基于双足步行模型和反馈机制的人体-结构相互作用

发布时间：2018-04-09 11:19

  本文选题：人体-结构相互作用　切入点：双足步行模型　出处：《建筑结构学报》2014年S1期

【摘要】：基于生物动力学中的双足步行模型研究人体-结构相互作用,采用Lagrange方程推导人体-结构相互作用系统的运动方程。提出时变阻尼假定,使支撑脚刚接触地面时人体产生的地面反力为零。通过施加水平控制力的反馈机制保持行走中的步态稳定。采用自编Matlab程序进行数值分析,将基于双足模型的两座人行天桥的人体-结构相互作用计算结果与基于时域的外激励模型的计算结果进行对比。研究结果表明,对于柔度较大的人行天桥,人体-结构相互作用较大,每一步的人体动力响应有所不同,步行中产生的桥面反力也随着行人向跨中移动而逐渐增大,需要施加更大的水平控制力来保持步态稳定。
[Abstract]:Based on biped walking model in biomechanics, the human-structure interaction is studied, and the motion equation of human-structure interaction system is derived by Lagrange equation.The assumption of time-varying damping is put forward to make the ground reaction of human body zero when the supporting foot is in contact with the ground.Gait stability during walking is maintained by the feedback mechanism of applying horizontal control force.The numerical results of the human-structure interaction of two footbridges based on biped model are compared with those of the external excitation model based on time-domain.The results show that for the footbridge with higher flexibility, the human-structure interaction is greater, and the dynamic response of the human body is different with each step, and the reaction force of the bridge deck generated in the walking step increases gradually with the pedestrian moving toward the middle of the bridge.Greater horizontal control is needed to maintain gait stability.
【作者单位】： 中国电子工程设计院;北京交通大学土木建筑工程学院;
【基金】：国家自然科学基金重点项目(50938008)
【分类号】：TU311.3
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本文编号：1726195