Article(id=1228653352955867413, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1228653350485422347, articleNumber=null, orderNo=null, doi=10.16385/j.cnki.issn.1004-4523.2024.10.007, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1710345600000, receivedDateStr=2024-03-14, revisedDate=1712505600000, revisedDateStr=2024-04-08, acceptedDate=null, acceptedDateStr=null, onlineDate=1770863386619, onlineDateStr=2026-02-12, pubDate=1730044800000, pubDateStr=2024-10-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1770863386619, onlineIssueDateStr=2026-02-12, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1770863386619, creator=13701087609, updateTime=1770863386619, updator=13701087609, issue=Issue{id=1228653350485422347, tenantId=1146029695717560320, journalId=1225147924628267009, year='2024', volume='37', issue='10', pageStart='1625', pageEnd='1802', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1770863386031, creator=13701087609, updateTime=1770863862999, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1228655351092936954, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1228653350485422347, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1228655351092936955, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1228653350485422347, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1698, endPage=1706, ext={EN=ArticleExt(id=1228653354994299181, articleId=1228653352955867413, tenantId=1146029695717560320, journalId=1225147924628267009, language=EN, title=Local connection stiffness identification for nonlinear structural systems, columnId=null, journalTitle=Journal of Vibration Engineering, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Jointed structures are widely used in engineering applications,and local nonlinear characteristics at the connection interface have an important influence on their dynamic modeling and characteristic prediction. Aiming at the problem that local connection parameters of nonlinear structural systems are unknown or difficult to measure,this paper proposes an identification method of local linear connection stiffness based on the FRF transformation from the perspective of inverse dynamic problems. By further combining with the time-domain nonlinear subspace identification method,the local linear and nonlinear connection stiffness of nonlinear structural systems can be finally obtained. The numerical example and experimental setup of the three degrees-of-freedom structural system are designed and further built to validate the proposed method. The results demonstrate that the proposed method can separate and identify the underlying linear FRF and nonlinear parameters of the nonlinear structural system,and subsequently realize the joint identification of the local linear and nonlinear connection stiffness.
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连接结构在工程应用领域广泛存在,连接位置处的局部非线性特征对结构系统的动力学建模与特性预示具有重要影响。针对非线性结构系统局部连接参数未知或难以测量的问题,本文从结构动力学反问题的角度出发,提出一种基于频响函数变换的局部线性连接刚度辨识方法,通过与时域非线性子空间辨识方法相结合,可进一步获取非线性结构系统的局部线性和非线性连接刚度。设计并搭建三自由度结构系统的数值算例和实验系统,开展辨识方法的数值和实验验证,结果表明,所提方法能够分离并辨识得到非线性结构系统的标称线性系统频响函数和非线性参数,进而实现局部线性和非线性连接刚度的联合辨识。
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, authorsList=任彦松, 马志赛, 李亚南, 于佳晖, 张忠, 丁千)}, authors=[Author(id=1228653379849744597, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=renystju@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1228653379946213598, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, authorId=1228653379849744597, language=EN, stringName=Yan-song REN, firstName=Yan-song, middleName=null, lastName=REN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1School of Mechanical Engineering, Tianjin University, Tianjin 300350, China
2Tianjin Key Laboratory of Nonlinear Dynamics and Control, Tianjin 300350, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1228653380025905378, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, authorId=1228653379849744597, language=CN, stringName=任彦松, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1天津大学机械工程学院,天津 300350
2天津市非线性动力学与控制重点实验室,天津 300350, bio={"content":"
任彦松(1999—),男,硕士研究生。E-mail: renystju@163.com。
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任彦松(1999—),男,硕士研究生。E-mail: renystju@163.com。
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1School of Mechanical Engineering, Tianjin University, Tianjin 300350, China
