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Artículos de revistas sobre el tema "Brake squeal instability"

Autor: Grafiati

Publicado: 1 de junio de 2024

Última modificación: 31 de julio de 2025

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1

Nakai, M., and M. Yokoi. "Band Brake Squeal." Journal of Vibration and Acoustics 118, no. 2 (1996): 190–97. http://dx.doi.org/10.1115/1.2889648.

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The purpose of this paper is to investigate the squealing mechanism of band brakes in order to develop effective treatments for the reduction or elimination of squeal noise. With increasing rotational drum speed, squeal frequency increases up to a constant frequency. This constant squeal frequency coincides precisely with the frequency of instability obtained by a linear analysis of the motion of a band on an elastic foundation when the frictional force between the lining of the band and the drum is taken into account. Through experiments and analyses, it will be demonstrated that squeals are

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2

Nishiwaki, M. "Generalized Theory of Brake Noise." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 207, no. 3 (1993): 195–202. http://dx.doi.org/10.1243/pime_proc_1993_207_180_02.

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Eliminating brake noises generated during brake application is an important issue in the improvement of comfort in vehicles. Brake noises (frequency 1–15 kHz) are often called brake squeal. On the other hand, brake noises (frequency 200–500 Hz) are often called brake groan noise. The studies on drum brake squeal, disc brake squeal and disc brake groan noise have already been presented in references (2), (3) and (4), where theoretical analyses on these brake noises were described. This paper shows that the equations of motion are represented by the same type of equations. Based on these analyse

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3

Lü, Hui, Wen-Bin Shangguan, and Dejie Yu. "A universal approach to squeal analysis of the disc brakes involving various types of uncertainty." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 232, no. 6 (2017): 812–27. http://dx.doi.org/10.1177/0954407017709644.

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On the basis of fuzzy random variables, a universal approach to squeal analysis of the disc brakes involving various types of uncertainty is proposed in this paper. In the proposed approach, first, the brake stability analysis function related to reliability is constructed with fuzzy random variables. Next, the fuzziness represented by fuzzy random variables is decomposed into interval uncertainties by using a level-cut strategy. Then, the expectations and the variances of the brake stability analysis function are approximately solved by the random moment method at different cut levels, and th

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4

Huynh, Le Hong Thai, Aleš Dittrich, and Ondřej Dráb. "Model Predict Vibration and Noise of Disc Brake." Applied Mechanics and Materials 232 (November 2012): 461–64. http://dx.doi.org/10.4028/www.scientific.net/amm.232.461.

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The problem brake squeal is one of the important areas of application in the automotive industry. Most brake squeal is produced by vibration (resonance instability) of the brake components, especially the pads and discs are known as force-coupled excitation. Until now have many research about predict vibration and noise of disc brake but unfortunate the results is not satisfied. This paper presents model for prediction stability of disc brake for a model four degrees of freedom. The result shows stability of system and when occurrence brake squeal.

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5

Zhang, Z., S. Oberst, and JCS Lai. "Instability analysis of friction oscillators with uncertainty in the friction law distribution." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 6 (2015): 948–58. http://dx.doi.org/10.1177/0954406215616421.

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Despite substantial research efforts in the past two decades, the prediction of brake squeal propensity, as a significant noise, vibration and harshness (NVH) issue to automotive manufactures, is as difficult as ever. This is due to the complexity of the interacting mechanisms (e.g. stick-slip, sprag-slip, mode coupling and hammering effect) and the uncertain operating conditions (temperature, pressure). In particular, two major aspects in brake squeal have attracted significant attention recently: nonlinearity and uncertainty. The fugitiveness of brake squeal could be attributed to a number o

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6

Kim, Sungyuk, Seongjoo Lee, Shinwook Kim, and Jaehyeon Nam. "Influence of Brake Pad Temperature Variation on the Squeal Noise Characteristics of Disc’s In-Plane Vibration Mode." Sensors 25, no. 13 (2025): 4080. https://doi.org/10.3390/s25134080.

