移动荷载作用下简支梁桥振动响应分析  

Vibration Response Analysis of Simple Supported Beam Bridge under Moving Load

作　　者：郑嘉俊[1] 刘文会[1] 孙海蛟[1] 宋和骏 ZHENG Jia-jun;LIU Wen-hui;SUN Hai-jiao;SONG He-jun(School of Transportation Science and Engineering,Jilin Jianzhu University,Changchun130118,China)

机构地区：[1]吉林建筑大学交通科学与工程学院,长春130118

出　　处：《吉林建筑大学学报》2018年第2期13-16,47,共5页Journal of Jilin Jianzhu University

摘　　要：桥梁在车辆行驶的激励下会产生振动,振动过程中桥梁的振动频率、位移等是桥梁损伤检测、计算等需要的重要参数.为了更好地识别桥梁模态和损伤,可以利用车辆作为激励源.本文选择经典的Euler-Bernoulli梁模型,利用ANSYS有限元软件计算出了简支梁在移动力和移动质量作用下的桥梁跨中挠度和频率.结果表明,两种模型得到的桥梁跨中挠度曲线并不一样,移动质量模型系统的各阶频率还与位置有关.The bridge will vibrate under the excitation of vehicle driving.The vibration frequency and displacement of bridge are important parameters for bridge damage detection and calculation.In order to better identify the modal and damage of bridge,vehicle can be used as excitation source.This paper chooses Euler-Bernoulli beam model,using ANSYS finite element software to calculate the deflection and frequency span simply supported bridges under moving force and moving mass under the action of the bridge.The results show that two kinds of model of deflection curve is not the same,the frequency of moving mass model of the system is related to the location.

关 键 词：振动响应 简支梁 ANSYS 移动力 

分 类 号：TU311.3[建筑科学—结构工程]