Article(id=1228805182524425198, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1228805175335383281, articleNumber=null, orderNo=null, doi=10.16385/j.cnki.issn.1004-4523.2025.04.002, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1690041600000, receivedDateStr=2023-07-23, revisedDate=1696780800000, revisedDateStr=2023-10-09, acceptedDate=null, acceptedDateStr=null, onlineDate=1770899585609, onlineDateStr=2026-02-12, pubDate=1744214400000, pubDateStr=2025-04-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1770899585609, onlineIssueDateStr=2026-02-12, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1770899585609, creator=13701087609, updateTime=1770899585609, updator=13701087609, issue=Issue{id=1228805175335383281, tenantId=1146029695717560320, journalId=1225147924628267009, year='2025', volume='38', issue='4', pageStart='663', pageEnd='888', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1770899583895, creator=13701087609, updateTime=1770901458539, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1228813038325789525, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1228805175335383281, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1228813038329983830, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1228805175335383281, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=677, endPage=686, ext={EN=ArticleExt(id=1228805182776083450, articleId=1228805182524425198, tenantId=1146029695717560320, journalId=1225147924628267009, language=EN, title=Recursive dynamic mode decomposition method for output-only identification of time-varying modal parameters, columnId=null, journalTitle=Journal of Vibration Engineering, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Time-varying modal identification is important to obtain the dynamic characteristics of time-varying engineering structures and realize real-time vibration control and online health monitoring of structural systems. Aiming at the problems of measuring the excitation of engineering structures and low efficiency of time-varying modal identification,an output-only recursive identification method based on dynamic mode decomposition(DMD)is proposed in this paper. To extend the theory of the existing DMD method,this paper draws on the projection approximation subspace tracking algorithm and the sliding-window idea,and proposes a recursive format of the DMD method,which can update the system matrix and the proper orthogonal decomposition basis recursively,and can be further used for the output-only recursive modal identification of time-varying systems. A numerical example of a three-degree-of-freedom structural system with time-varying mass and an experimental setup of a liquid-filled cylindrical structural system with variable mass are respectively designed and built to validate the proposed method numerically and experimentally. The results demonstrate that the proposed recursive DMD method is able to accurately identify the modal parameters of the time-varying structures by only using the measured vibration response data,and has good output-only recursive identification capability.
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针对工程结构的激励难以测量、时变模态辨识计算效率低下的问题,提出了一种基于动态模式分解(DMD)的时变模态仅输出递推辨识方法。借鉴投影近似子空间跟踪算法和滑动窗思想对现有DMD方法进行理论拓展,提出DMD方法的递推格式,能够对系统矩阵和本征正交分解基进行递推更新,可用于时变模态的仅输出递推辨识。设计时变质量三自由度结构系统数值算例,搭建变质量充液筒结构系统实验平台,分别对所提递推DMD方法进行数值和实验验证。结果表明,所提递推DMD方法能够仅基于结构系统的振动响应数据准确辨识得到其时变模态,具备良好的仅输出递推辨识能力。
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1.School of Mechanical Engineering,Tianjin University,Tianjin 300350,China
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172:105420., articleTitle=Operational modal analysis of a liquid-filled cylindrical structure with decreasing filling mass by multivariate stochastic parameter evolution