摘要
以上海城市轨道交通的轨道不平顺检测数据为样本,对城市轨道交通轨道不平顺的特征进行分析。首先,利用轨道不平顺变化率法和经验模态分解法对检测数据进行预处理,有效消除轨距和轨向不平顺检测数据的异常值和非线性趋势线,其次,对检测数据进行功率谱密度分析,并与美国6级轨道谱、德国铁路高低干扰谱和中国提速干线7参数谱进行比较,结果表明:除短波波段外,城市轨道交通轨道不平顺谱和德国铁路低干扰谱水平相当,优于美国6级轨道谱、德国铁路高干扰谱和中国提速干线谱;然后,利用相干函数对轨道不平顺和轴箱垂向和水平振动加速度进行相干分析,得出城市轨道交通轨道不平顺不利波长范围;最后,建议将轨道不平顺谱纳入到轨道质量管理指标中。
According to the track geometry data collected by track recording vehicles from Shanghai urban rail tran-sitt,he characteristic of track irregularity is analyzed.Firstlyt,he elimination methods of abnormal value and nonlin-ear trend are given and used in the data preprocessing of track irregularities on urban rail transit based on the change rate of track irregularity and the method of empirical mode decomposition.Secondly,power spectral density is calcu-lated with Matlab program,and compared with US class 6 railways,German railway spectra of high irregularity and low irregularity,and China main railway spectra.The statistic and analyzing result indicates that the track irregularity spectrum values of Shanghai urban rail transit are close to German railway spectra of low irregularity except for short wavelength bands and better than US class 6 railways,German railway spectra of high irregularity,and China main railway spectra.Furthermoret,he coherence functions are utilized to analyze the relationship between track irregulari-ties and vertical / lateral axle box accelerations;a conclusion is drawn about the range of detrimental track irregularity wavelengths.Finallyt,he track irregularity spectrum is suggested as an index to control track geometry irregularity.
出处
《华东交通大学学报》
2011年第5期83-87,共5页
Journal of East China Jiaotong University
基金
国家自然科学基金项目(5087158)
铁路环境振动与噪声教育部工程研究中心开放研究项目
关键词
城市轨道交通
轨道不平顺
功率谱密度
相干分析
urban rail transit
track irregularity
power spectral density
coherence analysis
