Article(id=1227591812135711371, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1227591806980915649, articleNumber=null, orderNo=null, doi=10.16385/j.cnki.issn.1004-4523.202309026, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1694275200000, receivedDateStr=2023-09-10, revisedDate=1703433600000, revisedDateStr=2023-12-25, acceptedDate=null, acceptedDateStr=null, onlineDate=1770610295566, onlineDateStr=2026-02-09, pubDate=1757433600000, pubDateStr=2025-09-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1770610295566, onlineIssueDateStr=2026-02-09, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1770610295566, creator=13701087609, updateTime=1770610295566, updator=13701087609, issue=Issue{id=1227591806980915649, tenantId=1146029695717560320, journalId=1225147924628267009, year='2025', volume='38', issue='9', pageStart='1935', pageEnd='2204', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1770610294337, creator=13701087609, updateTime=1770610356968, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1227592069754057532, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1227591806980915649, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1227592069754057533, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1227591806980915649, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=2098, endPage=2105, ext={EN=ArticleExt(id=1227591812408341140, articleId=1227591812135711371, tenantId=1146029695717560320, journalId=1225147924628267009, language=EN, title=Vibration characteristics analysis of thermal bending for cantilever rotor-bearing system, columnId=null, journalTitle=Journal of Vibration Engineering, columnName=null, runingTitle=null, highlight=null, articleAbstract=
The wedge-shaped oil film in sliding bearings induces uneven heating effects on the journal of a rapidly rotating rotor, resulting in circumferential temperature variations in the journal. The thermal bending caused by these temperature differences exacerbates rotor vibration, leading to a phenomenon known as ‘Morton effect’ or rotor thermal instability. This effect is particularly severe in cantilevered rotors. Initially, an elliptical bearing’s thermal fluid lubrication model is established, and its dynamic coefficients and oil film temperature field are calculated. Subsequently, based on Fourier heat conduction theory, using the obtained oil film temperature as a boundary condition, a finite element method is employed to solve the three-dimensional transient temperature field of the journal to determine the thermal deformation and thermal stress. The thermal stress is then integrated to obtain an equivalent moment for rotor dynamic analysis. Additionally, the sliding bearing oil film thickness is updated based on thermal deformation. Repeating these steps completes the fluid-solid-thermal multi-field coupling analysis of the rotor-bearing system, and the effectiveness of the simulation model is validated against experimental data. Finally, parameter analysis is conducted on the rotor-bearing system with the rotor’s cantilever length and suspended mass as variables. The results indicate that reducing the cantilever length or decreasing the suspended mass effectively reduces system vibration.
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滑动轴承的楔形油膜对于高速旋转的转子轴颈有不均匀加热效应,使得轴颈产生周向温差。周向温差所导致的热弯曲会加剧转子振动,甚至造成转子热失稳,即所谓“莫顿效应”。对于悬臂式转子,莫顿效应尤其严重。本文建立椭圆轴承的热流体润滑模型并计算其动力系数及油膜温度场,基于傅里叶热传导理论,以所得油膜温度为边界条件,采用有限元方法求解轴颈三维瞬态温度场以获得轴颈热变形与热应力,对过热应力积分获得等效弯矩,并将其应用于转子动力学分析,同时基于热变形更新滑动轴承油膜厚度。重复上述步骤便完成了转子-轴承系统的流-固-热多场耦合分析,基于试验数据验证仿真模型的有效性。以转子悬臂长度及悬垂质量为参数,对转子-轴承系统进行参数分析。结果表明,缩短悬臂长度或减小悬垂质量可有效降低系统振动。