methods, refAbstract=null)], funds=[Fund(id=1229121426222018987, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, awardId=12272258, language=CN, fundingSource=国家自然科学基金资助项目(12272258), fundOrder=null, country=null), Fund(id=1229121426276544941, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, awardId=11802201, language=CN, fundingSource=国家自然科学基金资助项目(11802201), fundOrder=null, country=null), Fund(id=1229121426347848111, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, awardId=ZH2022001, language=CN, fundingSource=战略火箭创新基金资助项目(ZH2022001), fundOrder=null, country=null), Fund(id=1229121426431734191, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, awardId=TJSQNTJ-2020-01, language=CN, fundingSource=天津市青年人才托举工程(TJSQNTJ-2020-01), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1229121420807172330, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, xref=1., ext=[AuthorCompanyExt(id=1229121420823949547, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, companyId=1229121420807172330, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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The flowchart of recursive DMD method, figureFileSmall=zRozRGAijot2Hb66gDomnw==, figureFileBig=lWCY1+JMFHrr9Qlr+oo70Q==, tableContent=null), ArticleFig(id=1229121423386669396, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图1, caption=
递推DMD方法的流程图, figureFileSmall=zRozRGAijot2Hb66gDomnw==, figureFileBig=lWCY1+JMFHrr9Qlr+oo70Q==, tableContent=null), ArticleFig(id=1229121423516692824, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 2, caption=
Schematic diagram of the 3-DOF structural system, figureFileSmall=7vLRoGr2hFLBqLKTSy90IQ==, figureFileBig=jjJMfa5cKwF/IXvrlb7AXQ==, tableContent=null), ArticleFig(id=1229121423625744733, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图2, caption=
三自由度结构系统示意图, figureFileSmall=7vLRoGr2hFLBqLKTSy90IQ==, figureFileBig=jjJMfa5cKwF/IXvrlb7AXQ==, tableContent=null), ArticleFig(id=1229121423722213730, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 3, caption=
Displacement response of the 3-DOF structural system, figureFileSmall=kC6yFK42jxJUvkFsPNJY6Q==, figureFileBig=jNnTBr0JtSzYeg4xW6mVxw==, tableContent=null), ArticleFig(id=1229121423843848552, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图3, caption=
三自由度结构系统的位移响应, figureFileSmall=kC6yFK42jxJUvkFsPNJY6Q==, figureFileBig=jNnTBr0JtSzYeg4xW6mVxw==, tableContent=null), ArticleFig(id=1229121423927734639, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 4, caption=
Estimated natural frequencies of the 3-DOF structural system(WL=0. 2 s), figureFileSmall=YwX5i+WNkY9cMTzNKFpwUQ==, figureFileBig=/80mxGAa2iZs58pRZOfN0g==, tableContent=null), ArticleFig(id=1229121424020009329, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图4, caption=
三自由度结构系统的固有频率辨识结果(WL=0.2 s), figureFileSmall=YwX5i+WNkY9cMTzNKFpwUQ==, figureFileBig=/80mxGAa2iZs58pRZOfN0g==, tableContent=null), ArticleFig(id=1229121424108089716, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 5, caption=
Estimated natural frequencies of the 3-DOF structural system(WL=0. 1 s), figureFileSmall=4d5JtVXb9R1b5X6C69Xyig==, figureFileBig=9XZkN0ce6R7py9H9j0FMjA==, tableContent=null), ArticleFig(id=1229121424196170104, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图5, caption=
三自由度结构系统的固有频率辨识结果(WL=0.1 s), figureFileSmall=4d5JtVXb9R1b5X6C69Xyig==, figureFileBig=9XZkN0ce6R7py9H9j0FMjA==, tableContent=null), ArticleFig(id=1229121424275861883, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 6, caption=
Estimated natural frequencies of the 3-DOF structural system(WL=1 s), figureFileSmall=yAvAir6Xxwc9lwTeum+LCg==, figureFileBig=st/r1kBVnOH/4B20ueCMQg==, tableContent=null), ArticleFig(id=1229121424368136575, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图6, caption=
三自由度结构系统的固有频率辨识结果(WL=1 s), figureFileSmall=yAvAir6Xxwc9lwTeum+LCg==, figureFileBig=st/r1kBVnOH/4B20ueCMQg==, tableContent=null), ArticleFig(id=1229121424468799874, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 7, caption=
Estimated natural frequencies considering the noise effects(WL=0. 2 s), figureFileSmall=tqWBoxfywiTl7vsHaHXy+Q==, figureFileBig=35P0iOURXySDmLYsphLx0A==, tableContent=null), ArticleFig(id=1229121424565268870, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图7, caption=
考虑噪声影响的固有频率辨识结果(WL=0.2 s), figureFileSmall=tqWBoxfywiTl7vsHaHXy+Q==, figureFileBig=35P0iOURXySDmLYsphLx0A==, tableContent=null), ArticleFig(id=1229121424724652427, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 8, caption=
