Equivalent conicity

The dynamic interaction between railway vehicle and track is fundamental to ensure a safe and efficient operation and maintenance of the railway and can be described by using equivalent conicity. A high equivalent conicity increases instability/hunting, infrastructural damages and the risk of derailment and is therefore a vital parameter to monitor for optimization of maintenance schedules.

Know the geometric interaction between wheels and rails

  • Optimize reprofiling maintenance schedule
  • Identify critical speed limits
  • Reduce risk of derailment
  • Improve vehicle stability
  • Reduce maintenance costs

Calculations

Contact points

The contact points is a graph showing where all the contact between the wheel and rail profiles were found.

Contact angles

The contact angles shows a graph of the left and right contact angle and the difference between the left and right angle relative to the wheelset displacement.

Rolling radius difference

The rolling radius difference shows a graph of the difference rolling radius relative to the wheelset displacement.

Equivalent Conicity

The equivalent conicity shows a graph with the conicity plotted relative to the wheelset displacement.