Article(id=1227627710059573625, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1227627707664630277, articleNumber=null, orderNo=null, doi=10.16385/j.cnki.issn.1004-4523.2024.06.002, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1661616000000, receivedDateStr=2022-08-28, revisedDate=1665936000000, revisedDateStr=2022-10-17, acceptedDate=null, acceptedDateStr=null, onlineDate=1770618854298, onlineDateStr=2026-02-09, pubDate=1719504000000, pubDateStr=2024-06-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1770618854298, onlineIssueDateStr=2026-02-09, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1770618854298, creator=13701087609, updateTime=1770618854298, updator=13701087609, issue=Issue{id=1227627707664630277, tenantId=1146029695717560320, journalId=1225147924628267009, year='2024', volume='37', issue='6', pageStart='903', pageEnd='1088', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1770618853726, creator=13701087609, updateTime=1770795304861, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1228367797449851747, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1227627707664630277, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1228367797449851748, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1227627707664630277, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=915, endPage=927, ext={EN=ArticleExt(id=1227627710223151482, articleId=1227627710059573625, tenantId=1146029695717560320, journalId=1225147924628267009, language=EN, title=Twin data-driven design reliability analysis of random vibration system for main bearing of a large mine hoist, columnId=null, journalTitle=Journal of Vibration Engineering, columnName=null, runingTitle=null, highlight=null, articleAbstract=
In the design phase of a mine hoist’s main bearing,the reliability analysis of its random vibration cannot obtain complete probability information of the vibration acceleration response due to insufficient experimental samples. This paper proposes a new technical route for the reliability analysis of the main bearing of a mine hoist under incomplete probability information. This route includes the dynamic model of a multi-scale coupling system for rolling element bearings,the probability density evolution of vibration acceleration,stochastic process modeling of the probability density evolution path,the probability distribution of vibration power spectral density,and the calculation of design reliability based on conditional probability. By using the collected condition data to drive the established dynamic model of multi-scale coupling system for rolling element bearings,the probability density evolution of vibration acceleration is carried out. Based on the probability density evolution and Karhunen-Loève expansion,a modeling approach for the non-stationary random process of vibration acceleration of rolling element bearings is proposed. This approach obtains the twin data of the random sequence of vibration acceleration for rolling element bearings. The probability distribution of the vibration power spectral density for the main bearing of a mine hoist is studied,and the reliability index of the main bearing of a mine hoist within the service time is calculated.
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设计阶段的大型矿井提升机主轴承随机振动系统的设计可靠性分析因试验样本不足,无法获取振动加速度响应的完备概率信息。提出了概率信息不完备下大型矿井提升机主轴承设计可靠性分析的技术路线:滚动轴承多尺度耦合系统动力学模型-振动加速度概率密度演化-概率密度演化路径随机过程建模-振动功率谱密度的概率分布-基于条件概率的设计可靠度计算。运用已采集的工况数据驱动建立滚动轴承多尺度耦合系统动力学模型,开展了振动加速度概率密度演化研究;基于概率密度演化和Karhunen-Loève展开,提出了滚动轴承振动加速度的非平稳随机过程建模方法,获得了滚动轴承振动加速度随机序列的孪生数据;研究了大型矿井提升机主轴承振动加速度功率谱密度的概率分布,并计算了大型矿井提升机主轴承在服役时间上的设计可靠度指标。
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1School of Mechanical & Electrical Engineering,China University of Mining and Technology,Xuzhou 221008,China
2Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment,China University of Mining and Technology,Xuzhou 221008,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1227671385376490242, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, authorId=1227671383979787006, language=CN, stringName=曹爽, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1中国矿业大学机电工程学院,江苏徐州 221008
2中国矿业大学江苏省矿山机电装备高校重点实验室,江苏徐州 221008, bio={"content":"
曹爽(1993—),男,博士研究生。 E-mail: caoshuangyc@163.com。
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曹爽(1993—),男,博士研究生。 E-mail: caoshuangyc@163.com。
