Journal of Theoretical and Applied Vibration and Acoustics

Journal of Theoretical and Applied Vibration and Acoustics

Experimental investigation of natural frequency uncertainties in disc brakes in contact with pads

Document Type : H. Ahmadian Prize

Authors
Fahimeh Noohi 1
Amin Nikoobin 2
Mohammad Reza Ashory 3
1 Ph.D. Candidate, School of Mechanical Engineering, Semnan University,Semnan, Iran
2 Assistant Professor, Mechanical Engineering Department, Semnan University, Semnan, Iran
3 Associate Professor, School of Mechanical Engineering, Semnan University, Semnan, Iran
10.22064/tava.2024.2013013.1229
Abstract
The brake system is a critical component of any vehicle, ensuring safety and control while driving. Disc brake stability, understanding and optimizing the contact area between the disc and the pad is crucial for improving braking performance and preventing issues like brake squeal. Several sources of uncertainty in a braking system can make it difficult to completely eliminate problems like squealing. This paper attempts to study the uncertainty of natural frequencies by changing the contact area between the disk and the pads with an experimental investigation. To this end, three stages of testing have been performed. An experimental modal study under free disk conditions has been conducted to identify material properties, followed by a modal examination of a clamped brake system without pads to determine boundary conditions. Then, modal tests have been performed to investigate the response uncertainties by changing the contact surface between the disc and pads. This research approach can provide valuable insights into the factors that influence the performance and noise characteristics of the braking system, particularly in relation to brake squeal.

Highlights

  • Experimental investigation of the natural frequency uncertainties of the car disc brake system
  • Identification the material properties and boundary conditions of the structure and finite element modeling the brake disc.
  • Eliminating the uncertainties in other test conditions and considering the uncertainties related to the change of the disc and pad contact surface
  • Investigating the effect of increasing braking pressure on dynamic responses

Keywords
Brake disc
Uncertainty
Brake squeal
Dynamic analysis
Subjects
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Journal of Theoretical and Applied Vibration and Acoustics
Volume 9, Issue 1 - Serial Number 1
January 2023
Pages 14-28