| 铰接式岔枕道岔结构落轴冲击数值分析 |
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| 引用本文： | 朱剑月.铰接式岔枕道岔结构落轴冲击数值分析[J].同济大学学报(自然科学版),2011,39(8):1155-1160. |
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| 作者姓名： | 朱剑月 |
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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,200092 |
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| 摘 要： | 考虑岔枕下道床的非线性支承和联结铰结构,建立了三维弹性铰链单元数值模拟方法和整组道岔落轴冲击有限元模型,比较分析了时域与频域内铰接式与普通长岔枕道岔结构的振动响应.结果表明:与普通岔枕相比,铰接式岔枕轨道结构的整体刚度较低,缓和了轮轨冲击,改善了道岔区的综合受力环境;改变了普通岔枕的动态特性,极大程度上降低了高速列车过岔时未行车股道岔枕末端对道床的拍击,减少了道砟粉化,延长了道床养护维修周期;道岔区采用高弹性扣件,可与铰接岔枕组合成优良的弹性基础,优化高速道岔动力性能.
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| 关 键 词： | 铰接式岔枕 道岔 落轴冲击 动力性能 有限元法 |
| 收稿时间： | 2010/4/26 0:00:00 |
| 修稿时间： | 5/4/2011 7:25:54 PM |
Numerical Analysis on Dynamic Behavior of Articulated Switch Sleeper in Turnout System Under Wheel Load Drop |
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| ZHU Jianyue.Numerical Analysis on Dynamic Behavior of Articulated Switch Sleeper in Turnout System Under Wheel Load Drop[J].Journal of Tongji University(Natural Science),2011,39(8):1155-1160. |
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| Authors: | ZHU Jianyue |
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| Institution: | Institute of Railway and Urban Mass Transit, Tongji University, Shanghai 200092, China |
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| Abstract: | Based on the numerical algorithm of a three-dimensional flexible joint element to furnish the stiffness and damping in transverse,vertical and rotational directions,a calculation model under wheel load drop according to the finite-element method is built,and,the dynamic responses in time and frequency domain are studied respectively for a whole turnout structure with articulated or integral switch sleepers impacted by a falling wheel-set,considering the nonlinear characteristic of the ballast's support unde... |
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| Keywords: | articulated switch sleeper turnout wheel load drop dynamic behavior finite-element method |
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