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2中国矿业大学江苏省矿山机电装备高校重点实验室,江苏徐州 221008)])]), Author(id=1227671385456182020, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, orderNo=1, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=haolucumt@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1227671385556845319, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, authorId=1227671385456182020, language=EN, stringName=Hao LU, firstName=Hao, middleName=null, lastName=LU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1School of Mechanical & Electrical Engineering,China University of Mining and Technology,Xuzhou 221008,China
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1中国矿业大学机电工程学院,江苏徐州 221008
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1中国矿业大学机电工程学院,江苏徐州 221008)]), AuthorCompany(id=1227671383803626231, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, xref=2, ext=[AuthorCompanyExt(id=1227671383812014840, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, companyId=1227671383803626231, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2中国矿业大学江苏省矿山机电装备高校重点实验室,江苏徐州 221008)])]), Author(id=1227671385829475082, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, orderNo=2, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1227671385921749773, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, authorId=1227671385829475082, language=EN, stringName=Zhen-cai ZHU, firstName=Zhen-cai, middleName=null, lastName=ZHU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1School of Mechanical & Electrical Engineering,China University of Mining and Technology,Xuzhou 221008,China
2Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment,China University of Mining and Technology,Xuzhou 221008,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1227671386005635854, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, authorId=1227671385829475082, language=CN, stringName=朱真才, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1中国矿业大学机电工程学院,江苏徐州 221008
2中国矿业大学江苏省矿山机电装备高校重点实验室,江苏徐州 221008, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1227671383711351540, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, xref=1, ext=[AuthorCompanyExt(id=1227671383719740149, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, companyId=1227671383711351540, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3School of Mechanical and Power Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1227671386211156755, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, authorId=1227671386068550416, language=CN, stringName=张义民, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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3沈阳化工大学机械与动力工程学院,辽宁沈阳 110142, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1227671383874929402, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, xref=3, ext=[AuthorCompanyExt(id=1227671383883318011, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, companyId=1227671383874929402, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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3沈阳化工大学机械与动力工程学院,辽宁沈阳 110142)])])], keywords=[Keyword(id=1227671386341180180, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, orderNo=1, keyword=random vibration), Keyword(id=1227671386395706133, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, orderNo=2, keyword=design reliability analysis), Keyword(id=1227671386458620694, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, orderNo=3, keyword=twin data), Keyword(id=1227671386521535255, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, orderNo=4, keyword=main bearing of a large mine hoist), Keyword(id=1227671386592838424, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, orderNo=5, keyword=incomplete probability information), Keyword(id=1227671386659947289, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, orderNo=1, keyword=随机振动), Keyword(id=1227671386731250458, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, orderNo=2, keyword=设计可靠性分析), Keyword(id=1227671386794165019, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, orderNo=3, keyword=孪生数据), Keyword(id=1227671386865468188, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, orderNo=4, keyword=大型矿井提升机主轴承), Keyword(id=1227671386924188445, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, orderNo=5, keyword=概率信息不完备)], refs=[Reference(id=1227671390912971583, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, doi=null, pmid=null, pmcid=null, year=2020, volume=56, issue=21, pageStart=110, pageEnd=120, url=null, language=null, rfNumber=[1], rfOrder=0, authorNames=胡爱军, 许莎, 向玲, journalName=机械工程学报, refType=null, unstructuredReference=胡爱军, 许莎, 向玲, 等. 滚动轴承外圈多点故障特征分析[J].
