex modes) for the prediction of self-excited vibrations of brake squeal is discussed. The effectiveness of the proposed modal reduction is tested on a finite element model of a simplified brake system. It will be shown that numerical results of times analysis by applying the proposed reduction correlate well with those of the nonlinear analysis based on a reference model, hence demonstrating the potential of using adapted modal reductions to predict the squeal propensity and to estimate self-excited vibrations and noise.

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Section: Introductionmentioning

confidence: 99%

Simulation of Transient Nonlinear Friction-Induced Vibrations Using Complex Interface Modes: Application to the Prediction of Squeal Events

Sinou

Besset

2017

Shock and Vibration

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“…As most systems contain nonlinearity in reality, the research into nonlinear friction-induced vibration has been carried out through experimental, analytical [33] and numerical approaches [34][35][36]. One significant source of nonlinearity in friction-induced vibration is the contact.…”

Section: Introductionmentioning

confidence: 99%

“…Sinou and Jézéquel [16] studied the role of damping in mode coupling instability and the amplitude of limit cycle of a simple nonlinear two-degree-of-freedom model which had a cubic nonlinear contact stiffness in order to avoid bad design. Moreover in [36], both a linear and a cubic contact laws were used in a simplified disc model, which fitted the experimental results of compression force against deformation of the pad material under varying normal pressure.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear Friction-Induced Vibration of a Slider–Belt System

Ouyang

Guan

2016

Journal of Vibration and Acoustics

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A mass–spring–damper slider excited into vibration in a plane by a moving rigid belt through friction is a major paradigm of friction-induced vibration. This paradigm has two aspects that can be improved: (1) the contact stiffness at the slider–belt interface is often assumed to be linear and (2) this contact is usually assumed to be maintained during vibration (even when the vibration becomes unbounded at certain conditions). In this paper, a cubic contact spring is included; loss of contact (separation) at the slider–belt interface is allowed and importantly reattachment of the slider to the belt after separation is also considered. These two features make a more realistic model of friction-induced vibration and are shown to lead to very rich dynamic behavior even though a simple Coulomb friction law is used. Both complex eigenvalue analyses of the linearized system and transient analysis of the full nonlinear system are conducted. Eigenvalue analysis indicates that the nonlinear system can become unstable at increasing levels of the preload and the nonlinear stiffness, even if the corresponding linear part of the system is stable. However, they at a high enough level become stabilizing factors. Transient analysis shows that separation and reattachment could happen. Vibration can grow with the preload and vertical nonlinear stiffness when separation is considered, while this trend is different when separation is ignored. Finally, it is found that the vibration magnitudes of the model with separation are greater than the corresponding model without considering separation in certain conditions. Thus, ignoring the separation is unsafe.

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“…By conducting a forced response study and importing surface velocities from a stationary excited brake system into an acoustic Boundary Element (BE) model, radiation efficiencies for frequencies above 2-3 kHz have been shown to be of the order of unity with the rotor being the most important contributor to the acoustic radiation [29]. However, since not every limit cycle squeals, the acoustic analysis of unstable vibration modes due to pure self-excitation has gained some attention recently [30] showing the complexity of the three-dimensional sound fields [31].…”

Section: Introductionmentioning

confidence: 99%