人群简化模型与人行桥TMD参数设计研究

用两段连续弹性杆模拟静立人体，建立人群-人行桥-调谐质量阻尼器(TMD)振动系统。将静立人群简化建模为单个的广义人体，研究广义人体-人行桥-调谐质量阻尼器振动系统的动力特性及TMD参数设计。运用最小二乘原理确定广义人体的相关参数，通过与已有的实验数据对比，验证了将静立人群简化为广义人体模型的正确性。以均方根加速度作为人体舒适度的优化准则，分析了人行桥TMD的最优频率比和最优阻尼比。    

The simplified model of crowd and the parameter design of TMD for footbridges

This paper used a continuous-elastic bar with two segments to model the body standing on a footbridge and built the crowd-footbridge-tuned mass damper (TMD) vibration system. By simplifying the static crowd as a generalized human body, we studied the dynamic characteristics of the generalized human-footbridge-tuned mass damper vibration system and the parameter design of TMD. We identified the parameters of generalized human body through the principle of least square. Comparing with the data available from experiments, the correctness of simplifying the static crowd to a generalized human was verified. Utilizing the root-mean-square acceleration as the optimization criterion to assess the degree of human body comfort, the optimal parameters of a TMD system were discussed.