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This study investigated the squeal noise characteristics of the in-plane mode of the disc in a disc brake system as influenced by the temperature of the brake pad. The temperature range of the brake pad was set between 50 °C and 300 °C, and the squeal noise was analyzed by calculating the complex eigenvalues using the finite element method (FEM). The FEM analysis indicated that instability was most sensitive near 80 °C, and it was observed that instability exhibited mode exchange from the disc’s in-plane mode to the out-of-plane mode in a nearby frequency band due to thermal deformation of the

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7

Ghorbel, Ahmed, Becem Zghal, Moez Abdennadher, Lassâad Walha, and Mohamed Haddar. "Investigation of friction-induced vibration in a disk brake model, including mode-coupling and gyroscopic mechanisms." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 2-3 (2019): 887–96. http://dx.doi.org/10.1177/0954407019845723.

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The brake squeal reduction has been extensively investigated in many academic and industrial researchers. Friction-induced vibrations can be considered as a dynamic instability problem. Generally, automotive engineers and researchers working in the domain of disk brake noise treat instabilities due to the force of friction as a friction-induced vibration. In the case of squeal noise, mode coupling may cause instability of the system. The aim of this article is to propose a minimal two degree of freedom disk brake model in order to investigate the effects of different parameters on mode-couplin

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8

Ouyang, H., and J. E. Mottershead. "A Bounded Region of Disc-Brake Vibration Instability." Journal of Vibration and Acoustics 123, no. 4 (2001): 543–45. http://dx.doi.org/10.1115/1.1394200.

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This paper introduces the velocity-dependent friction law with the Stribeck effect in a moving load model for the vibration and squeal of a car disc brake. Simulated numerical results produce a bounded region of instability for the rotating speed of the disc which is compatible with observed squeal phenomenon.

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9

Tang, B., JL Mo, X. Zhang, Q. Zhang, MH Zhu, and ZR Zhou. "Experimental investigation of the squeal characteristics in railway disc brakes." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 232, no. 11 (2018): 1437–49. http://dx.doi.org/10.1177/1350650117754002.

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In this study, a bespoke small-scale brake dynamometer was developed to simulate the braking conditions of a railway disc brake system. Braking squeal experiments were performed with this brake dynamometer at different braking pressures and disc rotation speeds, and the influence of these braking parameters on the generation and characterization of the squeal noise was evaluated and discussed. The obtained results show that both the braking pressure and the disc rotation speed have a significant influence on the generation and evolution of the squeal noise. Higher rotation speeds are found to

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10

Pan, Gongyu, and Lei Chen. "Impact Analysis of Brake Pad Backplate Structure and Friction Lining Material on Disc-Brake Noise." Advances in Materials Science and Engineering 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/7093978.

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This study proposes a three-layer brake pad design, on which a six-DOF dynamic model of brake disc-brake pad is established, and the factors affecting the system instability are analyzed. The analysis shows that the change of mass and stiffness of the brake pad will affect the stability of the system. From the linear complex eigenvalue analysis, the unstable vibration modes of the brake system are predicted, and the effectiveness of the complex mode analysis model is verified by the brake system bench test. Brake pads with different structural shapes are designed, and their influence on the st

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11

Lai, Van-Vuong, Igor Paszkiewicz, Jean-François Brunel, and Philippe Dufrénoy. "Multi-Scale Contact Localization and Dynamic Instability Related to Brake Squeal." Lubricants 8, no. 4 (2020): 43. http://dx.doi.org/10.3390/lubricants8040043.

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Friction-induced vibrations (brake squeal) produced during braking applications have been one of the major problems in the transportation for many years. It can be the most troublesome for passengers because of its high frequency and acoustic pressure. The role of frictional contact surface geometry on the occurrence of squeal was investigated recently by some researchers. However, it has never been systematically studied at different scales simultaneously. Contact localizations are induced on the one hand by macro effects such as thermal dilatation (macroscopic scale) and on the other hand, b

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12

Huang, Jinchun, Charles M. Krousgrill, and Anil K. Bajaj. "An Efficient Approach to Estimate Critical Value of Friction Coefficient in Brake Squeal Analysis." Journal of Applied Mechanics 74, no. 3 (2006): 534–41. http://dx.doi.org/10.1115/1.2423037.

