摘要
开展了幅值相关阻尼比在车桥耦合振动中的应用研究。编制了车桥耦合振动计算程序,利用相关文献提出了振幅相关阻尼比和加速度幅值相关阻尼比的计算方法,结合一座简支箱梁桥,计算了实际桥梁位移幅值和加速度幅值相关阻尼比,并且对比了采用常阻尼比0.05和采用幅值相关阻尼比的车桥耦合振动响应。对比结果发现,采用幅值相关阻尼计算的响应结果小于采用常阻尼比0.05的响应计算结果,其中加速度相关阻尼比的计算结果和实测结果吻合度较高。幅值相关阻尼比是车桥耦合振动中阻尼比取值的一种很好方法,并且求解的结果有着较高的精度。
The application of amplitude related damping ratio in vehicle-bridge coupling vibration is researched. The vehicle-bridge coupling vibration calculation program is compiled, the calculation method of the related damping ratios of vibration amplitude and acceleration amplitude is purposed based on related literature. The related damping ratios of displacement amplitude and acceleration amplitude of a simply supported box girder bridge are calculated, and the vehicle-bridge coupling vibration responses with ordinary damping ratio of O. 05 and amplitude related damping ratio are calculated. The comparative result shows that （ 1 ） the response result using amplitude related damping is less than that using the ordinary damping ratio of 0. 05, the coincidence between the response using acceleration amplitude related damping ratio and the measured result is higher; （2） using amplitude related damping ratio is a good way for determining the damping ratio in vehicle-bridge coupling vibration calculation, and it can obtain higher precision.
出处
《公路交通科技》
CAS
CSCD
北大核心
2015年第5期88-94,共7页
Journal of Highway and Transportation Research and Development
基金
交通运输部公路科学研究院基本科研业务费项目
关键词
桥梁工程
车桥耦合振动
振型叠加法
幅值相关阻尼
位移幅值
加速度幅值
bridge engineering
vehicle-bridge coupling vibration
mode superposition method
amplitude related damping
displacement amplitude
acceleration amplitude
