车-桥系统的振动分析及控制  

VIBRATION ANALYSIS AND CONTROL ON VEHICLE-BRIDGE SYSTEM

作　　者：彭献[1] 殷新锋[1] 茆秋华[1] 

机构地区：[1]湖南大学力学与航空航天学院,长沙410082

出　　处：《动力学与控制学报》2006年第3期253-258,共6页Journal of Dynamics and Control

基　　金：湖南大学SIT计划资助项目(12-04)~~

摘　　要：推导出了由变速行驶车辆与不同边界和路面不平桥梁组成的系统,在安装调质阻尼器(TMD)后的无量纲运动微分方程.作为其特例,研究了匀变速车辆与简谐路面简支桥梁系统,获得了桥梁跨中的无量纲最大挠度随加速度、减速度、初速度、质量比和路面不平度的变化规律,并对系统发生共振时进行TMD控制.数值计算表明:加速度、减速度、初速度和质量比对桥梁的影响均很大;路面不平度对桥梁的影响不可忽略,因为它甚至有可能使桥梁产生共振;TMD可明显减小桥梁的共振振幅.The dimensionless differential equations of motion of system, which consists of the bridge with rugged surface and the vehicle with variable speeds, were derived after a tuned mass damper （TMD） was installed. The system of the simple-supported bridge with simple harmonic surface and the vehicle with uniformly variable speeds was researched. The variable regularities of the mid-span dimensionless maximal deflection of the bridge were obtained with acceleration, deceleration, initial speed, mass ratio and roughness of bridge deck, and the resonance vibration was controlled by using TMD. Numerical results show that the effects of the acceleration, deceleration, initial speed and mass ratio on the bridge are very large, and the roughness of bridge deck can＇ t be ignored because it produces the possibility of resonance vibration. The maximal amplitude of resonance vibration was reduced by TMD.

关 键 词：车-桥系统 不平路面 变速运动 振动分析 振动控制 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]