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Automotive brake squeal generated during brake applications has become a major concern in automotive industry. Warranty costs for brake noise related complaints have been greatly increasing in recent years. Brake noise and vibration control are also important for the improvement of vehicle quietness and passenger comfort. In this work, the mode coupling instability mechanism is discussed and a method to estimate the critical value of friction coefficient identifying the onset of brake squeal is presented. This is achieved through a sequence of steps. In the first step, a modal expansion method

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13

Massi, Francesco, Oliviero Giannini, and Laurent Baillet. "Brake squeal as dynamic instability: An experimental investigation." Journal of the Acoustical Society of America 120, no. 3 (2006): 1388–98. http://dx.doi.org/10.1121/1.2228745.

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14

Soh, H. J., and J.-H. Yoo. "Optimal shape design of a brake calliper for squeal noise reduction considering system instability." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 224, no. 7 (2010): 909–25. http://dx.doi.org/10.1243/09544070jauto1385.

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Squeal is a noise phenomenon occurring in the last stage of automobile braking with a high-frequency sound. It is very difficult to express the phenomenon using a mathematical model, since the origin of squeal noise is physically complex. However, the possibility of squeal generation can be predicted by solving the vibration equation of the self-excited system using the complex eigenvalue analysis method. The results of the method are expressed as the magnitude of the unstable mode, and the generation of squeal noise can be prevented by reducing the magnitude of the unstable mode of the brake

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15

Úradníček, Juraj, Miloš Musil, L’uboš Gašparovič, and Michal Bachratý. "Influence of Material-Dependent Damping on Brake Squeal in a Specific Disc Brake System." Applied Sciences 11, no. 6 (2021): 2625. http://dx.doi.org/10.3390/app11062625.

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The connection of two phenomena, nonconservative friction forces and dissipation-induced instability, can lead to many interesting engineering problems. We study the general material-dependent damping influence on the dynamic instability of disc brake systems leading to brake squeal. The effect of general damping is demonstrated on minimal and complex models of a disc brake. Experimental analyses through the frequency response function (FRF) show different damping of the brake system coalescent modes, indicating possible dissipation-induced instability. A complex system including material-depe

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16

Yavuz, Akif, and Osman Taha Sen. "DISC BRAKE SQUEAL ANALYSIS USING NONLINEAR MATHEMATICAL MODEL." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 2 (2021): 4773–78. http://dx.doi.org/10.3397/in-2021-2834.

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Many academics have examined the disc brake squeal problem with experimental, analytical, and computational techniques, but there is as yet no method to completely understand disc brake squeal. This problem is not fully understood because a nonlinear problem. A mathematical model was created to understand the relationship between brake disc and pad thought to cause the squeal phenomenon. For this study, two degree of freedom model is adopted where the disc and the pad are modeled. The model represents pad and disc as single degree of freedom systems that are connected together through a slidin

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17

Meehan, Paul A. "Prediction and suppression of chaotic instability in brake squeal." Nonlinear Dynamics 107, no. 1 (2021): 205–25. http://dx.doi.org/10.1007/s11071-021-06992-1.

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18

Jacquemond, Achille, Sébastien Besset, Shigeru Obayashi, Koji Shimoyama, and Frédéric Gillot. "Case study: Disc-brake squeal noise reduction through material selection and robust shape optimization." Noise Control Engineering Journal 73, no. 2 (2025): 199–213. https://doi.org/10.3397/1/377313.

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This work aims at numerically quantifying and minimizing disc-brake squeal noise occurrences, using a two-step process involving a material parameter study and shape optimization under uncertainties. Special attention is given to the minimization of computational cost. A simplified disc-brake model is constructed using the novel Isogeometric Analysis method which yields an original shape description well-suited to shape optimization. The prediction of squeal noise propensity is based on the fact that squeal noise is directly related to dynamical instability. A parametric study is carried out t

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19

Zhang, Lijun, Wenbo Li, and Dejian Meng. "Influence of Heterogeneous Contact Stiffness and Heterogeneous Friction Coefficient on Frictional Squeal." Shock and Vibration 2018 (2018): 1–21. http://dx.doi.org/10.1155/2018/6379201.

