CAJ | 학술논문

高速铁路的高速度、高舒适性和高安全性使线路养护维修部门对轨面短波不平顺的控制和管理日益关注,钢轨预打磨作为新轨的第一次打磨修理,有消除表面缺陷,改善焊接接头平顺性等作用.以杭长高速铁路钢轨预打磨为例,从轨面短波不平顺角度分析高速铁路钢轨预打磨作业的效果.结果发现预打磨前新轨的均方根滑动平均值和峰峰值滑动平均值超限波长主要集中于30~100 mm范围内,预打磨使各波长范围内超限百分比下降明显,均达到I级标准,打磨作业效果良好.经1/3倍频程分析发现,预打磨作业对8~25 mm波长范围的短波不平顺改善量有限,且20 mm波长的周期性短波不平顺较为突出.
고속철로적고속도、고서괄성화고안전성사선로양호유수부문대궤면단파불평순적공제화관리일익관주,강궤예타마작위신궤적제일차타마수리,유소제표면결함,개선한접접두평순성등작용.이항장고속철로강궤예타마위례,종궤면단파불평순각도분석고속철로강궤예타마작업적효과.결과발현예타마전신궤적균방근활동평균치화봉봉치활동평균치초한파장주요집중우30~100 mm범위내,예타마사각파장범위내초한백분비하강명현,균체도I급표준,타마작업효과량호.경1/3배빈정분석발현,예타마작업대8~25 mm파장범위적단파불평순개선량유한,차20 mm파장적주기성단파불평순교위돌출.
High speed, comfort and security of high speed railways have attracted more attention of the mainte-nance department on short wave irregularities. Rail pre-grinding as a way of rail maintenance can eliminate rail surface defects and improve the welding joint smoothness. Based on rail pre-grinding in Hangzhou-Changsha high speed railway, this paper discusses the operation effect of pre-grinding on high speed railway in view of short wave irregularities. Results on moving average of mean square root and peak-to-peak value show that the ultralimit wavelength is within the 30-100mm range before pre-grinding. The operation of pre-grinding reduces the ultra-limit percentage obviously, and meets the first grade standard. From the aspect of 1/3 octave analysis, pre-grind-ing operation has limited improvement on short wave irregularities of 8-25mm wavelength, and it leads to the prominence of 20mm periodic waveform.