马蒙, 李明航, 谭新宇, 曲翔宇, 张厚贵. 地铁轮轨耦合不平顺激励对轨道振动影响分析[J]. 工程力学, 2021, 38(5): 191-198. DOI: 10.6052/j.issn.1000-4750.2020.06.0421
引用本文: 马蒙, 李明航, 谭新宇, 曲翔宇, 张厚贵. 地铁轮轨耦合不平顺激励对轨道振动影响分析[J]. 工程力学, 2021, 38(5): 191-198. DOI: 10.6052/j.issn.1000-4750.2020.06.0421
MA Meng, LI Ming-hang, TAN Xin-yu, QU Xiang-yu, ZHANG Hou-gui. INFLUENCE ANALYSIS ON TRACK VIBRATION DUE TO COUPLED IRREGULARITY EXCITATION OF METRO WHEEL-TRACK[J]. Engineering Mechanics, 2021, 38(5): 191-198. DOI: 10.6052/j.issn.1000-4750.2020.06.0421
Citation: MA Meng, LI Ming-hang, TAN Xin-yu, QU Xiang-yu, ZHANG Hou-gui. INFLUENCE ANALYSIS ON TRACK VIBRATION DUE TO COUPLED IRREGULARITY EXCITATION OF METRO WHEEL-TRACK[J]. Engineering Mechanics, 2021, 38(5): 191-198. DOI: 10.6052/j.issn.1000-4750.2020.06.0421

地铁轮轨耦合不平顺激励对轨道振动影响分析

INFLUENCE ANALYSIS ON TRACK VIBRATION DUE TO COUPLED IRREGULARITY EXCITATION OF METRO WHEEL-TRACK

  • 摘要: 轮轨动态输入激励直接影响车辆-轨道耦合模型的计算结果。目前在地铁列车环境振动振源研究中,大多只考虑了轨道不平顺的激励而忽略了车轮不圆顺的影响。为了构建地铁轮轨耦合不平顺激励、综合分析轨道不平顺以及车轮、钢轨的磨耗状态对轨道动力响应的影响,对一列地铁列车进行了车轮不圆顺的现场测试,同时对一段区间隧道内的轨道不平顺和钢轨粗糙度均进行了测试。基于车辆-轨道耦合频域解析模型计算了轨道动力响应,比较了不同轮轨激励模式对计算结果的影响。同时,在同一区间隧道内实测了钢轨振动响应,用以验证不同激励模式计算结果的准确性。结果表明:美国谱和Sato谱会低估车轮不圆顺典型波长控制频段的振动响应,从而难以准确获得8 Hz~200 Hz频段的振动响应;按能量叠加方法获得的轮轨耦合不平顺谱可反映完备的轮轨激励信息,以此作为激励,在8 Hz~200 Hz频段,可计算获得与实测值更相近的模拟计算结果。

     

    Abstract: The input wheel-track dynamic excitation directly affects the calculation results of vehicle-track coupled models. Nowadays, in the research of metro-train induced environmental vibrations, only the track irregularity excitation was considered but the effect of wheel roughness was ignored. To establish a metro wheel-track coupled excitation and to comprehensively analyze the influences of track irregularity, the out-of-round wheels of a metro train were measured, and the track irregularities and rail roughness in a metro running tunnel were also measured. Based on the vehicle-track coupled analytical model in the frequency domain, the track dynamic responses were calculated, and the influences on the results of different wheel-track simulations were compared. Furthermore, the rail vibrations were measured in the same metro running tunnel, which were used to validate the calculation accuracy by different simulations. The research results indicate that: the vibration responses will be underestimated in typical frequency band domination by wheel irregularities using the US irregularities power spectrum density (PSD) and Sato irregularities PSD, and accordingly, it is difficult to obtain the accurate vibration responses between 8 Hz and 200 Hz. The wheel-rail coupled irregularity PSD obtained by energy superposition can reflect the complete wheel-rail excitation information, which can be used to obtain the accurate simulation results between 8 Hz and 200 Hz.

     

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