| 深季节冻土区列车行驶路基振动数值模拟研究 |
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| 引用本文： | 王子玉,凌贤长,惠舒清,刘宏扬,赵莹莹,耿林.深季节冻土区列车行驶路基振动数值模拟研究[J].地震学刊,2014(1):1-6. |
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| 作者姓名： | 王子玉 凌贤长 惠舒清 刘宏扬 赵莹莹 耿林 |
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| 作者单位： | [1]哈尔滨工业大学土木工程学院,哈尔滨150090 [2]神华包神铁路集团公司,内蒙古包头014014 |
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| 基金项目： | 国家自然科学基金项目（51174261、51078111）; 铁道部科技研究开发计划课题（2009G010-E）资助 |
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| 摘 要： | 分析大庆深季节冻土区铁路路基的冬季现场加速度监测结果,获得了列车经过时铁路路基冻结地表振动加速度的时程特性及其衰减规律,并运用动力有限元方法进行了动力响应分析。研究结果表明：①随着列车行驶速度的增大,路基振动加速度亦增大,且重载货车振动响应大于高速客车;②列车行驶引起的路基振动加速度幅值,随着距线路中心距离的增加而迅速衰减;③应用有限元方法分析列车行驶路基振动特性是可行的。本文为研究深季节冻土区铁路路基振动特性提供了一种分析方法,对加深了解深季节冻土区铁路路基振动特性具有重要意义。
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| 关 键 词： | 现场监测 振动响应 有限元分析 季节冻土区 铁路路基 |
Numerical Simulation of Vibration Response of Railway Subgrade to Passing Train in Deep Seasonal Frozen Soil Region |
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| WANG Zi-yu,LING Xian-zhang,HUI Shu-qing,LIU Hong-yang,ZHAO Ying-ying,GENG Lin.Numerical Simulation of Vibration Response of Railway Subgrade to Passing Train in Deep Seasonal Frozen Soil Region[J].Journal of Seismology,2014(1):1-6. |
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| Authors: | WANG Zi-yu LING Xian-zhang HUI Shu-qing LIU Hong-yang ZHAO Ying-ying GENG Lin |
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| Institution: | 1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; 2. Shenhua Baoshen Railway Group Corporation, Baotou 014014, China) |
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| Abstract: | Through the field monitoring experiment of railway subgrade in Daqing seasonal frozen region in winter, the vibration response of the subgrade and its attenuation law were investiga, ted, and the dynamic finite element method was applied to dynamic response numerical calcula- tion. The results show that （1） as train speeds increase, the subgrade vibration increases, and the vibration induced by a freight train is greater than that by a passenger train; （2） as the dis- tance to the central line of the railway increases, the amplitude of vibration acceleration induced by passing train decreases rapidly; （3） the field monitoring results verify the feasibility of the dy- namic finite element method in research on vibration behavior of railway subgrade in frozen soil region and the method has an important significance in understanding the problem discussed deep- ly. |
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| Keywords: | field monitoring vibration response finite element analysis seasonal frozen soil re-gion railway subgrade |
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