摘要
因动车组在高速交会时产生的瞬变交会压力波对车体侧壁变形、列车运行噪声及运行安全性都有不可忽视的影响,该文利用高速列车的实际测试数据,从3方面对高速列车在明线交汇和隧道交汇情况下的压力波进行深入分析:交会压力波的时-频特性,主要参数值及其与车速的关系,交会压力波对车体侧壁振动的激励作用。特别对压力波所产生的冲击响应谱进行深入分析,得到不同阻尼比下的频率响应。该文分析结果为进一步研究瞬变交会压力波对车体侧壁变形的影响、对列车运行噪声的贡献等提供新的参考依据。
The air pressure wave is a transient excitation to car body side, which can stimulatealmost all vibration modes of car body and correlated assemblies and cause serious aerodynamicnoise, posing threats to operation safety. Based on field-measured air pressure waves, this articlemainly analyzes the time-frequency characteristics of air pressure wave, the relationship betweenits main parameters and train velocity, and the vibration of car body caused by it. In particular,the response spectrum of the pressure wave is analyzed, and the frequency response of thedifferent damping ratio is obtained. The conclusion has been derived. It provides new evidences fortrain noise and car body distortion.
作者
刘璐
高品贤
LIU L u;GAO Pinxian(School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031,China)
出处
《中国测试》
CAS
北大核心
2016年第7期93-96,共4页
China Measurement & Test
基金
国家自然科学基金项目(61134002)
国家重点实验室开放课题(PIL1303)
关键词
高速列车
交会压力波
瞬态激励
振动模态
high-speed train
air pressure wave
transient excitation
modes of vibration
