Design of Rail Grinding Profile Based on Multiple Indexes

Abstract:

An optimal design method of rail grinding profile based on multi-dimensional index is proposed. The method comprehensively considers four indexes， including vehicle stability， curve guidance， smoothness of contact characteristic function and contact uniform distribution， and reversely solves the problem based on wheel rail contact characteristic function. It can realize the automatic optimization of wheel-rail contact characteristic function and the computer intelligent design of rail grinding target profile. Taking the application of the design results in the grinding of Datong-Fenglingdu railway line of Taiyuan Railway Bureau as an example， the implementation effect was tracked and observed. The results show that the rail light band position and the measured wheel rail contact position after grinding is more reasonable， the rail surface fatigue damage and corrugation are effectively controlled， and the rail wear rate is reduced by 20% to 45%， which proves that the design method is effective.

Key words:profile design;rail grinding;vehicle dynamics;rolling radius difference