Admittance Characteristics of Wheelset under High Frequency Excitation

The admittance characteristics of four kinds of Chinese wheelsets under high frequency excitation are analyzed. Results show that the highest admittance is in the axial ( i.e. , lateral) direction of wheelset spoke, and the main way to reduce the high frequency vibrations is to reduce the wheelset spoke lateral admittance. Reducing wheel vibrations can be accomplished by adjusting the wheelset stiffness distribution, making full use of the admittance phase, and modifying the wheel rail contact characteristics.