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Contact stiffness and friction coefficient are excitation sources and key influencing factors to frictional squeal with obvious inhomogeneous characteristic that is always neglected. In this paper, a multipoint contact flexible pin-on-disc system is established considering tangential stiffness. Then influence of contact stiffness and friction coefficient with heterogeneous distribution on frictional squeal is studied using the complex modal analysis. The research shows that contact stiffness and friction coefficient heterogeneities influence the likelihood of occurrence of the squeal, the freq

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20

Kang, Jaeyoung. "Squeal propensity due to rigid modes of brake pad." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 12 (2013): 2100–2109. http://dx.doi.org/10.1177/0954406213515200.

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This paper examines the squeal propensity associated with the rigid motion of a brake pad. For the description of the rigid motion, the brake pad is analytically modeled as a composite annular sector plate with both the back plate and friction material rigid. The friction material is subject to friction contact with a rotating disc. The vibration modes of the rigid pad consist of the six rigid modes including three rotation and three translation modes coupled with contact stiffness. The analytical formulation for the dynamic motion of the composite rigid pad is presented. From the numerical ca

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21

Khafaji, Salwan Obaid Waheed, and Noah Manring. "Sensitivity analysis and Taguchi optimization procedure for a single-shoe drum brake." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 10 (2019): 3690–98. http://dx.doi.org/10.1177/0954406218823799.

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Drum brakes have dominated the braking industry for many years and will most likely continue to do so for the foreseeable future due to their low cost and adequate operating performance. Basic equations for conventional brake are presented, while complicated analysis has been published using finite element methods to predict brake squeal and instability. This paper seeks to step away from the complexity of numerical models to consider the fundamental braking phenomenon of a single-shoe drum brake, using nondimensional, closed-form analysis and a Taylor series expansion to examine the effects o

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22

MALACRIDA ALVES, Guilherme, Etienne BALMES, and Guillaume MARTIN. "Analysis of a brake squeal functional model using a linear parameter varying perspective." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 270, no. 11 (2024): 473–84. http://dx.doi.org/10.3397/in_2024_2355.

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Brake squeal is a limit cycle vibration induced by mode coupling instability that depends on operating conditions such as applied pressure, temperature, and disc velocity. This work proposes a simplified functional model of brake squeal that reproduces the main characteristics observed in a full-scale industrial test campaign: vibration growth, limit cycle saturation, vibration decay and parametric dependence. The proposed functional model differs from the well-known Hoffmann model by the introduction of a nonlinear contact law and a quasi-static pressure loading. First, using a harmonic balan

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23

Lee, Junghwan, and Seonghwan Kim. "A Study on the Squeal Noise Instability Analysis on Caliper Brake." Transactions of the Korean Society for Noise and Vibration Engineering 23, no. 11 (2013): 957–65. http://dx.doi.org/10.5050/ksnve.2013.23.11.957.

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24

Hetzler, Hartmut, and Wolfgang Seemann. "Friction induced flutter instability - on modeling and simulation of brake-squeal -." PAMM 8, no. 1 (2008): 10369–70. http://dx.doi.org/10.1002/pamm.200810369.

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25

Lü, Hui, Qianlang Feng, Zicheng Cai, and Wen-Bin Shangguan. "An optimization method for brake instability reduction with fuzzy-boundary interval variables." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 12 (2018): 3209–21. http://dx.doi.org/10.1177/0954407018820192.

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In some special engineering circumstances, it is likely that all parameters of an uncertain automotive structure can only be treated as interval variables due to limited knowledge, but meanwhile their lower and upper bounds can just be modeled as fuzzy variables rather than as deterministic values due to ambiguous information. To handle this dual uncertainties case, a reliability-based optimization method with fuzzy-boundary interval variables is developed in this study, and it is further extended to carry out squeal instability analysis and reduction of brake involving both limited and vague

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26

Zhou, Kewei, Cheol Kim, and Seoyeon Ahn. "CM-KR-5 Efficient Numerical Method to Predict Brake Squeal Noise Using the Dynamic Instability Technique." Proceedings of Mechanical Engineering Congress, Japan 2012 (2012): _CM—KR—5–1—_CM—KR—5–2. http://dx.doi.org/10.1299/jsmemecj.2012._cm-kr-5-1.

