项目名称： 网络时滞动力学观点下人行桥过度侧向振动新机制

项目编号： No.11472160

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 镇斌

作者单位： 上海理工大学

项目金额： 100万元

中文摘要： 行人行走导致的人行桥侧向振动问题是当前桥梁工程、物理、生物力学等众多领域关心的学术热点。桥上大量行人如何同步行走最终引发桥的过度侧向振动是这些研究领域最为关心的问题。本项目计划将桥上单个行人视为网络中的节点，节点动力学行为综合考虑人-桥和人-人之间的相互作用，从而将人行桥上大量行人同步行走导致人行桥过度侧向振动机理的研究转化为时滞网络中各种复杂同步现象的研究，具体研究计划如下：(1)行人激励下人-桥相互作用机理的研究 (2)人行桥上大量行人行走时人-人相互作用机理的研究 (3)进行必要的实验确保人-桥和人-人相互作用机理研究的可靠性 (4)网络时滞动力学观点下网络同步现象的研究。研究目的是弄清楚大量行人同步行走的影响因素，确定人行桥侧向失稳的临界条件与桥上行人同步行走之间的对应关系，为我国人行桥设计规范的修订提供依据，为后期可能出现的动力减振提供相应的思路和参考。

中文关键词： 网络动力学；时滞；同步行走；人-桥耦合振动；过度侧向振动

英文摘要： Lateral vibration of footbridges induced by pedestrians has become a topic of great interest in many fields including bridge engineering, physics, biomechanics etc. in the last decade. How large numbers of persons on a footbridge synchronize their footsteps to cause excessive lateral vibration of the footbridge is the top issue for this problem. In this project, we attempt to regard every single person on a footbridge as one node in a network consisted of all pedestrians on the footbridge. The dynamics of every node is determined by considering both the interaction between a person and the footbridge and that between persons. Then the study on mechanism that pedestrians tending to walk in synchronization result in excessive lateral vibration of the footbridge can be carried out by researching various kinds of complex synchronization phenomena in the network. The work will be completed is as follows: (1) Study mechanism of the interaction between pedestrians and a footbridge (2) Study mechanism of the interaction between pedestrians when a big crowd cross a footbridge (3) Experiment to guarantee the reliability of the study on mechanism of both the interaction between pedestrians and a footbridge and that between pedestrians (4) Study mechanism that a big crowd tend to walk in synchronization under the viewpoints of dynamics of networks with time delay. The study is aimed at finding out the affecting factors of walk synchronization of a big crowd crossing a footbridge, and determining the correspondence between the critical conditions of lateral instability of the footbridge and walk synchronization of pedestrians. The results of this project can provide a basis for revision of the design code of footbridges of our country and offer thinking of study and consult for vibration reduction that might appear.

英文关键词： dynamics of networks;time delay;walk synchronization;pedestrians and footbridge coupling vibration;excessive lateral vibration