摘要
通过对我国某高速铁路路基区段高速列车引起的周围环境地面振动进行现场实测,根据测试数据进行了功率谱分析、Z振级分析和1/3倍频程分析。分析结果表明,列车以250~350 km·h-1高速运行时,在距轨道中心线水平距离30~60 m处,地面振动随列车速度的提高而增大;地面振动能量主频在40 Hz左右;地面各处振动呈波动式变化,随距离传播规律是平均每10 m减少2~3 dB,且高频振动的衰减速度大于低频振动的衰减速度,远离振源处以低频振动为主。
In this paper,on-the-spot measurement of the ground vibration induced by high-speed railway is conducted.According to the data,the Pow Spectrum,the z-level vibration and 1/3 octave band are analyzed.The results show that when the vehicle speed is 250-350 km·h -1,the vibration level away from centerline of 30-60 m will increase with the vehicle speed.The main frequency of vibration energy is about 40 Hz.The vibration level has fluctuation changing trend and decreases 2-3 dB every ten miles.The attenuating speed of high frequency vibration is greater than that of low frequency vibration.At the same time,the low-frequency vibration dominates the far places.
出处
《华东交通大学学报》
2011年第4期19-22,共4页
Journal of East China Jiaotong University
基金
国家自然科学基金项目(50978099)
江西省优势科技创新团队计划项目([2010]210)
关键词
高速铁路
地面振动
振动特性
high-speed railroad
ground-borne vibration
vibration characteristic