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27

Afferrante, L., M. Ciavarella, and J. R. Barber. "Sliding thermoelastodynamic instability." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 462, no. 2071 (2006): 2161–76. http://dx.doi.org/10.1098/rspa.2006.1676.

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Numerous mechanisms can give rise to instabilities and vibrations in sliding systems. These can generally be characterized as either elastodynamic (e.g. ‘brake squeal’) or thermoelastic. The time-scales of these processes differ considerably, so it is usual to neglect coupling between them, i.e. to neglect thermal effects in elastodynamic analyses and to use the quasi-static approximation in thermoelastic analyses. In the present paper, we consider the potential coupling between them in the simplest possible context—a thermoelastodynamic layer sliding against a rigid plane and constrained to o

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28

Lü, Hui, Kun Yang, Wen-bin Shangguan, Hui Yin, and DJ Yu. "Rendering optimal design under various uncertainties." Engineering Computations 37, no. 1 (2019): 345–67. http://dx.doi.org/10.1108/ec-03-2019-0100.

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Purpose The purpose of this paper is to propose a unified optimization design method and apply it to handle the brake squeal instability involving various uncertainties in a unified framework. Design/methodology/approach Fuzzy random variables are taken as equivalent variables of conventional uncertain variables, and a unified response analysis method is first derived based on level-cut technique, Taylor expansion and central difference scheme. Next, a unified reliability analysis method is developed by integrating the unified response analysis and fuzzy possibility theory. Finally, based on t

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29

Yoon, Jungro, Joosang Park, and Seungjae Min. "Optimal disc brake design for reducing squeal instability using slip-dependent complex eigenvalue analysis." Mechanical Systems and Signal Processing 177 (September 2022): 109240. http://dx.doi.org/10.1016/j.ymssp.2022.109240.

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30

INOUE, Hayuru, and Takayoshi KAMADA. "Structural instability of friction-induced vibration by characteristic polynomial plane applied to brake squeal." Journal of Advanced Mechanical Design, Systems, and Manufacturing 14, no. 1 (2020): JAMDSM0014. http://dx.doi.org/10.1299/jamdsm.2020jamdsm0014.

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31

VanderLugt, David N., Charles M. Krousgrill, and Farshid Sadeghi. "Experimental observations of coupled-mode instability in disc brake systems leading to squeal vibration." International Journal of Vehicle Noise and Vibration 2, no. 3 (2006): 266. http://dx.doi.org/10.1504/ijvnv.2006.011970.

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32

Cho, Sangwoon, and Byoungduk Lim. "An Experimental Study on the Squeal Noise Generation due to Dynamic Instability of Brake Pad." Transactions of the Korean Society of Automotive Engineers 24, no. 5 (2016): 520–26. http://dx.doi.org/10.7467/ksae.2016.24.5.520.

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33

Ostermeyer, Georg-Peter, Michael Müller, Stephan Brumme, and Tarin Srisupattarawanit. "Stability Analysis with an NVH Minimal Model for Brakes under Consideration of Polymorphic Uncertainty of Friction." Vibration 2, no. 1 (2019): 135–56. http://dx.doi.org/10.3390/vibration2010009.

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In brake systems, some dynamic phenomena can worsen the performance (e.g., fading, hot banding), but a major part of the research concerns phenomena which reduce driving comfort (e.g., squeal, judder, or creep groan). These dynamic phenomena are caused by specific instabilities that lead to self-excited oscillations. In practice, these instabilities can be investigated using the Complex Eigenvalues Analysis (CEA), in which positive real parts of the eigenvalues are identified to characterize instable regions. Measurements on real brake test benches or tribometers show that the coefficient of f

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34

Kang, Jaeyoung, Charles M. Krousgrill, and Farshid Sadeghi. "Dynamic instability of a thin circular plate with friction interface and its application to disc brake squeal." Journal of Sound and Vibration 316, no. 1-5 (2008): 164–79. http://dx.doi.org/10.1016/j.jsv.2008.02.041.

