秦沈客运专线板式无砟轨道不平顺功率谱分析(x)

第5卷　第6期2008年12月

铁道科学与工程学报

JOURNAL O F RA I L WAY SC I ENC E AND EN G I N EER I N G

Vo l15　No16

D e c.2008

秦沈客运专线板式无砟轨道不平顺功率谱分析

金守华1,曾志平2,陈秀方2,曾华亮2

(1.中国铁建股份有限公司,北京100855;2.中南大学土木工程博士后流动站,湖南长沙410075)

摘　要:以秦沈客运专线轨检车实测轨道不平顺数据为统计样本,基于样本平稳性检验,采用FFT方法进行样本空间的谱估计,并由MAT LAB编程得到轨道不平顺谱密度和相关函数。通过对比分析,发现无砟轨道不平顺优于有砟轨道,高低和方向不平顺尤为突出;在8m以下波段内无砟轨道不平顺很好,无明显周期性成分;无砟轨道左右股钢轨横向不平顺控制均匀;左右两轨高低不平顺相关性较强,方向不平顺相关性较弱。基于样本的总体平均,运用非线性最小二乘拟合优化算法,得出无砟轨道不平顺谱密度拟合曲线参数值,对于研究我国无砟轨道不平顺功率谱有参考价值。

关键词:客运专线;无砟轨道;轨道不平顺;功率谱密度

中图分类号:U213.2 文献标识码:A 文章编号:1672-7029(2008)06-0017-05

PS D analysis of slab track irregularity of Q inhuangdao-Shenyang

dedicated passenger rail w ay line

J IN Shou2hua1,ZE NG Zhi2p ing2,CHEN Xiu2fang2,ZE NG Hua2liang2

(1.China Rail w ay Constructi on Cor porati on L i m ited,Beijing100855,China;

2.Post-doct orWork Stati on of Civil Engineering,Central South University,Changsha410075,China)

Abstract:The statistic s peci m en was collected by track geometry ins pecti on car fr om Q inhuangdao-Shenyang dedicated passenger rail w ay line.Based on the stati onarity test of the s peci m en,Fast Fourier Transf or m(FFT) method was used t o evaluate the s pectrum of the whole s peci m en s pace.The power s pectrum density(PS D)and related functi ons of track irregularity were obtained by MAT LAB p r ogra m.By the contrast analysis,it is f ound that ballastless track irregularity is better than ballasted track irregularity,es pecially track vertical p r ofile irregu2 larity and track align ment irregularity.Ballastless track irregularity with wavelength less than8m is very good, and there is no re markably peri odic component.The left and right rail lateral irregularity of ballastless track is u2 nif or m.The correlati on of vertical p r ofile irregularity of left and right rail is str ong,and the correlati on of align2 ment irregularity is weak.Based on t otal average of the s peci m en of the track irregularity,the para meter values of PS D fitting curve f or ballastless track irregularity are obtained by the nonlinear curve-fitting algorithm in the least-squares sense,which has referencing value t o study ballastless track irregularity PS D.

Key words:dedicated passenger rail w ay line;ballastless track;track irregularity;power s pectral density

轨道不平顺使列车簧下质量产生共振,造成列车与轨道振动及行车噪音,影响行车平稳和舒适。高速铁路对轨道不平顺要求十分严格[1]。世界各国广泛采用功率谱密度来描述轨道不平顺状态并测定了各自的轨道不平顺谱密度和相关函数。我国对轨道不平顺谱密度进行了较多研究[2-8],但对客运专线无砟轨道不平顺谱密度研究甚少。在此,本文作者将秦沈客运专线有砟轨道

3收稿日期:2008-09-17

基金项目:铁道部科技开发计划项目(2007G044-O-2-B,2004G05-A;中国博士后基金(20080440993)作者简介:金守华(1963-),男,安徽全椒人,博士,教授级高工,从事道路与铁道工程研究