Effectiveness of multilayer viscoelastic insulators to prevent occurrences of brake squeal: A numerical study

Festjens, Hugo; Chevallier, Gaël; Renaud, François; Dion, Jean-Luc; Remy, Lemaire

doi:10.1016/j.apacoust.2012.03.017

Cited by 27 publications

(19 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to predict the occurrence of self-excited vibrations, a classical stability analysis can be performed. Complex eigenvalues and complex modes will be used to estimate the squeal propensity of the brake in a given frequency range [3,24]. This approach can be divided into two parts.…”

Section: Stability Analysis Of the Tgv Brake Systemmentioning

confidence: 99%

A global strategy based on experiments and simulations for squeal prediction on industrial railway brakes

Sinou

Loyer

Chiello

et al. 2013

Journal of Sound and Vibration

View full text Add to dashboard Cite

This paper presents an overview of recent experimental and numerical investigations on industrial railway brakes. The goal of the present study is to discuss the relevance of the mechanical modeling strategy for squeal prediction. Specific experimental set-ups based on transient and controlled braking tests are designed for this purpose. Measurements are performed on it to investigate the dynamic behavior of TGV squeal noise and its squeal characterization through experiments. It will be demonstrated that it is possible to build consistent and efficient finite element models to simulate squeal events in TGV brake systems. The numerical strategy will be presented, including not only the modeling of the TGV brake system and the stability analysis, but also the transient nonlinear dynamic and computational process based on efficient reduced basis. This complete numerical strategy allows us to perform relevance squeal prediction on industrial railway brakes. This study comes within the scope of a research program AcouFren that is supported by ADEME (Agence De l'Environnement et de la Maîtrise de l'Energie) concerning the reduction of the squeal noise generated by high power railway disc brakes

show abstract

Section: Stability Analysis Of the Tgv Brake Systemmentioning

confidence: 99%

A global strategy based on experiments and simulations for squeal prediction on industrial railway brakes

Sinou

Loyer

Chiello

et al. 2013

Journal of Sound and Vibration

View full text Add to dashboard Cite

show abstract

“…The storage modulus E and the loss factor tan(δ) estimated based on HFV according for several temperatures and as a function of frequency, are presented in Figure 7. The estimated storage modulus varies between 2.8 MPa and 1540 MPa, and the loss factor between 0 and 2.1 for the temperatures spanning the range of [20-80°C] Uncertainties could arise from the preload because the mechanical properties of some polymeric materials vary with the preload [40]. This aspect remains to be explored in the case of tBA/PEGDMA.…”

Section: High-frequency Visco-analysis Resultsmentioning

confidence: 99%

Identification of the viscoelastic properties of the tBA/PEGDMA polymer from multi-loading modes conducted over a wide frequency–temperature scale range

et al. 2018

View full text Add to dashboard Cite

The viscoelastic properties of tBA/PEGDMA, which is a Shape Memory Polymer (SMP), were characterized over wide bands of frequency and temperature. The continuity of the viscoelastic properties identified according to the frequency, the temperature, the loading mode and the test scale was assessed. Seven experimental methods were used, from quasi-static to high frequencies, in tensile, shear and compression, from the nanoscopic scale to the macroscopic scale. The storage modulus and the loss factor of the SMP were evaluated and compared from one method to the other. The comparison between the various tests was done based on measurements obtained with a Dynamic Mechanical Analysis and extrapolated through the Time-Temperature Superposition principle. All the data gathers on a unique master curve. For the various experimental methods, it appears that all the viscoelastic properties are consistent even if different scales and loading modes are involved. This wide band characterization makes it possible to determine the mechanical viscoelastic properties of the tBA/PEGDMA in order to use it in structural applications. The experimental methods used in this paper combine commercial methods and in-house high-tech methods. It should be emphasized that the set of experiments covers effective measurements from 10 −4 to 10 6 Hz, 0 to 90 C, strain levels from 10 −4 % to 5%, at nano, micro and macro scales on the same material.

show abstract

“…According to studies conducted by Festjens, shims are almost uniquely in their normal direction in brake systems. The studies that focus on the added damping and stiffening induced by the viscoelastic materials reveal that certain eigenmodes of the viscoelastic shims can reveal instabilities that would not exist without them [6]. Fulco underlined the importance of the contact stiffness between the baking plate and the piston or caliper on the squeal noise generation and how the shim improves this factor [7].…”

Section: Automotive Brake Squealmentioning

confidence: 99%

Modal Coupling in Presence of Dry Friction

Simone

Guida

2018

Machines

View full text Add to dashboard Cite

Abstract:In this paper, we analyze the behavior of a single pad system in the presence of dry friction. The goal is to investigate the path that leads a stable mechanical system to unstable behavior. In doing so, we studied the behavior of a discrete three DOF model, a continuous model and a finite element model of the pad. The numerical results are consistent with the experimental investigation conducted on a brake disk for railway application.

show abstract

Effectiveness of multilayer viscoelastic insulators to prevent occurrences of brake squeal: A numerical study

Cited by 27 publications

References 19 publications

A global strategy based on experiments and simulations for squeal prediction on industrial railway brakes

A global strategy based on experiments and simulations for squeal prediction on industrial railway brakes

Identification of the viscoelastic properties of the tBA/PEGDMA polymer from multi-loading modes conducted over a wide frequency–temperature scale range

Modal Coupling in Presence of Dry Friction

Contact Info

Product

Resources

About