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35

Soobbarayen, K., J. J. Sinou, and S. Besset. "Numerical study of friction-induced instability and acoustic radiation – Effect of ramp loading on the squeal propensity for a simplified brake model." Journal of Sound and Vibration 333, no. 21 (2014): 5475–93. http://dx.doi.org/10.1016/j.jsv.2014.05.037.

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36

Lü, Hui, Wen-Bin Shangguan, and Dejie Yu. "A unified approach for squeal instability analysis of disc brakes with two types of random-fuzzy uncertainties." Mechanical Systems and Signal Processing 93 (September 2017): 281–98. http://dx.doi.org/10.1016/j.ymssp.2017.02.012.

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37

Liu, Shaona, Longting Li, Hongming Lv, Xiangwen Hu, Yunping Li, and Yuansheng Chen. "Structure analysis and optimization of brake pad for disk brake squeal suppression." AIP Advances 15, no. 3 (2025). https://doi.org/10.1063/5.0255750.

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The brake squeal during automobile braking seriously affects the comfortableness and quality of automobile products. To analyze the effect factor on brake squeal, disk brake squeal experiments and simulation were carried out with a disk brake test bench and finite element method. It is found that the grooving and chamfering on the brake pad friction surface have a great influence on the brake squeal. The number of unstable modes and the tendency of instability of the pad with a single groove on the pad friction surface are lower than that with a double groove. The orthogonal tests are designed

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38

Maciel, Mateus Holanda Cardoso, Rômulo do Nascimento Rodrigues, Camilo Augusto Santos Costa, Roberto De Araujo Bezerra, Vanessa Vieira Gonçalves, and Thiago Victor Albuquerque de Freitas. "Parametric analysis on temperature influence on brake squeal generation in a single-seater off-road vehicle’s disc brake." Noise & Vibration Worldwide, September 20, 2023. http://dx.doi.org/10.1177/09574565231203250.

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Brakes are a critical component of automobiles, responsible for converting kinetic energy into heat and vibration. The phenomenon of brake squeal, which produces uncomfortable noises, has been extensively studied in both drum and disc brakes. Many studies have evaluated the influence of material and operational parameters on brake instability to reduce squeal. However, the effect of temperature, a key factor in brake performance, is often overlooked. This study aims to fill this gap by analyzing a single rear-axle disc brake from an off-road single-seater vehicle using a parametric approach. T

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39

Pan, Gongyu, Xiaoman Zhang, Peng Liu, and Lin Chen. "Impact analysis of contact symmetrical caliper structure on brake squeal." Journal of Vibration and Control, September 10, 2020, 107754632095951. http://dx.doi.org/10.1177/1077546320959517.

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The brake squeal of automobiles has become one of the most annoying issues for passengers. Hence, it is essential to suppress the noise from the design stage of the braking system. In this article, the method for reducing squeal noise is explored based on the finite element model of the brake system. Studies on this model show that the structural deficiency of the brake caliper may cause the instability of the braking system and then cause squeal noise. Thus, the brake caliper is optimized to achieve a symmetrical contact pressure distribution on the inner and outer sides of the disc surface.

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40

Patil, Yatesh, Subim Khan, Shoaib Iqbal, Amol Bankar, and Maheshwari Patil. "Brake Squeal Analysis using Finite Element Analysis Method." International Journal of Engineering Sciences 13, no. 3 (2020). http://dx.doi.org/10.36224/ijes.130301.

