| 梁单元形函数在车桥时变系统振动分析中的选取研究 |
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| 引用本文： | 李东平,孔旭光,周智辉,王宁波.梁单元形函数在车桥时变系统振动分析中的选取研究[J].铁道科学与工程学报,2010,7(6). |
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| 作者姓名： | 李东平 孔旭光 周智辉 王宁波 |
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| 作者单位： | 中南大学,土木建筑学院,湖南,长沙,410075;中南大学,土木建筑学院,湖南,长沙,410075;中南大学,土木建筑学院,湖南,长沙,410075;中南大学,土木建筑学院,湖南,长沙,410075 |
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| 基金项目： | 国家自然科学基金资助项目(50908232) |
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| 摘 要： | 在阐述移动连接单元动力特性的基础上,提出了车桥时变系统振动分析中梁单元形函数所应满足的条件;导出了适合此系统振动分析的梁单元五次形函数,并通过算例分析了梁单元形函数的选取对此系统振动响应的影响。计算结果表明:选用三次形函数会导致梁单元结点处曲率的不连续,影响此系统振动响应的计算精度;选用五次形函数满足了移动连接单元对形函数的要求,获得更精确的计算结果。
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| 关 键 词： | 车-桥时变系统 移动连接单元 形函数 振动响应 |
Research on election of beam element interpolation function in coupling vibration analysis of variational coefficient vehicle-bridge system |
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| LI Dong-ping
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KONG Xu-guang
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ZHOU Zhi-hui
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WANG Ning-bo.Research on election of beam element interpolation function in coupling vibration analysis of variational coefficient vehicle-bridge system[J].Journal of Railway Science and Engineering,2010,7(6). |
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| Authors: | LI Dong-ping KONG Xu-guang ZHOU Zhi-hui WANG Ning-bo |
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| Institution: | LI Dong-ping,KONG Xu-guang,ZHOU Zhi-hui,WANG Ning-bo(Civil Architectural Engineering College,Central South University,Changsha 410075,China) |
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| Abstract: | Based on the study of moving-connecting-element,the defect of three-Hermitian interpolation function in dealing with dynamics finite element problems were analyzed,and a new type of interpolation function was proposed in this paper.Several illustration examples were presented to analyze the dynamic responses of different interpolation function.The result shows that: Stiffness matrix of this time-varying system which conduced by three-Hermitian interpolation function is discontinuous at the nodes of beam ele... |
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| Keywords: | vehicle-bridge time-varying system moving-connecting-element shape function dynamic responses |
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