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工程设计学报
工程设计学报  2007, Vol. 14 Issue (3): 226-230    
工程设计理论、方法与技术     
基于随机过程跨越理论的钢轨动力可靠性分析与比较
徐劲，谢伟平，蒋沧如
武汉理工大学 土木工程与建筑学院， 湖北 武汉 430070
Dynamic reliability analysis and compare of rail based on random process over-crossing theory
XU  Jin，XIE  Wei-Ping，JIANG  Cang-Ru
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
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摘要： 采用模态分析方法建立车辆-轨道垂向耦合动力计算模型，使用Wilson-θ数值积分方法，得到钢轨在列车荷载作用下的随机振动响应。基于随机过程跨越理论，得到在不同的跨越假设以及极值分布条件下钢轨的动力响应可靠度，并与数值模拟法计算的结果进行比较。结果表明：对于低跨越界限，极值I型分布方法的计算结果与精确值最为接近；而对于高界限，高斯分布法效果最好。
关键词： 随机过程;  跨越理论;  动力可靠性    
Abstract: The vertical coupling dynamic model of vehicle-track is established by means of modal analysis and by utilizing Wilson-θ numerical integral method, the random response of rails are achieved. Based on random process over-crossing theory, dynamic response reliability of rail under various over-crossing hypothesis and extremum distribution are obtained, and then it is compared with the result of numerical simulation calculation. The results indicate that for lower over-crossing limit, the calculation result of Gumbel-distribution method is theclosest to the exact value; while for high over-crossing limit, Gauss-distribution has the best effectiveness.
Key words: random process    over-crossing theory    dynamic reliability
出版日期: 2007-06-28
基金资助:

湖北省建设厅建设科技项目资助(k200555)
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引用本文:

徐劲，谢伟平，蒋沧如. 基于随机过程跨越理论的钢轨动力可靠性分析与比较[J]. 工程设计学报, 2007, 14(3): 226-230.

XU Jin，XIE Wei-Ping，JIANG Cang-Ru. Dynamic reliability analysis and compare of rail based on random process over-crossing theory[J]. Chinese Journal of Engineering Design, 2007, 14(3): 226-230.

链接本文:

https://www.zjujournals.com/gcsjxb/CN/    或    https://www.zjujournals.com/gcsjxb/CN/Y2007/V14/I3/226

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