钢弹簧浮置板动力吸振器设计

Design and Research of Dynamic Vibration Absorber for Steel Spring Floating Plate

基于动力吸振器定点扩展理论,将单自由度动力吸振器设计理论与多模态控制理论相结合,应用于浮置板轨道动力吸振器设计中,并根据有限元模型中车辆荷载作用下浮置板轨道道床100 Hz内的振动频谱特性,确定动力吸振器的制振频段,结合相应频段内浮置板振动模态,设计动力吸振器参数和安装位置。通过对安装动力吸振器前后车辆荷载作用下浮置板轨道道床振动响应进行对比,发现采用该方法设计出的动力吸振器能够有效降低道床板目标频段的振动,同时钢轨在该频段附近的振动也得到相应的抑制。

This study combines and uses the design theory of a single-degree of freedom dynamic vibration absorber and the multi-mode control theory to a dynamic vibration absorber design of a floating slab track based on the fixed-point expansion theory of dynamic absorbers. The target frequency band of the dynamic vibration absorber is determined according to the finite element model of the floating slab vibration spectrum characteristics under 100 Hz. The parameters and the installation position of the dynamic vibration absorber are designed according to the vibration modes of the floating plate. A comparison of the vibration responses of the floating slab with and without the absorber showed that the method can effectively reduce the vibration level in the target band. The rail vibrations were also reduced.