Estimated natural frequencies considering the noise effects(WL=1 s), figureFileSmall=WnCRWkx9Sw4yQRNG00X4iQ==, figureFileBig=cXNMlePDTWq1jfJNu8t+Zg==, tableContent=null), ArticleFig(id=1229121424821121424, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图8, caption=
考虑噪声影响的固有频率辨识结果(WL=1 s), figureFileSmall=WnCRWkx9Sw4yQRNG00X4iQ==, figureFileBig=cXNMlePDTWq1jfJNu8t+Zg==, tableContent=null), ArticleFig(id=1229121424930173329, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 9, caption=
Experimental system, figureFileSmall=9Zi9N2xXPWKhI8S/dCklQw==, figureFileBig=o8nt/mCXTNF0HqS85cbY3Q==, tableContent=null), ArticleFig(id=1229121425043419539, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图9, caption=
实验系统, figureFileSmall=9Zi9N2xXPWKhI8S/dCklQw==, figureFileBig=o8nt/mCXTNF0HqS85cbY3Q==, tableContent=null), ArticleFig(id=1229121425135694227, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 10, caption=
The varying liquid level of the experimental system, figureFileSmall=fWXb7C6XfYdCjcLbyZXYoQ==, figureFileBig=ID2wHAg3N3EctIdoZzdX/A==, tableContent=null), ArticleFig(id=1229121425198608789, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图10, caption=
实验系统的液位变化规律, figureFileSmall=fWXb7C6XfYdCjcLbyZXYoQ==, figureFileBig=ID2wHAg3N3EctIdoZzdX/A==, tableContent=null), ArticleFig(id=1229121425261523351, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 11, caption=
Estimated natural frequencies of the experimental system(WL=10 s), figureFileSmall=hWt8GJJlASFh/KvXpF8a0Q==, figureFileBig=R/ZxD5MQpkvP3Q8yh7u/mw==, tableContent=null), ArticleFig(id=1229121425345409434, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图11, caption=
实验系统的固有频率辨识结果(WL=10 s), figureFileSmall=hWt8GJJlASFh/KvXpF8a0Q==, figureFileBig=R/ZxD5MQpkvP3Q8yh7u/mw==, tableContent=null), ArticleFig(id=1229121425454461341, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 12, caption=
Estimated natural frequencies of the experimental system(WL=3 s), figureFileSmall=/foPEstCL+xt7M/t1VaImQ==, figureFileBig=3dgGh4CyIwhbRrp3NZmaJQ==, tableContent=null), ArticleFig(id=1229121425563513248, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图12, caption=
实验系统的固有频率辨识结果(WL=3 s), figureFileSmall=/foPEstCL+xt7M/t1VaImQ==, figureFileBig=3dgGh4CyIwhbRrp3NZmaJQ==, tableContent=null), ArticleFig(id=1229121425659982240, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Fig. 13, caption=
The estimated first order natural frequency of the experimental system(WL=10 s), figureFileSmall=SWFNJ4BlhY9fNXh2LzOnow==, figureFileBig=smBUqmLd2Q3MZvhVBScUNQ==, tableContent=null), ArticleFig(id=1229121425731285409, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=图13, caption=
实验系统的第一阶固有频率辨识结果(WL=10 s), figureFileSmall=SWFNJ4BlhY9fNXh2LzOnow==, figureFileBig=smBUqmLd2Q3MZvhVBScUNQ==, tableContent=null), ArticleFig(id=1229121425815171491, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Tab. 1, caption=
Comparison of the MAE for estimated natural frequencies with different sliding window lengths
, figureFileSmall=null, figureFileBig=null, tableContent=
| 滑动窗长度/s | 一阶频率/Hz | 二阶频率/Hz | 三阶频率/Hz |
|---|
| 0.1 | 0.035 | 0.055 | 0.100 |
| 0.2 | 0.029 | 0.051 | 0.072 |
| 1.0 | 0.101 | 0.178 | 0.158 |
), ArticleFig(id=1229121425886474661, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=表1, caption=
不同滑动窗长度下固有频率辨识结果的MAE指标对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 滑动窗长度/s | 一阶频率/Hz | 二阶频率/Hz | 三阶频率/Hz |
|---|
| 0.1 | 0.035 | 0.055 | 0.100 |
| 0.2 | 0.029 | 0.051 | 0.072 |
| 1.0 | 0.101 | 0.178 | 0.158 |
), ArticleFig(id=1229121425966166439, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=EN, label=Tab. 2, caption=
Comparison of the MAE for estimated natural frequencies with different sliding window lengths by considering the noise effects
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| 滑动窗长度/s | 一阶频率/Hz | 二阶频率/Hz | 三阶频率/Hz |
|---|
| 0.2 | 0.255 | 0.235 | 0.569 |
| 1.0 | 0.145 | 0.221 | 0.548 |
), ArticleFig(id=1229121426062635432, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228805182524425198, language=CN, label=表2, caption=
考虑噪声影响的不同滑动窗长度下固有频率辨识结果的MAE指标对比
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| 滑动窗长度/s | 一阶频率/Hz | 二阶频率/Hz | 三阶频率/Hz |
|---|
| 0.2 | 0.255 | 0.235 | 0.569 |
| 1.0 | 0.145 | 0.221 | 0.548 |
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