Research on Equivalent Conicity Boundary Based on Power Car Swing
During power centralized EMU operation,swing-phenomenon of power car occurs,which leads to the deceleration of vehicles and affects the operation order.In order to find out the swing cause,field test was carried out and the swing mechanism was analyzed on the power car.The simulation model was verified by the field test data,and the equivalent conicity boundary condition of the power car swing were simulated.The field test shows that the wheel/rail matching equivalent conicity is too small,which triggers the swing of the carbody,and the lateral stability of the carbody reaches 3.1.The damping ratio of the snake mode of the vehicle body is small.When the running speed is greater than 140 km/h and the equivalent conicity is small,it is easy to excite the carbody snaking and cause the phenomenon of swing,and the frequency of the vehicle swing is near 0.8-1.2 Hz.The measured wheel tread is input into the dynamic model for simulation,and it is found that the equivalent conicity boundary of the vehicle is 0.043.This limit value can be used to evaluate the quality of wheel repair and rail grinding.
power carfield testcar swing problemwheel/rail matchingequivalent conicity boundary
万方数据
维普