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The Finite Element Analysis (FEA) is widely used for solving many Engineering problems. This paper focuses on use of FEA for Brake Squeal Analysis. Automobiles generates several kinds of noises like Groan, chatter, judder, moan, and squeal. Brake squeal can be defined as an unwanted noise that occurs due to dynamic instability of the system. It generally occurs in the frequency range of 1 KHz to 16 KHz.The aim of the project is to predict the squeal noise occurring at particular frequencies at an early stage of development using full corner brake model. The preprocessing of the full corner bra

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41

Maciel, Mateus Holanda Cardoso, Romulo do Nascimento Rodrigues, Camilo Augusto Santos Costa, Roberto de Araujo Bezerra, Vanessa Vieira Gonçalves, and Thiago Victor Albuquerque de Freitas. "Brake squeal finite element performance comparison between commercial and coconut shell-reinforced material drum brake linings." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, April 18, 2024. http://dx.doi.org/10.1177/14644207241247741.

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Brakes play a vital role in vehicles, converting kinetic energy into heat and vibration. Brake squeal, an uncomfortable noise phenomenon, has been thoroughly researched in both drum and disc brakes. Many studies have explored how factors such as material, temperature, and operations impact brake instability and noise. Yet, commercial drum brake linings often contain hazardous asbestos. This poses health risks, exposing individuals to harmful airborne particles, particularly affecting lung health. Hence, current research aims to develop asbestos-free alternative linings, prioritizing reduced we

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42

Wulff, Paul, Nils Gräbner, and Utz von Wagner. "Minimal model identification of drum brake squeal via SINDy." Archive of Applied Mechanics, July 22, 2024. http://dx.doi.org/10.1007/s00419-024-02659-6.

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AbstractThe industrial standard in the design and development process of NVH(Noise Vibration Harshness) characteristic of brakes is the application of Finite Element(FE) models with a high number of degrees of freedom in the range of one or several millions. Nevertheless, parallel experimental investigations are still indispensable. On the other hand, minimal models with, due to the inclusion of the self-excitation process, at least two degrees of freedom are well known to be capable to explain qualitatively phenomena as instability of the desired non-vibrating solution or limit cycle oscillat

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43

Balmes, Etienne, Guillaume Martin, and Guillaume Vermot des Roches. "Squeal occurrence classification using a harmonic balance vector signal model." Journal of Structural Dynamics, 2025. https://doi.org/10.25518/2684-6500.260.

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Brake squeal is an instability that generates self-excited limit cycles which vary with time and operating conditions in real experiments. To analyze test results, it is proposed to use a Harmonic Balance Vector (HBV) signal model. It combines Harmonic Balance Method and analytic signal methodologies. From the Harmonic Balance Method, one uses the space-time decomposition where spatial distribution of each harmonic is described by a complex vector and frequency is common to all sensors. From analytic signal, one keeps the assumption that quantities are slowly varying in time. Synchronous demod

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44

Rodrigues, Rômulo do Nascimento, Gabriela Achtenová, Vanessa Vieira Gonçalves, and Roberto de Araújo Bezerra. "A complex eigenvalue approach to brake squeal performance: Comparing commercial and Coconut shell-reinforced friction materials in vented railway brake discs." Noise & Vibration Worldwide, June 12, 2025. https://doi.org/10.1177/09574565251348866.

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Natural fibers, like coconut shells, offer an eco-friendly and renewable alternative for brake pads, providing promising performance in terms of friction and durability. Research has shown that these reinforced materials can perform comparably to commercial options, particularly in areas such as wear resistance and mechanical stability. While many studies have focused on chemical and mechanical properties, there is still limited understanding of their impact on noise phenomena in braking systems. Further exploration is needed to evaluate their potential in reducing noise. Train noise pollution

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45

Hagedorn, Peter, Manuel Eckstein, Eduard Heffel, and Andreas Wagner. "Self-Excited Vibrations and Damping in Circulatory Systems." Journal of Applied Mechanics 81, no. 10 (2014). http://dx.doi.org/10.1115/1.4028240.

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Self-excited vibrations in mechanical engineering systems are in general unwanted and sometimes dangerous. There are many systems exhibiting self-excited vibrations which up to this day cannot be completely avoided, such as brake squeal, the galloping vibrations of overhead transmission lines, the ground resonance in helicopters and others. These systems have in common that in the linearized equations of motion the self-excitation terms are given by nonconservative, circulatory forces. It has been well known for some time, that such systems are very sensitive to damping. Recently, several new

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