南京南站振动响应特性研究

Research on the Vibration Response Characteristics at Nanjing South Railway Station

以南京南站为研究对象,从模态分析、谐响应分析、瞬态分析3个方面研究南京南站自身的特性以及车致振动响应特点。结果表明,南京南站属于上柔下刚的结构,楼板层结构的敏感频率范围为1～10 Hz。研究不同工况的行车特性,结果表明:不相邻的线路行车,车致振动对楼板层的振动响应影响不大,车致振动沿着垂直轨道方向和楼层高度方向呈指数形式衰减的趋势,站台层与候车厅层的频谱存在一定差距,楼板层的频率响应以0～40 Hz的低频振动为主。

Taking Nanjing South Railway Station as the research target,the nature of the station and the vehicle induced vibration response characteristics are studied from aspects of modal analysis,harmonic response analysis and transient analysis.The research results show that Nanjing South Railway Station features a structure with upper flexibility and lower rigidity,the sensitive frequency range of the floor layer structure is in 1~10 Hz.A study on the driving characteristics in different working conditions shows that the vehicle induced vibration has less effects on the vibration response of floor slab layer when cars run on non-adjacent routes,the vibration of cars decreases exponentially along the vertical track direction and the floor height direction,a certain frequency spectrum gap exists between the platform layer and the waiting hall layer,the frequency response of floor slab layer is mainly the low frequency vibration within 0~40 Hz.