| 基于Poisson过程的桥梁交通激励模型及结构动响应分析 |
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| 引用本文： | 张彬,吴子燕,杨海峰,宋静.基于Poisson过程的桥梁交通激励模型及结构动响应分析[J].振动与冲击,2008,27(12). |
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| 作者姓名： | 张彬 吴子燕 杨海峰 宋静 |
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| 作者单位： | 西北工业大学力学与土木建筑学院,西安,710072 |
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| 基金项目： | 国家863项目
，
西北工业大学研究生创业种子基金
，
国家自然科学基金项目
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| 摘 要： | 提出一种基于Poisson过程的桥梁交通激励模型,建立了该激励模型的谱密度矩阵,并研究了这种激励模型的性质;基于随机振动理论和平稳随机过程理论,分析了这种激励模型作用下桥梁结构的动响应.数值分析表明:该模型能反映桥梁交通激励的空间相关性,接近桥梁所受实际交通荷载,对桥梁系统识别研究具有重要的理论意义和应用价值.
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| 关 键 词： | 交通激励模型 Poisson过程 谱密度矩阵 结构响应 |
POISSON PROCESS-BASED TRAFFIC EXCITATION MODEL FOR HIGHWAY BRIDGES AND ITS STRUCTURAL DYNAMIC RESPONSE ANALYSIS |
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| ZHANG Bin,WU Zi-yan,YANG Hai-feng,SONG Jing.POISSON PROCESS-BASED TRAFFIC EXCITATION MODEL FOR HIGHWAY BRIDGES AND ITS STRUCTURAL DYNAMIC RESPONSE ANALYSIS[J].Journal of Vibration and Shock,2008,27(12). |
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| Authors: | ZHANG Bin WU Zi-yan YANG Hai-feng SONG Jing |
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| Affiliation: | ZHANG Bin,WU Zi-yan,YANG Hai-feng,SONG Jing(School of Mechanics,Civil Engineering , Architecture,Northwestern Polytechnic University,Xi\'an 710072,China) |
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| Abstract: | A stochastic model of traffic excitation was developed based on Poisson process.The spectrum density matrix of the proposed model was constructed and its properties are investigated.The frequency domain and time domain responses of a highway bridge subjected to the proposed excitation model were analysed with the theory of random vibration in consideration of the characteristics of stationary random process.Numerical example shows that the proposed model can response the spatial correlation of the traffic e... |
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| Keywords: | traffic excitation model Poisson process spectrum density matrix structural dynamic response |
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