摘要
北京地铁5号线天通苑站至天通苑北站之间铺设了一段长为171 m的梯形轨枕轨道试验段.为了得出符合城市轨道交通实际情况的轨道不平顺谱,对梯形轨枕轨道试验段进行了轨道不平顺测量,并对轨道不平顺功率谱进行了拟合,得出了拟合曲线的特征参数.通过对测量结果进行幅值分析和功率谱分析可知,北京地铁5号线梯形轨枕轨道试验段的轨道平顺状态较好.
As a new type of noise and vibration mitigating track, the ladder track trial section has been built on the elevated bridge of Beijing Metro Line 5 between Tiantongyuan Station and Tiantongyuan North Station, with full length of 171 m. To obtain the actual track irregularity spectra of urban rail transit as a reference for other urban traffic and for the dynamic analysis of ladder track, the track irregularities were measured and the PSD （power spectral density） was acquired. In addition, the curves of the PSDs are fit and the characteristic parameters are obtained. Through analysis of amplitudes and power spectra of the measured data, the results show that the track irregularity of ladder track of Beijing Metro Line 5 is in good state.
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2010年第4期102-106,共5页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家自然科学基金资助项目(50538010)
北京市自然科学基金资助项目(8082021)
比利时-中国政府间合作项目(BIL07/07)
关键词
轨道不平顺
地铁
高架桥梁
梯形轨枕
功率谱密度
拟合模型
track irregularity
metro line
viaduct
ladder track
power spectral density
fitting model