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1天津大学机械工程学院,天津 300350
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3Beijing Institute of Structure and Environment Engineering, Beijing 100076, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1228653380550193405, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, authorId=1228653380340478197, language=CN, stringName=李亚南, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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3北京强度环境研究所,北京 100076, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1228653379761664204, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, xref=3, ext=[AuthorCompanyExt(id=1228653379770052814, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, companyId=1228653379761664204, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3Beijing Institute of Structure and Environment Engineering, Beijing 100076, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1228653381108035861, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, authorId=1228653380898320653, language=CN, stringName=张忠, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1School of Mechanical Engineering, Tianjin University, Tianjin 300350, China
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1天津大学机械工程学院,天津 300350
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Identification flowchart of the local connection stiffness of structural systems, figureFileSmall=QNcSRGgZQ212aaakil1sJQ==, figureFileBig=tklU+h6MXFoj2NmY4FqBEg==, tableContent=null), ArticleFig(id=1228653382307606862, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图1, caption=
结构系统局部连接刚度的辨识流程, figureFileSmall=QNcSRGgZQ212aaakil1sJQ==, figureFileBig=tklU+h6MXFoj2NmY4FqBEg==, tableContent=null), ArticleFig(id=1228653382521516378, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.2, caption=
Three degrees-of-freedom linear structural system, figureFileSmall=RF0MH4z2ifpCbVsXmlrYag==, figureFileBig=wFp33pyxlzbniShuo7m9eg==, tableContent=null), ArticleFig(id=1228653382601208158, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图2, caption=
三自由度线性结构系统, figureFileSmall=RF0MH4z2ifpCbVsXmlrYag==, figureFileBig=wFp33pyxlzbniShuo7m9eg==, tableContent=null), ArticleFig(id=1228653382672511330, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.3, caption=
Identification results of the FRF of the linear structural system, figureFileSmall=JtjJ3KTCXRnKWZuHGgMZWA==, figureFileBig=VuoZy8z0jDYlvsF+6w/J7Q==, tableContent=null), ArticleFig(id=1228653382748008806, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图3, caption=
线性结构系统频响函数的辨识结果, figureFileSmall=JtjJ3KTCXRnKWZuHGgMZWA==, figureFileBig=VuoZy8z0jDYlvsF+6w/J7Q==, tableContent=null), ArticleFig(id=1228653382840283498, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.4, caption=
The sum of real parts of the column elements in the inverse matrix of the FRF, figureFileSmall=25b31NSxzXHOKfX13Hv9eg==, figureFileBig=l4Eglgz+BRAch2xumEldVA==, tableContent=null), ArticleFig(id=1228653382924169582, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图4, caption=
频响函数逆矩阵列元素实部的求和曲线, figureFileSmall=25b31NSxzXHOKfX13Hv9eg==, figureFileBig=l4Eglgz+BRAch2xumEldVA==, tableContent=null), ArticleFig(id=1228653383003861361, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.5, caption=
Three degrees-of-freedom structural system with clearance nonlinearity, figureFileSmall=E4hY62DavtizXNNt536Npg==, figureFileBig=6iNM6QTrafYcv4arsrYFXA==, tableContent=null), ArticleFig(id=1228653383100330358, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图5, caption=
三自由度间隙非线性结构系统, figureFileSmall=E4hY62DavtizXNNt536Npg==, figureFileBig=6iNM6QTrafYcv4arsrYFXA==, tableContent=null), ArticleFig(id=1228653383175827834, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.6, caption=
Description function of the clearance nonlinearity, figureFileSmall=4MasCJVzqLTLkUwu/0AsfA==, figureFileBig=e5p/QDb9yNHhkj43jArR3Q==, tableContent=null), ArticleFig(id=1228653383255519613, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图6, caption=
间隙非线性的描述函数, figureFileSmall=4MasCJVzqLTLkUwu/0AsfA==, figureFileBig=e5p/QDb9yNHhkj43jArR3Q==, tableContent=null), ArticleFig(id=1228653383339405697, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.7, caption=
