青藏铁路轨道不平顺变化特征  

Research on the Track Irregularity Variation Characteristics of the Qinghai-Tibet Railway

作　　者：董连成[1,2] 王定营 李广影[1] 赵淑萍[2] 喻文兵[2] 李洪东[1] 

机构地区：[1]黑龙江科技大学建筑工程学院,黑龙江哈尔滨150022 [2]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000

出　　处：《沈阳建筑大学学报（自然科学版）》2013年第6期1013-1018,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(41023003);黑龙江省自然科学基金项目(E201227);中国科学院冻土工程国家重点实验室开放基金课题(SKLFSE201103);黑龙江省教育厅科学技术研究项目(12511486;11551442);黑龙江科技大学青年才俊培养计划资助

摘　　要：目的分析青藏铁路实际轨道检测数据,研究轨道不平顺的轨道谱变化特征及特点,为青藏铁路的正常运营提供技术支持.方法通过GJ-4型轨检车对青藏铁路的轨道进行了不平顺数据的采集,对采集数据的异常值进行了处理与修正,采用的轮次法检验了所采集数据的平稳性,运用改进的平均周期图法计算了青藏铁路轨道谱,并对功率谱密度曲线进行了拟合.结果青藏铁路轨检车检测数据为平稳信号,青藏铁路各类轨道不平顺主要集中分布在空间频率为[10-1,100]范围附近,不平顺随机波形的波长组成成分分布在[0.1,100]m的区间内.功率谱密度曲线表明振动主要产生在波长[1,10]m区间范围内,铁轨左、右高低和左、右轨向的功率谱密度图相近或基本相同.结论目前青藏铁路轨道状态较好,通过对轨检车实测记录的分析,得到该路线轨道不平顺的状况,为青藏铁路的正常运营提供了技术支持.The detected data by the track inspection car of Qinghai-Tibet railway were analyzed and studied. The spectrum characteristics of track irregularity were investigated. Irregularity data of the Qinghai-Tibet rail- way were collected by the GJ4 type track inspection car, the abnormal value of collected data were processed and modified, round method was used to test the stationarity of collected data, the Qinghai-Tibet railway track spectrum were calculated by the improved averaged periodogram method and the power spectral density curve were fitted. The detected data by the track inspection car were stationary signal, the railway track irreg- ularity of Qinghai-Tibet mainly were concentrated in the frequency ofl 10 -1,1001, the wave lengths of irreg- ularity were mainly distributed in[0. 1,100 ] m. Power spectral density curves showed that the vibration was mainly produced in the wavelength of[ 1,10 ] m and the track density spectrum of right and left track were similar, the track irregularity of relative position between two strands of track were basically similar. This study clearly indicates that the track condition of Qinghai-Tibet is good, the track irregularity can be obtained through analyzing the detected data by the track inspection car and results from this research provide the technical support for normal operation of the Qinghai-Tibet railway.

关 键 词：青藏铁路 轨道不平顺 轨道谱 改进的平均周期图法 

分 类 号：TU365[建筑科学—结构工程] U239.5[交通运输工程—道路与铁道工程]