东南大学学报（英文版）2017，Vol.33Issue(2)：209-215,7.DOI:10.3969/j.issn.1003-7985.2017.02.014
基于生物力学模型人-桥竖向动力耦合作用及其振动控制研究
Vibration control of pedestrian-bridge vertical dynamic coupling interaction based on biodynamic model
摘要
Abstract
The human-induced vertical vibration serviceability of low-frequency and lightweight footbridges is studied based on the moving mass-spring-damper(MMSD)biodynamic model,and the mass damper(TMD)with different optimal model parameters being used to control the vertical vibration.First,the MMSD biodynamic model is employed to simulate the pedestrians,and the time-varying control equations of the vertical dynamic coupling system of the pedestrian-bridge-TMD are established with the consideration of pedestrian-bridge dynamic interaction;and the equations are solved by using the Runge-Kutta-Felhberg integral method with variable step size.Secondly,the footbridge dynamic response is calculated under the model of pedestrian-structure dynamic interaction and the model of moving load when the pedestrian pace frequency is consistent with the natural frequency of footbridge.Finally,a comparative study and analysis are made on the control effects of the vertical dynamic coupling system in different optimal models of the TMD.The calculation results show that the pedestrian-bridge dynamic interaction cannot be ignored when the vertical human-induced vibration serviceability of low-frequency and light-weight footbridge is evaluated.The TMD can effectively reduce the vibration under the resonance of pedestrian-bridge,and TMD parameters are recommended for the determination by the Warburton optimization model.关键词
人行桥/振动舒适度/生物力学/动力耦合系统/振动控制Key words
footbridge/vibration serviceability/biodynamic/dynamic coupling system/vibration control分类
交通工程引用本文复制引用
朱前坤,李宏男,南娜娜,杜永峰..基于生物力学模型人-桥竖向动力耦合作用及其振动控制研究[J].东南大学学报（英文版）,2017,33(2):209-215,7.基金项目
The National Natural Science Foundation of China(No.51508257,51668042,51578274),the Yangtze River Scholar and the Innovation Team of Ministry of Education(No.IRT13068),the Scientific Research Project of Gansu Higher Education(No.2015B-34). （No.51508257,51668042,51578274）
