作者：何洪阳, 陈春俊, 孙宇

作者单位：西南交通大学机械工程学院, 四川 成都 610031

关键词：高速列车;隧道交会;改进的EEMD;横向平稳性

摘要：

高速列车隧道交会时形成巨大的冲击压力, 对列车横向振动产生巨大影响, 同时, 其横向振动也受轨道不平顺的影响。针对现有的经验模态分解(EMD)降噪过程中存在端点效应和模态混叠现象, 提出一种改进的集合经验模态分解(IEEMD), 并运用仿真信号验证该方法的有效性。对实测横向振动信号进行IEEDM分解, 并结合相关性系数提取出气动载荷引起的横向振动;进一步分析轨道不平顺、气动载荷以及它们共同作用对列车横向振动的影响。研究结果表明:相比于轨道不平顺, 气动载荷是引起横向振动的主要原因。

Study on lateral vibration of high-speed train when intersection in the tunnel based on improved EEMD

HE Hongyang, CHEN Chunjun, SUN Yu

College of Mechanical Engineering, Southwest Jiao Tong University, Chengdu 610031, China

Abstract: Intersection pressure is generated by the trains intersection in the tunnel which acting on the surface of high-speed train, forming a huge impact pressure and having a strong impact on the train's lateral vibration. Meanwhile, lateral vibration is also affected by track irregularity. For the phenomenon of end effects and mode mixing during the process of noise reduction by existing empirical mode decomposition (EMD), an improved ensemble empirical mode decomposition (IEEMD) method is put forward and uses this method to validate simulated signal. The measured lateral vibration signal is decomposed by IEEMD. According to correlation coefficient, lateral vibration caused by aerodynamic load is extracted; at the same time, it is analyzed that train lateral vibration is affected by track irregularity, aerodynamic load and both of them acting on together. The results show that: compared with track irregularity, the aerodynamic loads is the main cause of lateral vibration.

Keywords: high-speed train;tunnel intersection;improved EEMD;lateral stability

2015, 41(6): 86-90  收稿日期: 2014-10-21;收到修改稿日期: 2014-12-29

基金项目: 国家自然科学基金项目(51475387)

作者简介: 何洪阳(1988-),男,四川巴中市人,硕士研究生,专业方向为自动控制、高速列车气动性能测试和振动控制。

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