Abstract: The relationship among the wheel-rail profiles, rolling circle radius differences and distribution state of the wheel-rail contact points are obtained through wheel-rail contact geometry derivation and the parallel programming is developed to reverse design the wheel profile based on the rolling circle radius difference. According to the measured wheel treads in different period in one re-profile cycle, the effects of wheel wear on equivalent conicity and critical hunting speed is researched, and the regularity between critical speed and equivalent conicity is obtained. The gradient of the worn wheel tread is analyzed, and the strategy for preventing the hollow wear of the tread is put forward. Finally the equivalent conicity is adjusted rationally based on the measured wheel tread, and wheel profile is designed using the parallel programming. The wheel-rail contact geometry characteristics, wheel-rail contact mechanical properties and the vehicle dynamic behaviors are investigated with the new designed wheel tread. The results show that the wheel profile reverse design method has high computation efficiency and good convergence. The wheel-rail contact performances and the vehicle dynamics behaviors are improved and can meet the high speed running requirement. When the wheel is worn, the vehicle has better dynamic behaviors with new designed wheel, and the wheel tread live-span will be expanded.

Key words: High-speed vehicle, Parallel computing, Profile design, Rolling radius difference, Wheel-rail