| 基于不平顺谱的轨道不平顺状态评价与识别探讨 |
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| 引用本文： | 李磊,王新敏.基于不平顺谱的轨道不平顺状态评价与识别探讨[J].石家庄铁道学院学报,2012(3):30-32,67. |
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| 作者姓名： | 李磊 王新敏 |
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| 作者单位： | [1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]石家庄铁道大学大型结构健康诊断与控制研究所,河北石家庄050043 |
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| 基金项目： | 国家自然科学基金（51008315） |
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| 摘 要： | 线路不同区段轨道质量参差不齐，但其幅频差异能很好地在各区段轨道不平顺功率谱密度（PSD）曲线上得到表征。基于此，结合沪宁客运专线轨检数据，从识别和评价两个方面对轨道平顺状态进行了研究。基于不同区段轨道谱存在幅频特性差异，提出以200m为一研究单元，通过分频段离散各单元轨道谱幅频信息，以三维图的形式进行不平顺的时频域识别分析。借鉴轨道谱分级管理的方法，同时综合波段整体不平顺和波段内各波长幅值波动程度两项指标，研究并给出了评价各里程单元平顺性的方法，将综合评价后各区段所属不平顺状态等级划分为优秀、良好、合格、失格。
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| 关 键 词： | 轨道不平顺功率谱密度 不平顺状态 时频域 识别 评价 |
Finite Element Analysis of Common Shallow Foundation |
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| Li Lei,Wang Xinmin.Finite Element Analysis of Common Shallow Foundation[J].Journal of Shijiazhuang Railway Institute,2012(3):30-32,67. |
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| Authors: | Li Lei Wang Xinmin |
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| Institution: | 1. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China ; 2. Academy of Health Diagnosis and Control for Large Structures, Shijiazhuang Tiedao University, Shijiazhuang 050043, |
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| Abstract: | This paper mainly discusses how to use finite element method to realize large complex analysis of foundation problems in the same condition as the normative method or standard frame. Through the discussion of simple effective simulation of the soil based on E. Winkler foundation model calculation, the method of the shal- low foundation calculation and analysis through ANSYS is studied. Finally, using the numerical example, this paper introduces the common foundation in various forms, and the application of the algorithm and compares it with the result from normative method . The result of this paper has certain theoretical meaning and application value in engineering practice. |
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| Keywords: | shallow foundation finite element analysis ANSYS elastic foundation beam |
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