中文摘要：

为研究高速动车明线会车时引起其横向振动的主要原因以及分析气动载荷对于动车组运行稳定性的影响,以线路实验采集的车体表面压力与列车振动数据为基础,利用EMD分解得到振动信号的各个本征模（IMF）分量;对分解后的IMF分量进行相关性分析,利用相关性原理来重构振动信号。重构信号即为气动载荷作用下的动车组横向振动。对比分析动车组在有气动载荷与无气动载荷下的横向稳定性。结果表明：明线会车时气动载荷引起的横向振动频率主要集中在低频段0.3~10 Hz内,动车组横向振动加速度及横向平稳性的影响比只考虑轨道不平顺时要明显增大,明线会车时气动载荷是引起列车横向振动的主要原因。

英文摘要：

The lateral stability of high-speed EMUs whenpassing by each other on an open track would be affected badly at the intersection by track irregularity and aerodynamic loads.To find out the causes of vibration and analyze how the aerodynamic load affects EMU stability,the method namely empirical mode decomposition（EMD） is employed to analyze and obtain each intrinsic mode function（IMF） of vibration signals based on the experimental data-collected surface pressure and vibration data of a train. The correlativity of thedecomposed IMF is analyzed and the vibration signal is restructured with the correlation theory. The reconstructed signal is the transverse vibration of the train under the action of aerodynamic loads.The lateral stability of the train with and without aerodynamic loads is comparatively analyzed. The results indicate that the frequency of transverse vibration caused by aerodynamic loads when the trains pass each other on the open track is mainly within 0.3-10 Hz,and influence ratio of lateral acceleration and lateral stability is greatly increased if only track irregularity is considered. So, it can be seen that the main reasonof transverse vibration is aerodynamic load.