低速磁浮线轨道钢箱梁表面温度分布及竖向挠度实测研究
刘鸣博1叶丰1曾国锋1龚俊虎2,3
Field Measurement Research of Surface Temperature Distribution and Vertical Deflection of Low-speed Maglev Track Steel Box Girder
LIU MingboYE FengZENG GuofengGong Junhu
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作者信息:1.同济大学磁浮交通工程技术研究中心， 201804， 上海
2.西南交通大学牵引动力国家重点实验室， 610031，成都
3.中铁磁浮交通投资建设有限公司， 430060， 武汉
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Affiliation:National Maglev Transportation Engineering R & D Center, Tongji University, 201804, Shanghai, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.03.001
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中图分类号/CLCN:U441+.5;U237
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栏目/Col:学术专论
摘要:
以上海临港低速磁浮线试验基地某段钢箱梁为研究对象，对钢箱梁的表面温度及竖向挠度进行长期监测，研究钢箱梁顶面和底面间温度差的概率分布特征，并通过钢箱梁的竖向挠度推算其等效线性温差。分析结果表明：威布尔分布与正态分布的加权概率模型可用于描述钢箱梁竖向表面正负温度差的概率密度分布，据此确定了具有一定重现期的钢箱梁竖向表面温度差标准值。实测竖向表面温度差与等效线性温差间基本符合线性关系，采用最小二乘法拟合得到了相应系数。
Abstracts:
Certain section of steel box girder at Shanghai Lingang low-speed maglev experiment base is taken as research subjective, and long term monitoring is conducted on the surface temperature and vertical deflection of steel box girder surface. The probability distribution characteristics of temperature difference between steel box girder top and bottom surfaces and the equivalent linear temperature difference of the steel box girder derived from the deflection are investigated. Analysis results show that the weighted probability model of the Weibull and Normal distributions can be used to describe the probability density distribution of the positive and negative temperature differences. The standard value of steel box girder vertical surface temperature difference with certain recurrence interval is determined accordingly. The measured vertical surface temperature difference and the equivalent linear temperature difference generally fits linear relationship, and the coefficient is obtained by least squares fitting.
引文 / Ref:
刘鸣博，叶丰，曾国锋，等.低速磁浮线轨道钢箱梁表面温度分布及竖向挠度实测研究[J].城市轨道交通研究，2022，25（3）:1.
LIU Mingbo, YE Feng, ZENG Guofeng, et al. Field measurement research of surface temperature distribution and vertical reflection of low-speed Maglev track steel box girder [J].Urban mass transit, 2022，25（3）:1.
LIU Mingbo, YE Feng, ZENG Guofeng, et al. Field measurement research of surface temperature distribution and vertical reflection of low-speed Maglev track steel box girder [J].Urban mass transit, 2022，25（3）:1.
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