Article(id=1268884469994909903, tenantId=1146029695717560320, journalId=1268266580820377661, issueId=1268884383122494171, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1001-4632.2026.02.07, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1763481600000, receivedDateStr=2025-11-19, revisedDate=1769270400000, revisedDateStr=2026-01-25, acceptedDate=null, acceptedDateStr=null, onlineDate=1780455232379, onlineDateStr=2026-06-03, pubDate=1772294400000, pubDateStr=2026-03-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1780455232379, onlineIssueDateStr=2026-06-03, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1780455232379, creator=13701087609, updateTime=1780455232379, 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=76, endPage=86, ext={EN=ArticleExt(id=1268884470208819409, articleId=1268884469994909903, tenantId=1146029695717560320, journalId=1268266580820377661, language=EN, title=Study on Random Characteristics of Vehicle-Bridge Dynamic Response for 400 km · h
-1 High-Speed Railway, columnId=null, journalTitle=China Railway Science, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Given the significant randomness of vehicle-bridge dynamic response for higher-speed railways, this study aims to explore the characteristics and probability distribution of dynamic response of a 400 km · h-1 train passing through a bridge. A vehicle-bridge coupled random vibration model is established based on the pseudo-excitation method and the whole-process iteration method, and its validity is confirmed through comparison with the simulation results of Monte Carlo method. Based on this model, the time-frequency distribution laws of safety and stability indices of the train running at 400 km · h-1 are analyzed, and the random characteristics of vehicle-bridge dynamic response under higher speeds on simply-supported beams with different fundamental frequencies are studied. The results show that the statistical values of vehicle-bridge response vary with time, showing typical non-stationary characteristics. The dynamic coefficient of the bridge is mainly controlled by the arrangement of train axle and the wheelbase, and is only slightly affected by the random excitation of track irregularity. Under resonance conditions of simply supported beam, the wheel load reduction rate increases significantly with the increase of speed, and the carbody vibration acceleration is insensitive to the resonance response of the simply supported beam. The fundamental frequency of the simply-supported beam has minor effect on the wheel load reduction rate and carbody vibration acceleration, whereas the randomness of the track irregularities has a significant effect on the vertical vibration acceleration and the wheel load reduction rate of the bridge.
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由于更高速度铁路车桥动力响应具有显著的随机性,因此为探明时速400 km列车过桥动力响应的特点及概率分布特征,基于虚拟激励法与全过程迭代法建立车桥耦合随机振动模型,并与蒙特卡洛法仿真结果进行对比验证。基于此,分析时速400 km下列车运行安全性与平稳性指标的时频分布规律,并研究不同基频简支梁在更高速度列车作用下的车桥动力响应随机特征。结果表明:车桥响应的功率谱及标准差随时间变化而变化,呈现典型的非平稳特征;桥梁动力系数主要受列车轴式、轴距控制,受不平顺随机激励的影响很小;简支梁共振条件下轮重减载率随速度增大而显著增大,车体振动加速度对简支梁共振响应不敏感;简支梁基频对列车轮重减载率和车体振动加速度影响较小,但轨道不平顺的随机性对桥梁竖向振动加速度与轮重减载率的影响显著。
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蔡超勋(1982—),男,湖南益阳人,研究员,博士。E-mail:tagerocai@163.com
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2.Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing100081, China
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| 符号 | 含义 |
|---|
| k1 | 一系悬挂竖向刚度 |
| c1 | 一系悬挂竖向阻尼 |
| m0 | 轮对质量 |
| d1 | 转向架中心到轮对的纵向距离(同一个转向架下,前轮对为+,后轮对为-) |
| | 竖向轨道不平顺引起的虚拟激励 |
| | 自由度s引起的竖向虚拟激励(s=z1,z2,z3,φ1) |
| KF | 关于竖向虚拟激励的附加刚度矩阵 |
| CF | 关于竖向虚拟激励的附加阻尼矩阵 |
| XF | 关于竖向虚拟激励的位移向量 |
| TF | 关于竖向虚拟激励的不平顺指标向量 |
| | 自由度s引起的惯性虚拟激励(s=z2,z3) |
| XP | 关于惯性虚拟激励的位移向量 |
| TP | 关于惯性虚拟激励的不平顺指标向量 |
), ArticleFig(id=1268884480094794017, tenantId=1146029695717560320, journalId=1268266580820377661, articleId=1268884469994909903, language=CN, label=表1, caption=
符号含义
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| 符号 | 含义 |
|---|
| k1 | 一系悬挂竖向刚度 |
| c1 | 一系悬挂竖向阻尼 |
| m0 | 轮对质量 |
| d1 | 转向架中心到轮对的纵向距离(同一个转向架下,前轮对为+,后轮对为-) |
| | 竖向轨道不平顺引起的虚拟激励 |
| | 自由度s引起的竖向虚拟激励(s=z1,z2,z3,φ1) |
| KF | 关于竖向虚拟激励的附加刚度矩阵 |
| CF | 关于竖向虚拟激励的附加阻尼矩阵 |
| XF | 关于竖向虚拟激励的位移向量 |
| TF | 关于竖向虚拟激励的不平顺指标向量 |
| | 自由度s引起的惯性虚拟激励(s=z2,z3) |
| XP | 关于惯性虚拟激励的位移向量 |
| TP | 关于惯性虚拟激励的不平顺指标向量 |
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| 区间 | A | k |
|---|
| 第1段 | 1.054 4×10-5 | 3.389 1 |
| 第2段 | 3.558 8×10-3 | 1.921 7 |
| 第3段 | 1.978 4×10-2 | 1.364 3 |
| 第4段 | 3.948 8×10-4 | 3.451 6 |
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不同区段轨道不平顺表达式系数
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| 区间 | A | k |
|---|
| 第1段 | 1.054 4×10-5 | 3.389 1 |
| 第2段 | 3.558 8×10-3 | 1.921 7 |
| 第3段 | 1.978 4×10-2 | 1.364 3 |
| 第4段 | 3.948 8×10-4 | 3.451 6 |
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