地铁车辆段上盖结构振动特性分析

Analysis on Vibration Characteristics of Metro Depot Cover Structure

摘要: 针对地铁车辆段上部结构存在的振动舒适度超标问题，本文以某地铁车辆段及上部结构工程为背景，在考虑土体对振动传播影响的基础上建立有限元模型，分析不同列车运行方向作用下，上部结构的传播规律，研究表明：车辆段上部结构在列车荷载作用下引起的振动以竖向振动为主；列车沿上部结构刚度最大方向运行时引起的振动效应最小；上盖结构竖向振动强度在垂直方向上随着楼层的升高主要呈现先减小后增大的规律，在水平方向上随着距离轨道中心线距离的增加而呈现衰减的趋势。

Abstract: In view of the problem that the vibration comfort of the superstructure of Metro Depot exceeds the standard, this paper takes a Metro Depot and superstructure project as the background, establishes a finite element model based on considering the influence of soil on the vibration propagation, analyzes the propagation law of the superstructure under the action of different train running directions, and the research shows that: the vibration of the superstructure of Metro Depot under the action of train load The results show that the main dynamic mode is vertical vibration; the vibration effect caused by the train running along the direction of the maximum stiffness of the upper structure is the smallest; the vertical vibration intensity of the upper cover structure decreases first and then increases with the rise of the floor in the vertical direction, and decreases with the increase of the distance from the track center line in the horizontal direction.