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1.上海交通大学振动、冲击、噪声研究所,上海 200240)]), AuthorCompany(id=1227653067944952224, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, xref=2., ext=[AuthorCompanyExt(id=1227653067949146529, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, companyId=1227653067944952224, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2.上海电气电站设备有限公司发电机厂,上海 200240)])], figs=[ArticleFig(id=1227653072810345152, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 1, caption=
Synchronous whirling analysis of the journal, figureFileSmall=O/eqOldUwPu9AAlrxAt80w==, figureFileBig=+kSE5VEraMstX3S08VXmIw==, tableContent=null), ArticleFig(id=1227653072957145807, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图1, caption=
轴颈同步涡动轨迹分析, figureFileSmall=O/eqOldUwPu9AAlrxAt80w==, figureFileBig=+kSE5VEraMstX3S08VXmIw==, tableContent=null), ArticleFig(id=1227653073208804057, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 2, caption=
The diagram of oil film thickness for elliptical bearing, figureFileSmall=C2K+npxbs5FcLyGVV2Mrog==, figureFileBig=5ppfB4weSGaP9+/zYNHnzg==, tableContent=null), ArticleFig(id=1227653073330438877, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图2, caption=
椭圆轴承油膜厚度示意图, figureFileSmall=C2K+npxbs5FcLyGVV2Mrog==, figureFileBig=5ppfB4weSGaP9+/zYNHnzg==, tableContent=null), ArticleFig(id=1227653073494016744, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 3, caption=
Oil film characteristic distribution of elliptical bearing, figureFileSmall=uzKkUwIqhZWHMnYNvpP/OA==, figureFileBig=WMUgC477sVpJff2uganGEQ==, tableContent=null), ArticleFig(id=1227653073619845875, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图3, caption=
椭圆轴承油膜特性分布, figureFileSmall=uzKkUwIqhZWHMnYNvpP/OA==, figureFileBig=WMUgC477sVpJff2uganGEQ==, tableContent=null), ArticleFig(id=1227653073787618045, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 4, caption=
Inhomogeneous stress distribution and its equivalent bending moment, figureFileSmall=jk12FQBJ4oCtIZa0geiDWQ==, figureFileBig=gzFPTamtMpvKnAn8LrKh8g==, tableContent=null), ArticleFig(id=1227653073942807303, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图4, caption=
不均匀应力分布及其等效弯矩, figureFileSmall=jk12FQBJ4oCtIZa0geiDWQ==, figureFileBig=gzFPTamtMpvKnAn8LrKh8g==, tableContent=null), ArticleFig(id=1227653074056053517, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 5, caption=
The temperature and thermal stress field of journal, figureFileSmall=R6bZD0tHSr3KsrMK4H2WWw==, figureFileBig=ejDrS90Q7OOiHlQxLygbFw==, tableContent=null), ArticleFig(id=1227653074160911124, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图5, caption=
轴颈温度及热应力场, figureFileSmall=R6bZD0tHSr3KsrMK4H2WWw==, figureFileBig=ejDrS90Q7OOiHlQxLygbFw==, tableContent=null), ArticleFig(id=1227653074295128860, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 6, caption=
Variation of equivalent thermal bending moment with time, figureFileSmall=BEjdHEowQnfE/DYK/aN0iQ==, figureFileBig=gWs3ns1czjTMJwKlXt+pGQ==, tableContent=null), ArticleFig(id=1227653074420957988, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图6, caption=
等效热弯矩随时间的变化, figureFileSmall=BEjdHEowQnfE/DYK/aN0iQ==, figureFileBig=gWs3ns1czjTMJwKlXt+pGQ==, tableContent=null), ArticleFig(id=1227653075830244138, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 7, caption=
Schematic diagram of rotor-bearing system model, figureFileSmall=+Tk34sQPWN/IZracR42bng==, figureFileBig=sRO2A7vTGc+XpxMt3JMWvw==, tableContent=null), ArticleFig(id=1227653077793178420, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图7, caption=
