| 地震作用下高速列车-线路-桥梁系统动力响应 |
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| 引用本文： | 王少林,翟婉明.地震作用下高速列车-线路-桥梁系统动力响应[J].西南交通大学学报,2011,46(1):56-62,67. |
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| 作者姓名： | 王少林 翟婉明 |
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| 作者单位： | 西南交通大学牵引动力国家重点实验室,四川,成都,610031 |
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| 基金项目： | 国家973计划资助项目(2007CB714706); 国家自然科学基金资助项目(50823004);国家自然科学基金创新研究群体项目(50821063); “十一五”国家科技支撑计划资助项目(2009BAG12A01-B02-1) |
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| 摘 要： | 为分析地震对高速列车通过桥梁时行车安全性的影响,基于高速铁路列车-线路-桥梁动力相互作用理论,建立了考虑地震输入的高速列车-线路-桥梁耦合动力学模型.以跨度32 m的简支箱梁桥和双块式无砟轨道为研究对象,对地震作用下高速列车通过桥梁时系统的动力响应进行了数值计算.结果表明:地震对高速列车-线路-桥梁系统动力响应的影响明显,对桥梁横向振动响应的影响大于对竖向振动响应的影响;地震会降低高速列车通过桥梁时的行车安全性和运行平稳性———在水平1.0 m/s2,竖向0.5 m/s2的规格化El Centro地震波作用下,当列车运行速度超过250 km/h时,轮重减载率超过了安全限值;当列车运行速度达300 km/h时,脱轨系数超过了安全限值.因此,评判地震作用下高速列车通过桥梁时的行车安全性,应考虑行车速度的影响.
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| 关 键 词： | 高速列车 桥梁 动力响应 地震作用 行车安全性 |
Dynamic Responses of High-Speed Train-Track-Bridge System under Seismic Excitations |
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| WANG Shaolin,ZHAI Wanming.Dynamic Responses of High-Speed Train-Track-Bridge System under Seismic Excitations[J].Journal of Southwest Jiaotong University,2011,46(1):56-62,67. |
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| Authors: | WANG Shaolin ZHAI Wanming |
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| Institution: | WANG Shaolin,ZHAI Wanming(Traction Power State Key Laboratory,Southwest Jiaotong University,Chengdu 610031,China) |
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| Abstract: | In order to analyze the effects of seismic excitations on the running safety of a high-speed train passing a bridge,a train-track-bridge dynamic model considering seismic loads was set up based on the train-track-bridge dynamic interaction theory.As an example,a simply supported beam with a span of 32 m and bi-block track was modeled,and the dynamic responses of a high-speed train-track-bridge system under seismic excitations were analyzed.The results show that the effects of an earthquake on the dynamic re... |
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| Keywords: | high-speed train bridge dynamic response seismic excitation running safety |
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