Identification results of the underlying linear FRF, figureFileSmall=TxkV5dtYR+H6/bT6uM6NhQ==, figureFileBig=XCDLVWW0+bF8h1/OKPeN1Q==, tableContent=null), ArticleFig(id=1228653383435874693, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图7, caption=
标称线性系统频响函数的辨识结果, figureFileSmall=TxkV5dtYR+H6/bT6uM6NhQ==, figureFileBig=XCDLVWW0+bF8h1/OKPeN1Q==, tableContent=null), ArticleFig(id=1228653383519760777, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.8, caption=
Identification results of the clearance nonlinear stiffness, figureFileSmall=jEij7N6XeAux6gYaSY0igw==, figureFileBig=mHBiuhzfZdlxmihQIa7gKw==, tableContent=null), ArticleFig(id=1228653383582675341, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图8, caption=
间隙非线性刚度的辨识结果, figureFileSmall=jEij7N6XeAux6gYaSY0igw==, figureFileBig=mHBiuhzfZdlxmihQIa7gKw==, tableContent=null), ArticleFig(id=1228653383662367121, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.9, caption=
Identification results of the linear connection stiffness based on the underlying linear FRF, figureFileSmall=uWW44Uf01HRiYEGDd5BsoA==, figureFileBig=H+JxL/rK0XaLsOjTIjK2+g==, tableContent=null), ArticleFig(id=1228653383716893077, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图9, caption=
基于标称线性系统频响函数的线性连接刚度辨识, figureFileSmall=uWW44Uf01HRiYEGDd5BsoA==, figureFileBig=H+JxL/rK0XaLsOjTIjK2+g==, tableContent=null), ArticleFig(id=1228653383809167771, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.10, caption=
Schematic diagram of the experimental system, figureFileSmall=kH/yvHmG72ZdoLeSp7D8Mw==, figureFileBig=w2m9WOhvBgL9GFeebWsGuQ==, tableContent=null), ArticleFig(id=1228653383884665247, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图10, caption=
实验系统的原理图, figureFileSmall=kH/yvHmG72ZdoLeSp7D8Mw==, figureFileBig=w2m9WOhvBgL9GFeebWsGuQ==, tableContent=null), ArticleFig(id=1228653383955968419, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.11, caption=
Photo of the experimental system, figureFileSmall=NPKjIpxG3Y6X3DtYlm5RSg==, figureFileBig=oh+ME349ok3Hk398xSxriQ==, tableContent=null), ArticleFig(id=1228653384023077287, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图11, caption=
实验系统的装置图, figureFileSmall=NPKjIpxG3Y6X3DtYlm5RSg==, figureFileBig=oh+ME349ok3Hk398xSxriQ==, tableContent=null), ArticleFig(id=1228653384119546284, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.12, caption=
Input-output data of the linear experimental system, figureFileSmall=iPalL/RDRnF1Tt/k2tLYQw==, figureFileBig=xNQYOE6PTQQ2BK++0SkzUA==, tableContent=null), ArticleFig(id=1228653384203432369, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图12, caption=
线性实验系统的输入-输出数据, figureFileSmall=iPalL/RDRnF1Tt/k2tLYQw==, figureFileBig=xNQYOE6PTQQ2BK++0SkzUA==, tableContent=null), ArticleFig(id=1228653384283124147, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.13, caption=
Identification results of the FRF of the linear experimental system, figureFileSmall=PYBSMucShx6f0t+RTRVJKg==, figureFileBig=BUL6sZlZm/26wt/TCsGF+Q==, tableContent=null), ArticleFig(id=1228653384509616571, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图13, caption=
线性实验系统频响函数的辨识结果, figureFileSmall=PYBSMucShx6f0t+RTRVJKg==, figureFileBig=BUL6sZlZm/26wt/TCsGF+Q==, tableContent=null), ArticleFig(id=1228653384576725438, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.14, caption=
Identification results when the connection stiffness is
and 
, figureFileSmall=mnX+y4DTwIBkMQrBlUdENg==, figureFileBig=qr6AmMwtl1bjZKDCkQzmqg==, tableContent=null), ArticleFig(id=1228653384660611522, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图14, caption=
连接刚度为
和
时的辨识结果, figureFileSmall=mnX+y4DTwIBkMQrBlUdENg==, figureFileBig=qr6AmMwtl1bjZKDCkQzmqg==, tableContent=null), ArticleFig(id=1228653384799023557, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.15, caption=
Identification results of the connection stiffness between m3 and the fixed foundation, figureFileSmall=jarmUaFkACRMWdvlXqn+fg==, figureFileBig=dhYFN+8NQfU/LLHitnKGkg==, tableContent=null), ArticleFig(id=1228653384870326729, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图15, caption=
基础固定端与m3之间的连接刚度辨识结果, figureFileSmall=jarmUaFkACRMWdvlXqn+fg==, figureFileBig=dhYFN+8NQfU/LLHitnKGkg==, tableContent=null), ArticleFig(id=1228653384962601420, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.16, caption=
