BRAKE SQUEAL - THE INFLUENCE OF ROTOR GEOMETRY

Brake squeal is currently seen as perhaps the most serious operational braking problem, particularly on passenger cars, but also increasingly on heavy goods vehicles. Although much progress has been made in understanding the fundamental mechanisms of squeal, its application to the design of quiet brake systems and the simplicity of the predictive models which have been developed. The work described here brings together experimental modal analysis measurements of squealing brakes and simple binary flutter stability modelling to develop a potentially generally applicable solution to a range of squeal problems. A novel modal analysis technique is developed for the measurement of rotor modes showing stationary complex meridian modes of a form compatible with a binary flutter mechanism for squeal. The inherent rotational symmetry of most brake rotors is shown to be a pre-requisite for the occurrence of such modes and hence for flutter instability, and the conditions for reducing this symmetry are examined. Finite element modelling is used to examine the practical problems of reducing brake rotor symmetry, and the effect of applying the technique to real brakes is evaluated and found to reduce or eliminate relevant squeal problems. (A) For the covering abstract see IRRD 857625.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0852988532
• Corporate Authors:

  Institution of Mechanical Engineers

  1 Birdcage Walk
  London SW1H 9JJ,   England 
• Authors:
  • LANG, A M
  • NEWCOMB, T P
  • BROOKS, P C
• Conference:
  • PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS. BRAKING OF ROAD VEHICLES. INTERNATIONAL CONFERENCE HELD 23-24 MARCH 1993 AT BIRDCAGE WALK, LONDON (PAPER NUMBER C444/016/93)
• Publication Date: 1993

Language

• English

Media Info

• Features: References;
• Pagination: p. 161-71

Subject/Index Terms

• TRT Terms: Brakes; Conferences; Design; Finite element method; Mathematical models; Sound level
• ITRD Terms: 1361: Brake; 8525: Conference; 9011: Design (overall design); 6490: Finite element method; 6473: Mathematical model; 6747: Sound level
• Subject Areas: Design; Vehicles and Equipment;

Filing Info

• Accession Number: 00632982
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-85298-853-2
• Files: ITRD
• Created Date: Jul 1 1993 12:00AM