Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A novel rail corrugation suppressor using synergistic mechanism of vibration absorption and damping
Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit ( IF 1.7 ) Pub Date : 2022-08-29 , DOI: 10.1177/09544097221122081
Caiyou Zhao 1, 2 , Jiaxin Lei 1, 2 , Kai Liu 1, 2 , Rong Chen 1, 2 , Ping wang 1, 2
Affiliation  

Rail corrugation increases the intensity of interaction between the wheel and the rail, make the vehicle and track vibrate more strongly, and increase the rolling noise. Based on the fixed corrugation wavelength mechanism, this paper determines the required corrugation wavelength to be controlled using field investigations. A new type of corrugation suppressor is developed that combines a dynamic vibration absorber and a labyrinth damper. The purpose of the suppressor is to realize wide-band vibration resistance and energy consumption, and to control the vibrations in a specific frequency band. By analyzing the vibration transmission characteristics of a typical small-radius curved subway track, it is verified that the device can flatten the rail dynamic response function, suppress the pinned-pinned resonance of rail, and increase the transmission attenuation rate of rail vibrations. A coupled rigid-flexible model of vehicle and curved track is established. The rail vibration and corrugation growth rate before and after installing the suppressor are compared. The suppressor can reduce the 1000 Hz vibrations by 10.1 dB and decrease the medium and high frequency vibrations of the rail by 5.6 dB. At the same time, it can attenuate the rail corrugation growth rate near 500 Hz and between 700-1000 Hz. A field tracking test showed that the suppressor can effectively inhibit the initiation of 15-30 mm wavelength corrugation.



中文翻译:

一种采用减振和阻尼协同机制的新型钢轨波纹抑制器

钢轨波纹增加了车轮与钢轨的相互作用强度,使车辆和轨道振动更强烈,增加了滚动噪声。基于固定波纹波长机制,本文通过现场调查确定了需要控制的波纹波长。开发了一种结合动态吸振器和迷宫式阻尼器的新型波纹抑制器。抑制器的目的是实现宽频带的抗振和能量消耗,控制特定频带的振动。通过对典型小半径曲线地铁轨道的振动传递特性分析,验证了该装置可以使钢轨动态响应函数变平,抑制钢轨的销钉共振,提高钢轨振动的传递衰减率。建立了车辆与曲线轨道的刚柔耦合模型。比较了安装抑制器前后的钢轨振动和波纹增长速度。该抑制器可将1000Hz的振动降低10.1dB,将钢轨的中高频振动降低5.6dB。同时在500赫兹附近和700-1000赫兹之间可以衰减钢轨波纹的增长速度。现场跟踪测试表明,抑制器可以有效抑制15-30毫米波长波纹的引发。该抑制器可将1000Hz的振动降低10.1dB,将钢轨的中高频振动降低5.6dB。同时在500赫兹附近和700-1000赫兹之间可以衰减钢轨波纹的增长速度。现场跟踪测试表明,抑制器可以有效抑制15-30毫米波长波纹的引发。该抑制器可将1000Hz的振动降低10.1dB,将钢轨的中高频振动降低5.6dB。同时在500赫兹附近和700-1000赫兹之间可以衰减钢轨波纹的增长速度。现场跟踪测试表明,抑制器可以有效抑制15-30毫米波长波纹的引发。

更新日期:2022-08-29
down
wechat
bug