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Assessment of disc brake vibration in rail vehicle operation on the basis of brake stand
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Poznan University of Technology, Institute of Transport, ul. Piotrowo 3, 60-965 Poznan, Poland
DB Systemtechnik GmbH, Adlergestell 143, 12439 Berlin, Germany
Publication date: 2021-06-30
Eksploatacja i Niezawodność – Maintenance and Reliability 2021;23(2):221-230
  • In the operation of a disc brake, the geometry of the system changes with the wear of the pads.
  • The lever system is characterized by an uneven distribution of masses on the right and left side of the disc.
  • There is a difference in the vibroacoustic signals of the right and left brake pads.
  • The heavier side of the system shows greater friction in the joints and a reduction in pad vibration.
  • The non-uniform vibrations of the friction pads indicate a disturbance in the braking process.
The scientific aim of the article is to present the relationship between the vibroacoustic signals of the right and left friction pad during braking, depending on the mass distribution, as an element of the lever system. This article presents the results of tests of a railway disc brake in the scope of vibrations generated by pads in various states of wear located on both sides of the brake disc. The tests were carried out on the brake stand using the vibroacoustic method including the analysis of amplitudes and frequencies and the thermal imaging method. Special attention was paid to the analysis of the classic lever mechanism as a multimass system influencing the thermo-mechanical characteristics and vibrations of the pads on the right and left side of the brake disc. Uneven mass distribution of the system translates into uneven wear of the friction components. The scientific aim of this paper is to present the relation between vibroacoustic signals of the right and left friction pad during braking depending on the mass distribution of the lever system component.
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