Article(id=1268884422154679196, tenantId=1146029695717560320, journalId=1268266580820377661, issueId=1268884383122494171, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1001-4632.2026.02.03, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1762963200000, receivedDateStr=2025-11-13, revisedDate=1769356800000, revisedDateStr=2026-01-26, acceptedDate=null, acceptedDateStr=null, onlineDate=1780455220973, onlineDateStr=2026-06-03, pubDate=1772294400000, pubDateStr=2026-03-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1780455220973, onlineIssueDateStr=2026-06-03, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1780455220973, creator=13701087609, updateTime=1780455220973, updator=13701087609, issue=Issue{id=1268884383122494171, tenantId=1146029695717560320, journalId=1268266580820377661, year='2026', volume='47', issue='2', pageStart='1', pageEnd='255', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1780455211667, creator=13701087609, updateTime=1780455310713, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1268884798719300557, tenantId=1146029695717560320, journalId=1268266580820377661, issueId=1268884383122494171, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1268884798723494862, tenantId=1146029695717560320, journalId=1268266580820377661, issueId=1268884383122494171, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=22, endPage=32, ext={EN=ArticleExt(id=1268884425661117342, articleId=1268884422154679196, tenantId=1146029695717560320, journalId=1268266580820377661, language=EN, title=Rail Profile Optimization Method Considering Grinding Deviation, columnId=null, journalTitle=China Railway Science, columnName=null, runingTitle=null, highlight=null, articleAbstract=
To address the problem where the gauge corner of rails is prone to negative deviation due to excessive grinding, leading to reduced wheel-rail equivalent conicity and impaired running stability of Electric Multiple Units (EMUs), a rail profile optimization method considering grinding deviation is proposed. First, taking a high-speed railway as an example, statistical analysis is conducted on the deviation of measured post-grinding rail profiles to reveal the distribution characteristics of grinding deviation, and the adverse effects of negative deviation on wheel-rail contact performance are verified through vehicle dynamics simulation. Second, the measured grinding profiles are divided into training and validation sets. With the deviation between the degraded profile and the 60N profile controlled within -0.2 mm to +0.2 mm and the nominal equivalent conicity no less than 0.034 as constraint conditions, and with the the optimization objective that the contact stress for the optimized profile matched with the LMA wheel not exceed that of the LMA-60N combination, a genetic algorithm is employed to optimize seven characteristic parameters of the 60N profile, yielding the optimized profile and the degraded profile considering negative deviation caused by excessive grinding. Finally, the performance of the optimized and degraded profiles is verified through wheel-rail contact analysis and vehicle dynamics calculation; and a comparative evaluation is conducted against the standard 60N profile and two sets of field-measured grinding profiles. The results show that: in the gauge corner region (16° - 45°), the profile deviation is predominantly negative, mainly distributed in the range of -0.8 mm to 0 mm with a mean value of approximately -0.4 mm, indicating a prominent excessive grinding problem; compared with the standard 60N profile, the optimized profile matched with the LMA wheel achieves an increased nominal equivalent conicity of 0.036 and a 14% reduction in wheel-rail contact stress, exhibits comparable dynamic performance and shows improved car body lateral stability; the deviation between the degraded profile and the 60N profile is controlled within -0.2 mm to +0.2 mm, with a nominal equivalent conicity of 0.034, satisfying the design constraints and effectively resolving the problem of excessively low equivalent conicity; compared with the two sets of field-measured grinding profiles, the degraded profile demonstrates significant advantages in both dynamic and contact mechanical performance, with reductions of 19% in wheelset lateral acceleration, 7% in bogie frame lateral acceleration, and 13% in car body lateral acceleration, as well as reductions of 19% - 37% in maximum normal contact stress and 33% - 41% in maximum tangential contact stress, along with significantly reduced average contact stress and more concentrated distribution. The proposed profile optimization method provides a reference for field grinding operations and offers guidance for addressing the low conicity hunting problem of EMUs.
