铁道标准设计2017，Vol.61Issue(10)：1-4,10,5.DOI:10.13238/j.issn.1004-2954.2017.10.001
CRTSⅡ型板式无砟轨道-桥梁耦合模型中的钢轨与底座板频响特性研究
Research on Frequency-Response Characteristics of Rail and Base Plate in CRTS Ⅱ Ballastless Slab Track-Bridge Coupling Model
摘要
Abstract
For CRTS type Ⅱ ballastless slab track commonly used on high-speed railway,the rail and base plate can be modeled as Euler-Bernoulli beam of infinite length when a 2D model established based on the characteristics of the track.Firstly,according to the basic principle of dynamics,the motion differential equation of an infinite Euler-Bernoulli beam excited by a harmonic load is established.With steady-state solution and integral transformation,the frequency response functions of displacement,velocity and acceleration are obtained.The spectrum characteristics and attenuations of the displacement,velocity and acceleration frequency responses of CHN 60 rail are explored with deduced frequency response functions.The results show that the displacement and velocity frequency responses of the rail decrease with the increase of frequency,however,the acceleration frequency response expands with the increase of frequency.Moreover,frequency response attenuation of the displacement decreases obviously with the increase of frequency.The frequency response attenuation of the velocity achieves its maximum in 10 ～ 100 Hz and that of the acceleration expands with the increase of frequency.关键词
CRTSⅡ型板式无砟轨道/无限长Euler-Bernoulli梁/频率响应函数/Laplace(逆)变换/留数法Key words
CRTS Ⅱ ballastless slab track/Infinite Euler-Bernoulli beam/mobility/Laplace (inverse) transform/Residual algorithm分类
交通工程引用本文复制引用
张志俊,汪力,张挣鑫,徐桂弘..CRTSⅡ型板式无砟轨道-桥梁耦合模型中的钢轨与底座板频响特性研究[J].铁道标准设计,2017,61(10):1-4,10,5.基金项目
国家自然科学基金(51508121) （51508121）
贵州省科技厅基金项目(黔科合LH字[2014]7374,黔科合J字[2015]2063),黔科合J字[2015]2062号) （黔科合LH字[2014]7374,黔科合J字[2015]2063）
