Fatigue strength analysis of unified wheel for Shanghai metro vehicles

To analyze the fatigue strength of unified wheel for Shanghai metro vehicles,finite element models of unified wheels of Shanghai metro vehicles and Shanghai metro Line 11 wheels are built.According to the UIC standards of International Union of Railways and EN Standards of Europe,the stress of the two types of wheels is simulated under running conditions of straight line,curving and switch crossing.The calculation method on fatigue strength of wheel is analyzed,and the fatigue strength of the two wheels are evaluated with Haigh diagrams.The results show that both the wheels satisfy the UIC and EN requirements of static strength and fatigue strength.In addition,the static strength of unified wheel is better than that of Line 11 wheel under curving and switch crossing condition,and the fatigue strength of Line 11 wheel is better than that of the Shanghai unified wheel.