Transient vibro-acoustic analysis of squeal events based on the experimental bench FIVE@ECL

Lenoir, D.; Besset, Sébastien; Sinou, Jean-Jacques

doi:10.1016/j.apacoust.2020.107286

Cited by 8 publications

(10 citation statements)

References 33 publications

(42 reference statements)

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“…The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by Shanghai Sailing Program (21YF1449000); the National Natural Science Foundation of China (52072270). Then make use of equation (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14), equations (2-11)-(2-13) can be expressed in matrix form as…”

Section: Declaration Of Conflicting Interestsmentioning

confidence: 99%

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A study of the influence of heterogeneous friction coefficient and heterogeneous contact stiffness on the generation of squeal

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Friction and contact characteristics play important roles in brake squeal generation, while their heterogeneous characteristics are often neglected. In this paper, a flexible pin-on-disc system model is established. Squeal bench test is carried out to verify the correctness of the model. Random heterogeneous friction coefficients and contact stiffnesses are built and assigned to the model. Evaluation indexes of friction and contact heterogeneities are established. The unstable region and the squeal uncertainty are analyzed. Then, the influence of the heterogeneous friction and contact characteristics on generation of brake squeal is explored based on statistical method and uncertainty concept in the unstable region and the mix region respectively. The results show that when only friction coefficient is heterogeneous, the radius of the center position of friction coefficient is the key influencing factor of brake squeal; when only contact stiffness is heterogeneous, the radius of the center position of contact stiffness is the key influencing factor of brake squeal; when friction coefficient and contact stiffness are both heterogeneous, the mean value of the product of friction coefficient and contact stiffness and the radius of the center position of friction coefficient play critical roles on friction squeal. Besides, squeal tends to occur when the mean value of the product of heterogeneous friction coefficient and contact stiffness and the radius of the center position of friction coefficient are large.

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Section: Declaration Of Conflicting Interestsmentioning

confidence: 99%

“…6,7 Stender et al 8 observed that brake squeal had multi-scale characteristics. Sinou et al [9][10][11] established a new test bench for friction induced vibration. And the correlation between sound pressure and vibration was analyzed.…”

Section: Introductionmentioning

confidence: 99%

A study of the influence of heterogeneous friction coefficient and heterogeneous contact stiffness on the generation of squeal

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…Indeed, the study of brake squeal is a multi-physics problem that requires advanced analysis in various fields such as vibration, tribology, thermodynamics and acoustics, for example. As a result, academic test rigs [18][19][20][21][22][23][24][25][26][27] have been developed in order to propose experimental contributions in order to better understand friction-induced vibrations and noise.…”

Section: Introductionmentioning

confidence: 99%

Brake Squeal Investigations Based on Acoustic Measurements Performed on the FIVE@ECL Experimental Test Bench

Besset,

Lenoir,

Sinou

2023

Applied Sciences

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Radiated noise is a major topic of interest regarding the brake squeal phenomenon as it is directly linked to the noise generated which can be potentially detrimental to user comfort and perception. However, very few studies offer in-depth and comprehensive insight into the analysis and understanding of acoustic noise during squeal events. This study is intended to provide an original contribution to this issue by investigating acoustic phenomena occurring during the squeal phenomenon via a digital antenna composed of 117 microphones. Experiments are performed on the Friction-Induced Vibration and noisE test bench at Ecole Centrale de Lyon (FIVE@ECL). The first main aim is to investigate the characteristics of the acoustic radiated field during brake squeal and more particularly to describe the evolution of the radiated field patterns per revolution of the disc system. The second major aim is to illustrate the possibility of reconstructing the radiated acoustic field everywhere in the space surrounding the brake system, leading to the construction of a robust representation of 3D acoustic patterns, providing acoustic squeal events in the physical space around the brake system. Results show that the vibratory signature remains identical during squeal event braking test. The acoustic signature of squeal noise consists mainly of a fundamental frequency and its harmonic components, with secondary lower contributions from other fundamental frequencies. The associated radiated acoustic field during squeal events are characterized by different directivities and intensities of the acoustic radiated field for each squeal frequency, with potential changes in these directivities and intensities over short times corresponding to the rotation period of the disc.

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“…joints [8,10,11], dampers and brake systems [12][13][14]. High amplitude FIV is commonly the consequences of friction instabilities that give rise to tedious noise [15][16][17][18] usually classified in squeal, groan or chatter depending on the frequency band in which it occurs [19]. One of the phenomena at the origins of such noises are stick-slip [20].…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental analysis of the bi-stable state for frictional continuous system

et al. 2020

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Unstable friction-induced vibrations are considered an annoying problem in several fields of engineering. Although several theoretical analyses have suggested that friction-excited dynamical systems may experience sub-critical bifurcations, and show multiple coexisting stable solutions, these phenomena need to be proved experimentally and on continuous systems. The present work aims to partially fill this gap. The dynamical response of a continuous system subjected to frictional excitation is investigated. The frictional system is constituted of a 3D printed oscillator, obtained by additive manufacturing that slides against a disc rotating at a prescribed velocity. Both a finite element model and an experimental setup has been developed. It is shown both numerically and experimentally that in a certain range of the imposed sliding velocity the oscillator has two stable states, i.e. steady sliding and stick–slip oscillations. Furthermore, it is possible to jump from one state to the other by introducing an external perturbation. A parametric analysis is also presented, with respect to the main parameters influencing the nonlinear dynamic response, to determine the interval of sliding velocity where the oscillator presents the two stable solutions, i.e. steady sliding and stick–slip limit cycle.

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Transient vibro-acoustic analysis of squeal events based on the experimental bench FIVE@ECL

Cited by 8 publications

References 33 publications

A study of the influence of heterogeneous friction coefficient and heterogeneous contact stiffness on the generation of squeal

A study of the influence of heterogeneous friction coefficient and heterogeneous contact stiffness on the generation of squeal

Brake Squeal Investigations Based on Acoustic Measurements Performed on the FIVE@ECL Experimental Test Bench

Numerical and experimental analysis of the bi-stable state for frictional continuous system

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