THE EFFECT OF WHEEL AND RAIL IRREGULARITIES ON THE TRACK

This paper reviews the effect of track irregularities and wheelflats in causing dynamic increments in wheel/rail force. The role of vehicle unsprung mass and track characteristics in governing the size of dynamic increments is examined. It is shown that an increase in axle load will result in more rapid initial deterioration at joints and other soft spots and that for freight vehicles running over irregularities due to joints and welds, the dynamic forces should depend on the parameter sq MV. The causes of irregularities in welded track are discussed and the importance of producing straight long welded rail is emphasised. Recent experimental and theoretical work on wheelflat impacts is described and the consequences of a wheelflat coinciding with P2 type forces due to joint or weld irregularities are considered. The importance of developing quantitative track damage models to assess the increased permanent way costs associated with heavier axle loads is emphasised.

Media Info

  • Features: Appendices; Figures; References;
  • Pagination: p. 1-14

Subject/Index Terms

Filing Info

  • Accession Number: 00303677
  • Record Type: Publication
  • Report/Paper Numbers: Session 204 Pap G.2 Conf Paper
  • Files: TRIS
  • Created Date: Feb 11 1980 12:00AM