| 不同温度力下无缝线路钢轨振动特性分析 |
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| 引用本文： | 罗雁云 朱剑月 冯奇. 不同温度力下无缝线路钢轨振动特性分析[J]. 力学季刊, 2006, 27(2): 279-285 |
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| 作者姓名： | 罗雁云 朱剑月 冯奇 |
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| 作者单位： | 同济大学,铁道与城市轨道交通研究院,上海,200331;同济大学,航空航天与力学学院,上海,200092 |
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| 基金项目： | 国家自然科学基金项目资助(50378070) |
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| 摘 要： | 根据能量法和Timoshenko梁理论,运用振型叠加法建立轴向载荷作用下无缝线路钢轨谐响应有限元模型,分析了不同温度力作用对轨道结构钢轨振动特性的影响。在理论分析的基础上,通过建立实验模型对不同温度力作用下轨道结构钢轨振动特性进行了实验研究,并与理论分析进行了对比。结果表明所建立的理论模型能够比较全面地反映无缝线路结构在温度力作用下的主要振动特征,对应用振动特性来研究无缝线路的温度力和预测其安全可靠性有一定的指导作用。
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| 关 键 词： | 无缝线路 Timoshenko梁 有限元 自振频率 |
| 文章编号： | 0254-0053（2006）02-279-7 |
| 收稿时间： | 2005-10-08 |
| 修稿时间： | 2005-10-08 |
CWR Vibration Characteristic Analysis under Different Temperature Force |
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| LUO Yan-yun , ZHU Jian-yue , FENG Qi. CWR Vibration Characteristic Analysis under Different Temperature Force[J]. Chinese Quarterly Mechanics, 2006, 27(2): 279-285 |
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| Authors: | LUO Yan-yun ZHU Jian-yue FENG Qi |
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| Abstract: | According to the energy method and Timoshenko beam theory,the FEM model analyzing harmonic response of CWR(continunes welded rail) under the axially load was developed based on the mode superposition method.The CWR vibration characteristic was analyzed by using the model through the different longitudinal temperature force.The experiment model was also established.The character was investigated through this model and two results were compared.It shows that the main vibration characteristics of CWR track can be demonstrated by the analytical model.It is useful for estimating the bucking of CWR through vibration character using this model. |
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| Keywords: | CWR Timoshenko beam FEM nature frequency |
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