基于有限元功率流的桥梁-承轨台轨道结构振动特性研究  

Analysis of Structural Vibration Characteristic of Bridge-Supporting Block Track Based on Finite Element Power Flow

作　　者：陈敏敏[1] 练松良[1] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《石家庄铁道大学学报（自然科学版）》2011年第4期35-39,共5页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(50878158)

摘　　要：用功率流理论从能量的角度研究轨道结构的振动特性,它兼顾了力和速度的相位关系,比传统的以力、位移、加速度和速度等单个指标来衡量振动特性更具有综合性。建立了桥梁-承轨台轨道有限元模型,对其进行谐响应分析,从而得到输入钢轨和承轨台的总功率流,进而评价其振动特性。改变扣件的刚度和阻尼,研究扣件参数的改变对于钢轨和承轨台输入总功率流的影响。The theory of power flow, which takes account of phase relationship between force and velocity,is used to investigate the features of track vibration from an angle of power, and is more comprehensive than tra- ditional methods that just take single indicators, such as force, displacement, acceleration or velocity to measure the vibration of track. Finite element model of bridge-supporting block track is set up in this paper. After taking harmonic response analysis on it, the total power flow input into the rail and the supporting blocks can be calcu- lated, and the vibration characteristic of the model can be evaluated. Different stiffness and damp of the fasteners are taken into account in order to research the influences of the total power flow inputting into the rail and the supporting blocks due to the changes of the parameters of the fasteners.

关 键 词：有限元功率流 承轨台轨道 谐响应分析 振动 

分 类 号：U211[交通运输工程—道路与铁道工程]