无碴轨动车组运行引起的场地振动试验研究  

A test of the ground vibrations induced by ballastless truck running

作　　者：葛勇[1] 张希黔[1,2] 肖正直[1] 严春风[3] 詹永祥[3] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]中国建筑第三工程局有限公司,武汉430070 [3]西南交通大学土木工程学院,成都610031

出　　处：《振动与冲击》2010年第11期209-212,241,共5页Journal of Vibration and Shock

基　　金：重庆市科委自然科学基金计划资助项目(CSTC;2010BB9207)

摘　　要：为研究场地振动加速度衰减特性,对我国首条无碴轨道试验段—渝遂铁路的CRH2动车组运行的场地振动进行了实测。基于最小二乘法,拟合了场地竖向加速度振级的一阶指数和二次多项式衰减经验公式后分析表明:一阶指数函数衰减模型更符合实际。应用正交经验模式分解法和Hilbert变换对场地竖向振动加速度信号进行频谱分析,得到了振动信号的Hilbert边际谱;对比分析表明:Hilbert边际谱较Fourier谱能更好地反映动车组引起的场地振动信号的频谱特性。In order to study vertical acceleration decay laws of ground vibration,the field vibration induced by an impetus locomotive CRH2 were measured on the SuiYu ballastless truck.Through establishing the empirical formula of vertical vibration acceleration level decay laws on the basis of least-squares criterion,the analysis showed that a first-order exponential function is better than a quadratic polynomial function to fit the experiment data.Based on EMD and HHT,comparative analysis showed that using marginal Hilbert spectrum to study the ground vibration is more suitable than using Fourier spectrum.

关 键 词：无碴轨道 场地振动 现场实测 1/3倍频程 Hilbert边际谱 

分 类 号：TU457[建筑科学—岩土工程]