铁道标准设计2016，Vol.60Issue(9)：32-35,36,5.DOI:10.13238/j.issn.1004-2954.2016.09.007
有砟轨道动刚度特性研究
Study on Dynamic Stiffness of Ballasted Track
摘要
Abstract
In order to understand the dynamic characteristics of rail track, a mechanical model of ballast railway track is developed to analyze the dynamic stiffness under excitation frequency ranging from 0 Hz to 2000Hz. The dynamic stiffness varies with excitation frequency, which is different from the static stiffness. The excitation frequency has little effect on dynamic stiffness in case of low frequency, but the amplitude varies with the excitation frequency in mid and high frequencies. As it is an inherent characteristic, such measures as adjusting the stiffness or damping of components can be taken to diminish the effect. The damping coefficient of the railway track has some effect on the amplitude of dynamic stiffness but has no effect on resonant frequency. Mass damping coefficient has a smaller effect on the scope and amplitude of dynamic stiffness than stiffness damping coefficient. The amplitude of dynamic stiffness increases with the increasing of damping coefficient.关键词
有砟轨道/动刚度/振动特性/阻尼系数Key words
Ballast railway track/Dynamic stiffness/Characteristics of vibration/Damping coefficient分类
交通工程引用本文复制引用
亓伟,陈伯靖,段海滨,刘玉涛..有砟轨道动刚度特性研究[J].铁道标准设计,2016,60(9):32-35,36,5.基金项目
国家杰出青年科学基金(51425804) （51425804）
国家自然科学基金(重点项目)(U1334203&U1234201) （重点项目）
