Selection of wheel and rail profiles for hunting test

A hunting test is conducted on new rolling stock with the aim of avoiding hunting in revenue service. It is widely recognised that hollowing of the wheel treads can have an adverse effect on the hunting tendency however the effect of track conditions has frequently been underestimated. Metal flow on the head of a rail tends to flatten the crown and decrease the radius of the gauge corner. This change in shape significantly increases the effective conicity for wheels with moderate wear making them more prone to hunting. Tight gauge exacerbates the situation but is not the sole cause. Grinding of the rail to relieve the gauge corner shifts the contact on the wheel further from the flange and decreases the effective conicity. This increases the critical speed above which hunting will occur. This paper discusses how certain aspects of the wheel and rail profile affect the effective conicity, and how these considerations need to be taken into account in determining the wheel and rail profile conditions for hunting tests. The interaction of some Australian wheel and rail profiles is explored and compared with overseas literature. Case studies illustrate how extensive hunting may occur in service if the choice of wheel and rail profiles for the hunting tests is inappropriate.

Media Info

  • Pagination: 10p.
  • Monograph Title: Rejuvenation and renaissance: CORE 2010: conference on railway engineering, 12-15 September 2010, Wellington, New Zealand

Subject/Index Terms

Filing Info

  • Accession Number: 01517083
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Mar 4 2014 8:07PM