| 轨枕吊空对轨道结构动力性能的影响 |
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| 引用本文： | 朱剑月,张艳.轨枕吊空对轨道结构动力性能的影响[J].中国铁道科学,2011,32(3). |
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| 作者姓名： | 朱剑月 张艳 |
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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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| 基金项目： | 同济大学优秀青年教师基金资助项目 |
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| 摘 要： | 运用车辆一轨道耦合动力学理论,模拟计算轨枕吊空状态下轮轨系统的动力响应,比较分析列车运行速度和吊空轨枕数量埘轨道结构动力性能的影响,并对时域与频域内室内模型试验线进行测试分析和验证.结果表明:轨枕吊空破坏了轨道结构支承的连续性,轮轨间相互作用加剧,并随吊空数量的增加与列车运行速度的提高而显著增大;同时,轨枕吊空将影响其前后毗邻的正常轨道结构的动态特性,形成线路几何与动态不平顺,影响车辆运行平稳性与乘坐舒适度.钢轨与轨枕频响函数测试表明,由于轨枕吊空改变了该区段轨枕间距和轨下支承刚度,削弱了道床对线路所提供的阻尼,使得轨道结构的动力性能也产生了显著变化.
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| 关 键 词： | 轨道结构 轨枕吊空 轮轨相互作用 试验验证 频响函数 |
Investigation on the Dynamic Characteristics of Track Structure with Hanging Sleepers |
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| ZHU Jianyue,ZHANG Yan.Investigation on the Dynamic Characteristics of Track Structure with Hanging Sleepers[J].China Railway Science,2011,32(3). |
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| Authors: | ZHU Jianyue ZHANG Yan |
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| Institution: | ZHU Jianyue,ZHANG Yan(Institute of Railway and Urban Mass Transit,Tongji University,Shanghai 200092,China) |
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| Abstract: | Considering the vehicle's running speed and the number of the unsupported sleepers,the track dynamic behaviour was investigated based on vehicle-track coupling dynamics and verified by the experiments in time and frequency domains on an indoor scale wheel/rail test rig.The results show that as the existed hanging sleepers leading to a discontinuous and irregular track support,the wheel-rail interaction is excited and becomes obviously larger as further sleepers become unsupported and as the vehicle's runnin... |
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| Keywords: | Track structure Hanging sleeper Wheel-rail interaction Experimental verification Frequency-response function |
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