Input-output data of the nonlinear experimental system, figureFileSmall=mzjLtK6Yvitf37EvgWKM0Q==, figureFileBig=JUZLeb850+OWYGno8/i0eQ==, tableContent=null), ArticleFig(id=1228653385029710287, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图16, caption=
非线性实验系统的输入-输出数据, figureFileSmall=mzjLtK6Yvitf37EvgWKM0Q==, figureFileBig=JUZLeb850+OWYGno8/i0eQ==, tableContent=null), ArticleFig(id=1228653385126179283, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.17, caption=
Distribution of the nonlinear restoring force in [0.314 mm,0.319 mm], figureFileSmall=Vd2da9m+UxpV2W1F/btfFA==, figureFileBig=mj4Pw0ZwO1aYVOMOJZFx+A==, tableContent=null), ArticleFig(id=1228653385205871062, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图17, caption=
区间[0.314 mm,0.319 mm]内的非线性恢复力分布, figureFileSmall=Vd2da9m+UxpV2W1F/btfFA==, figureFileBig=mj4Pw0ZwO1aYVOMOJZFx+A==, tableContent=null), ArticleFig(id=1228653385289757146, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.18, caption=
Identification results of the underlying linear FRF of the nonlinear experimental system, figureFileSmall=8CYSY6Lk4V3I6tAcDoj6zQ==, figureFileBig=ef2eUC2gr7OUgiCpo61jYw==, tableContent=null), ArticleFig(id=1228653385377837534, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图18, caption=
非线性实验系统的标称线性频响函数辨识结果, figureFileSmall=8CYSY6Lk4V3I6tAcDoj6zQ==, figureFileBig=ef2eUC2gr7OUgiCpo61jYw==, tableContent=null), ArticleFig(id=1228653385453335009, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.19, caption=
Identification results of the nonlinear connection stiffness of the nonlinear experimental system, figureFileSmall=9KeEbsKEJaeLYNc+5UzCCA==, figureFileBig=/zKu9dgrxj+BPFwfj0pCwA==, tableContent=null), ArticleFig(id=1228653385549804004, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图19, caption=
非线性实验系统的非线性连接刚度辨识结果, figureFileSmall=9KeEbsKEJaeLYNc+5UzCCA==, figureFileBig=/zKu9dgrxj+BPFwfj0pCwA==, tableContent=null), ArticleFig(id=1228653385684021736, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Fig.20, caption=
Identification results of the linear connection stiffness of the nonlinear experimental system, figureFileSmall=fp2fMTjlo4jA5IgneJvNjg==, figureFileBig=WSwqC8DzrWhuhwVDGYMRTw==, tableContent=null), ArticleFig(id=1228653385759519211, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=图20, caption=
非线性实验系统的线性连接刚度辨识结果, figureFileSmall=fp2fMTjlo4jA5IgneJvNjg==, figureFileBig=WSwqC8DzrWhuhwVDGYMRTw==, tableContent=null), ArticleFig(id=1228653385839210988, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Tab.1, caption=
The fitting results of curves when the connection stiffness 
, figureFileSmall=null, figureFileBig=null, tableContent=
| 常数项理论值/(N⋅m-1) | 常数项拟合值/(N⋅m-1) | 常数项偏差/% | 二次项理论值 | 二次项拟合值 | 二次项偏差/% |
|---|
| 第一列 | 0 | -427.25 | ― | -51.32 | -52.32 | 1.94 |
| 第二列 | 4×104 | 3.93×104 | 1.75 | -51.32 | -51.18 | 0.27 |
| 第三列 | 2×104 | 2.03×104 | 1.50 | -51.32 | -51.48 | 0.31 |
), ArticleFig(id=1228653385914708464, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=表1, caption=
连接刚度为
时的曲线拟合结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 常数项理论值/(N⋅m-1) | 常数项拟合值/(N⋅m-1) | 常数项偏差/% | 二次项理论值 | 二次项拟合值 | 二次项偏差/% |
|---|
| 第一列 | 0 | -427.25 | ― | -51.32 | -52.32 | 1.94 |
| 第二列 | 4×104 | 3.93×104 | 1.75 | -51.32 | -51.18 | 0.27 |
| 第三列 | 2×104 | 2.03×104 | 1.50 | -51.32 | -51.48 | 0.31 |
), ArticleFig(id=1228653385998594546, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=EN, label=Tab.2, caption=
The fitting results of curves with different connection stiffnesses
, figureFileSmall=null, figureFileBig=null, tableContent=
| 连接刚度/(N⋅m-1) | 常数项理论值/(N⋅m-1) | 常数项拟合值/(N⋅m-1) | 常数项偏差/% | 二次项理论值 | 二次项拟合值 | 二次项偏差/% |
|---|
 | 4×104 | 3.93×104 | 1.75 | -51.32 | -50.18 | 0.27 |
 | 4×105 | 3.99×105 | 0.25 | -51.32 | -51.34 | 0.04 |
 | 4×106 | 4.03×106 | 0.75 | -51.32 | -51.39 | 0.14 |
), ArticleFig(id=1228653386103452149, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228653352955867413, language=CN, label=表2, caption=
不同连接刚度下的曲线拟合结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 连接刚度/(N⋅m-1) | 常数项理论值/(N⋅m-1) | 常数项拟合值/(N⋅m-1) | 常数项偏差/% | 二次项理论值 | 二次项拟合值 | 二次项偏差/% |
|---|
 | 4×104 | 3.93×104 | 1.75 | -51.32 | -50.18 | 0.27 |
 | 4×105 | 3.99×105 | 0.25 | -51.32 | -51.34 | 0.04 |
 | 4×106 | 4.03×106 | 0.75 | -51.32 | -51.39 | 0.14 |
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