Abstract: During wheel-set of railway vehicle rolling, the edges of the interference fitting surfaces between wheel seat and wheel hub are worn due to fretting. Fretting amplitudes between wheel and axle are difficult to be measured, which is one of the important factors influencing fretting characteristics. The fretting of the interference fitting of RD2 wheel-set under a load of 210 kN is simulated and analyzed by using ANSYS. The bending deformation of the wheel-set at a moment during its rolling is characterized by that of the wheel-set under a load of 210 kN which is statically on railway. The relative sliding mode and stress distribution of a certain contact node pair on the interference fitting surfaces between the wheel seat and wheel hub are obtained. The result shows that during the wheel-set rolling the contact node pair is subjected to a composite fretting consisting of reciprocating sliding and varying stress. Under an applied load of 210 kN, the maximum relative displacement in the axial direction of the contact node pair is about 32 μm and the maximum relative displacement in the circumferential direction is about 2.6 μm.

Key words: Composite fretting, Finite element, Interference fitting, Railway wheel-set