高速动车组车下设备准零刚度吊挂研究

Study on quasi-zero stiffness suspension of high-speed EMU

提出一种具有高静刚度、低动刚度特性的车下设备准零刚度吊挂方法,分析了准零刚度吊挂元件的力-位移和刚度-位移特性。建立高速动车组车辆刚柔耦合动力学模型,研究了车下设备含激励源情况下,准零刚度吊挂元件对车下设备与车体的减振效果。结果表明,与刚性吊挂和弹性吊挂方法相比,准零刚度吊挂方法可以更好地降低车下设备及车体的振动,并提高车辆运行平稳性。

A quasi zero stiffness(QZS) suspension with high static stiffness and low dynamic stiffness characteristics is proposed. The force-displacement and stiffness-displacement characteristics of the QZS suspension element are analyzed. A rigid-flexible coupled dynamics model of a high-speed EMU vehicle is established, and the vibration reduction effect of the QZS suspension components on the under-chassis equipment and the car body is studied when the under-chassis equipment contains an excitation source. The results show that compared with the rigid connection and elastic suspension methods, the QZS suspension can better reduce the influence of the vehicle body vibration of the under-chassis equipment and improve the ride quality of the high-speed EMU trains.