长型浮置板轨道隔振系统理论分析(Ⅱ)——传递率  

Theoretical analysis of long floating slab track(part Ⅱ)——receptance

作　　者：刘学文[1] 吴川[2] 谢军[3] 黄醒春[2] 

机构地区：[1]上海工程技术大学基础教学学院,上海201620 [2]上海交通大学船舶与海洋建筑工程学院,上海200240 [3]南昌大学电子信息工程系,南昌330031

出　　处：《计算力学学报》2009年第6期924-927,共4页Chinese Journal of Computational Mechanics

基　　金：上海市科委重点科技攻关(03DZ12017)资助项目

摘　　要：浮置板轨道结构是近年来减振降噪效果最好的轨道结构形式之一。15 m以上的浮置板通常称之为长型浮置板,其与钢轨及其他减振构件一起构成了双层隔振系统,钢轨与浮置板分别用欧拉梁来模拟,推导动力方程,由系统的频率响应函数得到传递率公式。定义了反映浮置板轨道结构参数的质量比例系数ξm、刚度比例系数kξ及阻尼比例系数cξ等三个系数,在给定实际板上结构参数的条件下,深入讨论了三个比例系数对于系统传递率的影响,从而达到对不同结构参数下,浮置板轨道系统隔振性能的初步评价,并给出三个引入参数的建议值。Floating slab track （FST） is one of the most effective countermeasures for reducing vibration induced by moving train. FST is divided into short FST （SFST） and long FST （LFST） according to the length of FST. The length of which is above 15 meters is called long floating slab track. With rail and fasteners, the structures could be treated as a Double-decked isolation system, and the formula of transmissibility of the isolation system was deduced using the receptance method. Using the receptance method, three new proposed structures parameters of FST, mass ratio, stiffness ratio and damping ratio, were deeply investigated to evaluate the effect of isolation function of the Double-decked isolation system with different structure form. And proposal values of these three ratios are given here to define the most suitable form of FST when the others values of rail and fasteners are known as actual ones.

关 键 词：长型浮置板轨道 隔振 传递率 

分 类 号：U213.242[交通运输工程—道路与铁道工程]