Passenger car wheel profile for the operation on the Ukrainian and European railways

The relevance of this work stems from the urgent need for modern development Ukrainian railway transport and acceleration Ukraine's integration into European transportation. Currently, most effective way to travel across borders between countries with different track gauges is use gauge-changeable wheelsets, a system that can change one gauge another when moving through special changing facilities. cars wheelsets on railways calls assuring good compatibility wheel-rail pair tracks both gauges. goal was develop unified wheel profile operation domestic predict safety profile, ride quality, processes dynamic interaction parameters. Use made methods deformable solid mechanics, statistical dynamics, numerical integration. A family profiles constructed, effectiveness their in passenger car (1520 mm gauge) (1435 evaluated. For each spatial problem wheel?rail contact solved, parameters were analyzed, including dimensions location patches. Calculations also negotiating circular curve small radius (R = 300 m) at speeds tangent sections. choice among constructed according two criteria: flange wear stability. Based studies conducted, new wear-resistant ITM-73EP, proposed. Its will provide reasonable indices wheel–rail without sacrificing performance.