Reduction of wheel squeal noise in a low speed operating environment

Noise emitted by trains operating in a slow speed operating environment is generated from various contributing factors, including: vehicle motors, impact through switches, track structure movement, rail surface anomalies and rail-wheel contact. All of these factors contribute to noise over a wide range of frequencies. A primary noise of concern to local residents is wheel squeal, which is generally found near the high frequency end of the audible noise spectrum. This paper outlines the positive results achieved from a study conducted by the Institute of Railway Technology on behalf of the MTR Corporation to determine the cause of wheel squeal noise emitted by low speed traffic in a busy rail depot within the Hong Kong metro network. The study found wheel squeal to be directly related to adhesion/friction characteristics that exist in a slow speed, high creepage environment (sharp curves). Lowering the adhesion limit was identified as an efficient way to control creep forces and energy dissipation in order to eliminate squeal noise. Friction modifiers/lubricants can thus be used to stabilize the curving behaviour, eliminate transient conditions and prevent squeal from occurring.

Media Info

  • Pagination: 7p. ; PDF
  • Monograph Title: Rail - the core of integrated transport: CORE 2012: conference on railway engineering, 7-10 September 2012, Perth, Western Australia

Subject/Index Terms

Filing Info

  • Accession Number: 01532167
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Jul 29 2014 11:59AM