| 变速移动荷载下轨道结构动力响应解析解研究 |
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| 引用本文： | 李克飞,刘维宁,贾颖绚.变速移动荷载下轨道结构动力响应解析解研究[J].工程力学,2011(9):207-213. |
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| 作者姓名： | 李克飞 刘维宁 贾颖绚 |
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| 作者单位： | 北京交通大学土木建筑工程学院;都市快轨交通杂志社; |
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| 基金项目： | 国家自然科学基金项目(51008017,50848046); 北京交通大学优秀博士生创新研究基金项目(141067522) |
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| 摘 要： | 为了研究列车进出站对周围环境的振动影响，推导了轨道结构在变速移动荷载作用下动力响应的解析解形式。首先以Duhamel积分为基础，应用动力互等定理，得到了变速移动荷载作用下，半无限弹性空间体上任意点动力响应的一般表达式；然后在该式的基础上，针对轨道结构的周期性特点，将荷载沿钢轨的移动问题转化为拾振点以轨枕间距为周期向反方...
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| 关 键 词： | 轨道结构 移动荷载 变速 周期解析解 动力响应 |
AN ANALYTICAL SOLUTION FOR RAILWAY TRACK STRUCTURE RESPONSE UNDER MOVING LOADS WITH VARIABLE SPEEDS |
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| LI Ke-fei,LIU Wei-ning,JIA Ying-xuan.AN ANALYTICAL SOLUTION FOR RAILWAY TRACK STRUCTURE RESPONSE UNDER MOVING LOADS WITH VARIABLE SPEEDS[J].Engineering Mechanics,2011(9):207-213. |
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| Authors: | LI Ke-fei LIU Wei-ning JIA Ying-xuan |
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| Affiliation: | LI Ke-fei1,LIU Wei-ning1,JIA Ying-xuan1,2(1.School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China,2.Urban Rapid Rail Transit Press,China) |
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| Abstract: | In order to study the environmental vibration response due to entering-station and leaving-station trains on their railway,a new dynamic periodic close form solution is introduced for the railway structure subjected to moving loads with variable speeds in this paper.Firstly,the general dynamical response in an elastic half space model subjected to the surface moving loads is obtained on the basis of Duhamel integral and dynamic reciprocity theorem.Secondly,in the case of a periodic railway track structure,t... |
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| Keywords: | track structure moving loads variable speeds periodic analytical solution dynamic response |
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