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Technical route of twin data-driven design reliability analysis of random vibration system for main bearing of a large mine hoist, figureFileSmall=RwaAf72gKCPHtP6URkUTpQ==, figureFileBig=Nk8jFiAAOc3JQT0DfGOtqQ==, tableContent=null), ArticleFig(id=1227671387171652383, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图1, caption=
孪生数据驱动的大型矿井提升机主轴承随机振动系统的设计可靠性分析技术路线, figureFileSmall=RwaAf72gKCPHtP6URkUTpQ==, figureFileBig=Nk8jFiAAOc3JQT0DfGOtqQ==, tableContent=null), ArticleFig(id=1227671387255538464, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.2, caption=
Dynamic model of main bearing for a mine hoist, figureFileSmall=6DMA1ZTcZwZ9M2osVxXYBw==, figureFileBig=L7SjW13VoWy4XY9MpREoBg==, tableContent=null), ArticleFig(id=1227671387331035937, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图2, caption=
矿井提升机主轴承动力学模型, figureFileSmall=6DMA1ZTcZwZ9M2osVxXYBw==, figureFileBig=L7SjW13VoWy4XY9MpREoBg==, tableContent=null), ArticleFig(id=1227671387477836578, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.3, caption=
Contact area of rolling element subjected to the force, figureFileSmall=GorGbEJhaC2oW2DHoOyZhQ==, figureFileBig=2GqyiC7ju1XB/p1a3/Db6A==, tableContent=null), ArticleFig(id=1227671387536556835, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图3, caption=
滚动体受力后的接触面积, figureFileSmall=GorGbEJhaC2oW2DHoOyZhQ==, figureFileBig=2GqyiC7ju1XB/p1a3/Db6A==, tableContent=null), ArticleFig(id=1227671387603665700, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.4, caption=
Vibration acceleration of multi-scale coupling system of rolling element bearing, figureFileSmall=pEcRTJVQ2MnxH/yoy+JyvA==, figureFileBig=1Y2eY5SdFQNthiUVdDDzRQ==, tableContent=null), ArticleFig(id=1227671387670774565, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图4, caption=
滚动轴承多尺度耦合系统的振动加速度, figureFileSmall=pEcRTJVQ2MnxH/yoy+JyvA==, figureFileBig=1Y2eY5SdFQNthiUVdDDzRQ==, tableContent=null), ArticleFig(id=1227671387733689126, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.5, caption=
Assigned probabilities of representative points calculated based on Voronoi region, figureFileSmall=BSCndF4ZEA17yD0MJWI5ag==, figureFileBig=U9SEKdmcRFcxoyQjx6opkA==, tableContent=null), ArticleFig(id=1227671387813380903, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图5, caption=
利用Voronoi区域计算代表点的赋得概率, figureFileSmall=BSCndF4ZEA17yD0MJWI5ag==, figureFileBig=U9SEKdmcRFcxoyQjx6opkA==, tableContent=null), ArticleFig(id=1227671387880489768, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.6, caption=
Accuracy of selection strategy of GF discrepancy representative points based on linear moment, figureFileSmall=jfRe6iDc9CaRKW4Y218hJw==, figureFileBig=FdegxEqNM+UEJfgSnXlVhQ==, tableContent=null), ArticleFig(id=1227671387989541673, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图6, caption=
基于线性矩的GF偏差代表点选取策略的精度, figureFileSmall=jfRe6iDc9CaRKW4Y218hJw==, figureFileBig=FdegxEqNM+UEJfgSnXlVhQ==, tableContent=null), ArticleFig(id=1227671388052456234, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.7, caption=
Probability density evolution of vibration acceleration within 2.5~2.6 s time-history, figureFileSmall=p03p2f4bZUTGW7k2KKqYKA==, figureFileBig=Nc6WyfG4vlQmvSUKIuh3eg==, tableContent=null), ArticleFig(id=1227671388119565099, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图7, caption=
2.5~2.6 s时间历程的振动加速度概率密度演化, figureFileSmall=p03p2f4bZUTGW7k2KKqYKA==, figureFileBig=Nc6WyfG4vlQmvSUKIuh3eg==, tableContent=null), ArticleFig(id=1227671388182479660, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.8, caption=
Eigenfunctions and eigenvalues of spectral decomposition for 
, figureFileSmall=fVNGBJw2kOhWPEGxZmSqhg==, figureFileBig=5Pidkkqj2B05ZGa3qTJ4HA==, tableContent=null), ArticleFig(id=1227671388253782829, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图8, caption=
谱分解的特征函数和特征值, figureFileSmall=fVNGBJw2kOhWPEGxZmSqhg==, figureFileBig=5Pidkkqj2B05ZGa3qTJ4HA==, tableContent=null), ArticleFig(id=1227671388320891694, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.9, caption=
