TwoDimensional Dynamic Vibration Absorber of HighSpeed Electric Multiple Unit(EMU) Train Based on Negative Stiffness

Abstract:

The design method of a twodimensional dynamic vibration absorber based on acceleration is proposed, and a twodimensional dynamic vibration absorber is designed to absorb the bouncing and pitching vibration. Aimed at the requirement of low dynamic stiffness for the installation of twodimensional dynamic vibration absorber, a high static stiffness low dynamic stiffness vibration absorber is designed for the installation of twodimensional dynamic vibration absorber by using the negative stiffness characteristic of disc spring. The vertical nonlinear dynamic model of highspeed EMU is established, and the effect of twodimensional dynamic vibration absorber on vehicle vibration is analyzed. The results show that the twodimensional dynamic vibration absorber can effectively reduce the bouncing and pitching vibration of car body, and improve the running stability.