Vibration and noise in brake systems of vehicles. Part 2: Theoretical investigation techniques

Sergienko, V. P.; Bukharov, Sergey N.

doi:10.3103/s1068366609030106

Cited by 13 publications

(7 citation statements)

References 37 publications

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“…The frictional vibration noise during automobile braking not only seriously affects the riding experience of drivers and passengers, but also is one of the main noises of the car [1] . At present, the methods of reducing brake vibration and noise can be roughly divided into four types: modi cation of friction pair interface, optimization of the structure of key components of brakes, increasing the damping of brakes (such as pasting silencers on the back plate of brake pads) and changing the material properties of key components of brakes [2][3][4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

Study on Friction and Vibration Characteristics of Brake Disc by Surface Micro-modeling

Li,

Jin,

Sun

et al. 2023

Preprint

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Aiming at the problem of friction, vibration and noise during braking of disc brakes, the surface of the brake disc is micro-shaped with different densities and different angle distributions, and the finite element model of the disc brake is established. The complex eigenvalue analysis method was used to explore the influence of micro-modeling with different density and angle distribution on the friction and vibration characteristics of disc brakes under different working conditions. The results show that with the increase of braking pressure, the vibration instability of disc brakes increases. The speed of the brake disc has no obvious effect on the vibration stability of the brake; Increasing the elastic modulus of the brake disc will significantly reduce the friction vibration noise of the brake and improve the vibration stability of the brake when braking. The vibration stability of brakes with surface micro-modeling is significantly better than that of the original brakes under different pressure and speed conditions and the elastic modulus of the brake disc, and this paper provides a new idea for the structural optimization of brake vibration and noise reduction.

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Section: Introductionmentioning

confidence: 99%

Study on Friction and Vibration Characteristics of Brake Disc by Surface Micro-modeling

Li,

Jin,

Sun

et al. 2023

Preprint

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“…Se han usado sistemas basados en acústica para caracterizar fallas comunes o específicas de elementos indispensables, como las bujías [15]. Así también, se han reportado investigaciones teóricas sobre fenómenos vibroacústicos en sistemas de frenos de transporte [16]. De igual forma se han presentado estudios de vibración forzada de baja frecuencia y ruido en frenos [17].…”

Section: Introductionunclassified

Identificación mediante pruebas no destructivas de los cambios en el espectro de audiofrecuencias en discos de frenos automotrices fracturados

Gómez Morales,

Aparicio Razo,

Muñoz Hernández

2023

mdcyti_somim

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Este trabajo muestra la variación del espectro de audiofrecuencias de 4 discos de freno automotrices con características particulares, como un primer acercamiento a las pruebas de audiofrecuencias para detectar fracturas en discos automotrices. El método usado constó de tres tipos de estudios. Se usó una máquina de pruebas para generar vibración en el disco, empleando un micrófono para captar vibraciones mediante el sonido y otro para captar vibraciones por contacto. Se realizó un primer estudio analizando el espectro de frecuencias, lo que mostró de manera clara la aparición de frecuencias en zonas particulares del espectro, describiendo características específicas del disco, a las que se les llamó frecuencias de falla. El segundo estudio realizado fue el análisis de potencia, que brindó características visuales superiores al primer estudio. Finalmente, se empleó un estudio basado en la distorsión armónica total, arrojando datos muy claros de los discos dañados y más aún, sus gráficas describieron características como grosor, rugosidad y fractura de la pista del disco.

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“…In addition to the disc and the friction pads, the resonance or frictional contact of other parts may also cause a brake squeal [7,8]. According to the theory of modal coupling self-excited vibration, the brake squeal is caused by the improper matching of the structural parameters of various parts during friction [9][10][11]. Based on modal coupling theory, complex modal analysis is widely used to reduce the automobile brake squeal.…”

Section: Introductionmentioning

confidence: 99%

Mechanism Analysis of a Low-Frequency Disc Brake Squeal Based on an Energy Feed-In Method for a Dual Coupling Subsystem

2020

Shock and Vibration

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Brake squeal is a major component of vehicle noise. To explore the mechanism of the low-frequency brake squeal, a finite element model of an automobile disc brake was established, and a complex mode numerical simulation was performed. According to the unstable modes stemming from the complex modal analysis results, the low-frequency range brake squeal can be determined. Based on an energy feed-in method, the coupling subsystems of the piston-caliper and the disc-pad were established, and a calculation formula for the feed-in energy of the dual coupling subsystem was derived. The results showed that when the feed-in energy of the dual coupling subsystem is close to zero, the complex mode cannot be excited at the corresponding frequency. In addition, the difference in feed-in energy between the two coupling subsystems is positively correlated with the probability of the brake squeal, which can be used to determine the complex mode under which the brake squeal may occur. The greater the feed-in energy of a coupling subsystem is, the more likely it is that the maximum brake vibration mode will appear at this subsystem or its adjacent parts. The increase in brake oil pressure will eliminate some lower-frequency sounds but will not change the frequency of the original low-frequency brake squeals.

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Vibration and noise in brake systems of vehicles. Part 2: Theoretical investigation techniques

Cited by 13 publications

References 37 publications

Study on Friction and Vibration Characteristics of Brake Disc by Surface Micro-modeling

Study on Friction and Vibration Characteristics of Brake Disc by Surface Micro-modeling

Identificación mediante pruebas no destructivas de los cambios en el espectro de audiofrecuencias en discos de frenos automotrices fracturados

Mechanism Analysis of a Low-Frequency Disc Brake Squeal Based on an Energy Feed-In Method for a Dual Coupling Subsystem

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