公路曲线梁桥车桥耦合振动数值分析  

Numerical analysis for coupled vibration of vehicle-bridge on highway curved-bridge

作　　者：周新平[1,2] 宋一凡[1] 贺拴海[1] 

机构地区：[1]长安大学桥梁与隧道陕西省重点实验室,陕西西安710064 [2]中交第一公路勘察设计研究院有限公司,陕西西安710075

出　　处：《长安大学学报（自然科学版）》2009年第6期41-46,共6页Journal of Chang’an University(Natural Science Edition)

基　　金：交通部交通应用基础研究项目(200431981210)

摘　　要：分别应用广义虚功原理和有限元法建立车辆和桥梁的振动方程,根据车-桥两系统之间随时间变化的接触点满足接触力和位移的协调条件,应用通用结构分析软件ANSYS建立车桥耦合振动响应的有限元迭代分析模型,并进行数值求解。以一座公路曲线梁桥为例,分别进行了不同车速和是否计入离心力、桥面不平整度等条件下的车桥耦合振动响应分析。结果表明:离心力对桥梁竖向动态响应影响不大,但使桥梁扭转角动态响应加剧;随着车辆速度的增加,振动响应波动的幅值越来越大,频率越来越低,周期变长;桥面不平整度对桥梁的车桥耦合振动影响很大,分析中应予以考虑。The dynamic equations of vehicles and bridges are deduced with virtual work principle and finite element method.With the general software ANSYS,this paper studies a finite element iterative method of vehicle-bridge coupled system based on contact point meeting contact force and the compatibility conditions of displacement between the bridge and vehicle.The coupled vibration of vehicle-bridge is analyzed based on conditions of different vehicle speed and centrifugal force and unevenness of deck with the example of a highway curved-bridge.The result verifies that: centrifugal force has little influence on vertical dynamic response,but strengthen dynamic response of bridge torsion angle;with vehicle speed increasing,the amplitude of vibration is higher and higher,the frequency is lower and lower,and the period is getting longer;the unevenness of deck should be considered in analyzing its great influence on coupled vibration of vehicle-bridge.2 tabs,11 figs,18 refs.

关 键 词：桥梁工程 公路曲线梁桥 车桥耦合振动 数值分析 响应规律 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]