| 轨道不平顺波长和幅值对高速动车组动力学性能的影响分析 |
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| 引用本文： | 袁玄成,王开云,閤鑫,翟婉明.轨道不平顺波长和幅值对高速动车组动力学性能的影响分析[J].交通信息与安全,2018,36(2):1-9. |
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| 作者姓名： | 袁玄成 王开云 閤鑫 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 成都610031 |
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| 基金项目： | 中国铁路总公司科技研究开发计划重大课题国家重点研发计划子项目四川省科技计划项目 |
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| 摘 要： | 为了更有针对性地控制高速铁路轨道不平顺,保证某型高速动车组在线路上安全、平稳运行,通过动力学仿真,分析轨道不平顺波长和幅值对车辆动力学性能的影响规律,确定轨道养护维修时需重点关注的不平顺波长范围.针对某型高速动车组,将轨道不平顺简化为不同波长、不同幅值的谐波型高低、轨向、水平和扭曲不平顺,基于车辆-轨道耦合动力学模型对不平顺激扰下的车辆动力学性能进行仿真分析.分析表明,中、短波长的不平顺对轮轨动力相互作用和行车安全性有显著影响,对运行平稳性也有一定影响;中、长波长的不平顺主要影响运行平稳性.不平顺幅值对车辆动力学性能指标的影响规律基本呈线性变化,敏感波长条件下的不平顺幅值变化对系统动力响应的影响尤为显著.分析结果确定了某型高速动车组的敏感波长范围及其幅值影响规律,明确了养护维修重点,将有助于提高养护维修效率,提升高速动车组运行品质.
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| 关 键 词： | 轨道交通 高速动车组 动力学分析 车辆-轨道耦合动力学 轨道不平顺 波长 幅值 |
Influences of Track Irregularity Wavelength and Amplitude on Dynamic Performance of High-speed EMU |
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| Abstract: | In order to understand track irregularity of high-speed railways,and to guaranteeitsoperation safety,dy-namic simulations of one type of high-speed electric multiple unit(EM U)are carried out.Specifically,the influences of track irregularity wavelength and amplitude on vehicle dynamic performance are analyzed to determine the ranges of irreg-ularity wavelength,which requires special attention during track maintenance.For simplification,the track irregularity is converted to vertical profile,track alignment,track cross-level,and track twist irregularities of harmonic wave with dif-ferent wavelengths and amplitudes,and simulations are carried out based on a vehicle-track coupled dynamic model.The results show that the irregularities withinshort and mid wavelength range havesignificant impacton wheel/rail dynamic in-teraction and the safety and smoothness of train operation,which is mainly caused by the irregularities within mid and long wavelength range.The vehicle dynamic force has a linear positive relationship with the irregularity amplitude,and the change of irregularity amplitude undersensitive wavelength has significant influences on system dynamic.Analysis re-sults determine the sensitive wavelength ranges of track irregularity and corresponding influence of its amplitudeof the specific type of high-speed EMU,which highlights the key points of track maintenance,andhelpful for improvingmainte-nance efficiency as well as operation quality of EMU. |
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