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针对高速铁路钢轨轨距角易因过量打磨产生负偏差导致轮轨等效锥度降低,从而影响动车组运行平稳性的问题,提出了一种考虑打磨偏差的钢轨廓形优化方法。首先,以某高速铁路为例,对打磨后实测钢轨廓形的偏差进行统计分析,揭示打磨偏差分布特征,并通过车辆动力学仿真验证负偏差对轮轨匹配性能的不利影响;其次,将实测打磨廓形划分为训练集和验证集,以退化廓形与60N廓形偏差控制在-0.2~+0.2 mm范围内、名义等效锥度不小于0.034为约束条件,以LMA型车轮与优化廓形匹配的接触应力不高于LMA-60N组合为优化目标,采用遗传算法对60N廓形的7个特征参数进行优化,获得优化廓形及考虑过量打磨引起负偏差后的退化廓形;最后,通过轮轨接触分析和车辆动力学计算,对优化廓形和退化廓形的性能进行验证,并与标准60N廓形及现场实测的2组打磨廓形进行对比评估。结果表明:在轨距角附近区域(16°~45°),廓形偏差以负偏差为主,主要分布在-0.8~0 mm区间,均值约为-0.4 mm,过量打磨问题较为突出;与标准60N廓形相比,优化钢轨廓形与LMA型车轮匹配时名义等效锥度提升至0.036,轮轨最大接触应力降低14%,动力学性能相当,车体横向振动加速度有所改善;退化廓形与60N廓形的偏差控制在-0.2~+0.2 mm范围内,名义等效锥度为0.034,满足设计约束条件,有效解决了等效锥度过低的问题;与现场实测的2组打磨廓形相比,退化廓形在动力学性能和接触力学性能方面均表现出显著优势,轮对横向振动加速度降低19%,构架横向振动加速度降低7%,车体横向振动加速度降低13%,轮轨法向最大接触应力降低19%~37%,切向最大接触应力降低33%~41%,平均接触应力显著降低且分布更加集中。钢轨廓形优化方法为现场打磨提供了参考依据,对解决动车组低锥度晃车问题具有指导意义。
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, authorsList=安博伦, 张金, 刘丰收, 杨光, 梁旭, 翟明, 陈敏)}, authors=[Author(id=1268884430312600520, tenantId=1146029695717560320, journalId=1268266580820377661, articleId=1268884422154679196, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=abl2022@foxmail.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1268884430371320778, tenantId=1146029695717560320, journalId=1268266580820377661, articleId=1268884422154679196, authorId=1268884430312600520, language=EN, stringName=Bolun AN, firstName=Bolun, middleName=null, lastName=AN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.中国铁道科学研究院集团有限公司 金属及化学研究所,北京100081, bio={"content":"
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| 参数符号 | 60N标准廓形参数/mm | 数值优化搜索范围/mm |
|---|
| | 60.00 | 48.00~90.00 |
| | 200.00 | 160.00~360.00 |
| | 60.00 | 48.00~90.00 |
| | 16.00 | 12.8~24.00 |
| | -6.30 | -7.56~-5.04 |
| | 6.30 | -9.45~-5.04 |
| | 20.41 | 16.32~24.49 |
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廓形特征参数及设定优化搜索范围
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| 参数符号 | 60N标准廓形参数/mm | 数值优化搜索范围/mm |
|---|
| | 60.00 | 48.00~90.00 |
| | 200.00 | 160.00~360.00 |
| | 60.00 | 48.00~90.00 |
| | 16.00 | 12.8~24.00 |
| | -6.30 | -7.56~-5.04 |
| | 6.30 | -9.45~-5.04 |
| | 20.41 | 16.32~24.49 |
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| 廓形 | 横向振动加速度/(m · s-²) |
|---|
| 轮对 | 构架 | 车体 |
|---|
| 60N廓形 | 9.719 | 4.629 | 0.987 |
| 优化廓形 | 9.889 | 4.675 | 0.980 |
| 实测廓形1 | 11.058 | 5.884 | 1.049 |
| 实测廓形2 | 11.305 | 5.874 | 1.078 |
| 退化廓形 | 9.157 | 5.490 | 0.938 |
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不同廓形下车辆动力响应指标结果
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| 廓形 | 横向振动加速度/(m · s-²) |
|---|
| 轮对 | 构架 | 车体 |
|---|
| 60N廓形 | 9.719 | 4.629 | 0.987 |
| 优化廓形 | 9.889 | 4.675 | 0.980 |
| 实测廓形1 | 11.058 | 5.884 | 1.049 |
| 实测廓形2 | 11.305 | 5.874 | 1.078 |
| 退化廓形 | 9.157 | 5.490 | 0.938 |
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