and its Karhunen-Loève approximation, figureFileSmall=ccHD9prCgl8IpXuBOWJp7A==, figureFileBig=q8D81dUNSrnPD18BEoWTeQ==, tableContent=null), ArticleFig(id=1227671388388000559, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图9, caption=
和它的Karhunen-Loève近似, figureFileSmall=ccHD9prCgl8IpXuBOWJp7A==, figureFileBig=q8D81dUNSrnPD18BEoWTeQ==, tableContent=null), ArticleFig(id=1227671388450915120, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.10, caption=
106 random sequences of vibration acceleration generated by probability density evolution, figureFileSmall=KUvrDTWQ0z4LU2E0RoFsrA==, figureFileBig=b8se2oNiSBRNIT1OUSkfUA==, tableContent=null), ArticleFig(id=1227671388518023985, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图10, caption=
由概率密度演化产生的106个振动加速度随机序列, figureFileSmall=KUvrDTWQ0z4LU2E0RoFsrA==, figureFileBig=b8se2oNiSBRNIT1OUSkfUA==, tableContent=null), ArticleFig(id=1227671389851812658, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.11, caption=
Probability density function for power spectral density of vibration acceleration, figureFileSmall=RuorZh3PELtmcv0R6bqKGA==, figureFileBig=J5Jg0uWDaJPGHbILfeGJiA==, tableContent=null), ArticleFig(id=1227671389918921523, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图11, caption=
振动加速度功率谱密度的概率密度函数, figureFileSmall=RuorZh3PELtmcv0R6bqKGA==, figureFileBig=J5Jg0uWDaJPGHbILfeGJiA==, tableContent=null), ArticleFig(id=1227671389981836084, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.12, caption=
Probability density function of fault frequency for outer ring of main bearing, figureFileSmall=EpqdnRSGKdgFsGQcfgnxwQ==, figureFileBig=Q0F6YTwr1TGMdqlRaTYfqg==, tableContent=null), ArticleFig(id=1227671390057333557, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图12, caption=
主轴承外圈故障频率的概率密度函数, figureFileSmall=EpqdnRSGKdgFsGQcfgnxwQ==, figureFileBig=Q0F6YTwr1TGMdqlRaTYfqg==, tableContent=null), ArticleFig(id=1227671390120248118, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Fig.B1, caption=
Probability density evolution of vibration acceleration of main bearing during full service time, figureFileSmall=p6+kmrD8xPWoi3lKkl5+yw==, figureFileBig=86UdYq9AyAVEz5cSh8/+Ww==, tableContent=null), ArticleFig(id=1227671390187356983, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=图B1, caption=
全服役时间历程主轴承振动加速度概率密度演化, figureFileSmall=p6+kmrD8xPWoi3lKkl5+yw==, figureFileBig=86UdYq9AyAVEz5cSh8/+Ww==, tableContent=null), ArticleFig(id=1227671390254465848, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Tab.1, caption=
Main parameters of dynamic model for multi-scale coupling system of rolling element bearing
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 | 单位 |
|---|
, , | 8.7,49.5,3.79 | kg |
, , | 1379,2210,9424 | Ns/m |
, , | , , | N/m |
 | 3591.211 | N |
 | 9866.773 | N |
, | 0.718,0.053 | m |
| w | 400 | r/min |
 | 12 | - |
 |  | rad |
 |  | m |
 |  | N/m |
| kv |  | mm2/N |
 |  | mm |
), ArticleFig(id=1227671390338351929, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=表1, caption=
滚动轴承多尺度耦合系统动力学模型主要参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 | 单位 |
|---|
, , | 8.7,49.5,3.79 | kg |
, , | 1379,2210,9424 | Ns/m |
, , | , , | N/m |
 | 3591.211 | N |
 | 9866.773 | N |
, | 0.718,0.053 | m |
| w | 400 | r/min |
 | 12 | - |
 |  | rad |
 |  | m |
 |  | N/m |
| kv |  | mm2/N |
 |  | mm |
), ArticleFig(id=1227671390413849402, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=EN, label=Tab. 2, caption=
Probabilistic characteristics of random variables
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 符号 | 均值 | 标准差 | 概率分布 |
|---|
 |  | 3.79 | 0.25 | 截断型正态分布 |
 |  | 9424 | 40 | 对数正态分布 |
 |  |  | 800 | 对数正态分布 |
 |  | 0.718 | 0.005 | 截断型正态分布 |
 |  | 0.053 | 0.005 | 截断型正态分布 |
 |  |  |  | 正态分布 |
 |  | 3591.211 | 26 | 对数正态分布 |
 |  | 9866.773 | 34 | 对数正态分布 |
 | k |  |  | 对数正态分布 |
 |  |  |  | 均匀分布 |
), ArticleFig(id=1227671390493541179, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227627710059573625, language=CN, label=表2, caption=
随机变量的概率特征
, figureFileSmall=null, figureFileBig=null, tableContent=
| 变量 | 符号 | 均值 | 标准差 | 概率分布 |
|---|
 |  | 3.79 | 0.25 | 截断型正态分布 |
 |  | 9424 | 40 | 对数正态分布 |
 |  |  | 800 | 对数正态分布 |
 |  | 0.718 | 0.005 | 截断型正态分布 |
 |  | 0.053 | 0.005 | 截断型正态分布 |
 |  |  |  | 正态分布 |
 |  | 3591.211 | 26 | 对数正态分布 |
 |  | 9866.773 | 34 | 对数正态分布 |
 | k |  |  | 对数正态分布 |
 |  |  |  | 均匀分布 |
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