转子-轴承系统模型简图, figureFileSmall=+Tk34sQPWN/IZracR42bng==, figureFileBig=sRO2A7vTGc+XpxMt3JMWvw==, tableContent=null), ArticleFig(id=1227653077923201850, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 8, caption=
System simulation flowchart, figureFileSmall=4dCOjCqO01w/ZWjTVDF+tg==, figureFileBig=pAwVSXAs0VEjwdKKTz1Suw==, tableContent=null), ArticleFig(id=1227653078149694275, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图8, caption=
系统仿真流程图, figureFileSmall=4dCOjCqO01w/ZWjTVDF+tg==, figureFileBig=pAwVSXAs0VEjwdKKTz1Suw==, tableContent=null), ArticleFig(id=1227653078292300619, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 9, caption=
The diagram of staggered integration method, figureFileSmall=HjFEVgnLx6eIqDbB5DyL9Q==, figureFileBig=D7Frqem419PwRCrO9d0taQ==, tableContent=null), ArticleFig(id=1227653078430712659, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图9, caption=
交错积分法示意图, figureFileSmall=HjFEVgnLx6eIqDbB5DyL9Q==, figureFileBig=D7Frqem419PwRCrO9d0taQ==, tableContent=null), ArticleFig(id=1227653078564930393, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 10, caption=
System test run & test experiment of critical speed, figureFileSmall=D1UAwvdjKzFi9PMELlEE2A==, figureFileBig=kfFnzbu3L29a/4h3TyP06g==, tableContent=null), ArticleFig(id=1227653078673982303, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图10, caption=
系统试车&临界转速测试试验, figureFileSmall=D1UAwvdjKzFi9PMELlEE2A==, figureFileBig=kfFnzbu3L29a/4h3TyP06g==, tableContent=null), ArticleFig(id=1227653078820782951, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 11, caption=
The diagram of displacement response of measuring point, figureFileSmall=QIsA5Ls2kVsGcNOnS0PMmw==, figureFileBig=cJdCCzh+rRgYg2uN4EjVIg==, tableContent=null), ArticleFig(id=1227653078955000687, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图11, caption=
测点位移响应趋势图, figureFileSmall=QIsA5Ls2kVsGcNOnS0PMmw==, figureFileBig=cJdCCzh+rRgYg2uN4EjVIg==, tableContent=null), ArticleFig(id=1227653080288789364, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 12, caption=
Effects of cantilever length on system vibration, figureFileSmall=X3kdrBHjVO0s13WcAIFvUw==, figureFileBig=9ODaU6XeDxRNFN1RuockNQ==, tableContent=null), ArticleFig(id=1227653080481727360, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图12, caption=
不同悬臂长度对于系统振动的影响, figureFileSmall=X3kdrBHjVO0s13WcAIFvUw==, figureFileBig=9ODaU6XeDxRNFN1RuockNQ==, tableContent=null), ArticleFig(id=1227653080620139408, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Fig. 13, caption=
Effects of suspension mass on system vibration, figureFileSmall=bHVg6K/n7jswBASRryLNYg==, figureFileBig=HzYoeSbxyRtsn/UrECDsgg==, tableContent=null), ArticleFig(id=1227653080741774233, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=图13, caption=
不同悬垂质量对于系统振动的影响, figureFileSmall=bHVg6K/n7jswBASRryLNYg==, figureFileBig=HzYoeSbxyRtsn/UrECDsgg==, tableContent=null), ArticleFig(id=1227653080855020449, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Tab. 1, caption=
Parameters of the elliptical bearing
, figureFileSmall=null, figureFileBig=null, tableContent=
| 轴承参数 | 数值 |
|---|
| 轴承半径/mm | 140 |
| 轴承宽度/mm | 260 |
| 轴承间隙/mm | 0.17 |
| 预负荷 | 0.5 |
| 轴瓦数量 | 2 |
| 瓦块包角/(°) | 140 |
| 进油温度/℃ | 50 |
| 进油压力/MPa | 0.8 |
| 润滑油牌号 | ISO-VG46 |
| 载荷/kN | 1200 |
| 转速/(r·min−1) | 3000 |
), ArticleFig(id=1227653080964072361, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=表1, caption=
椭圆轴承参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 轴承参数 | 数值 |
|---|
| 轴承半径/mm | 140 |
| 轴承宽度/mm | 260 |
| 轴承间隙/mm | 0.17 |
| 预负荷 | 0.5 |
| 轴瓦数量 | 2 |
| 瓦块包角/(°) | 140 |
| 进油温度/℃ | 50 |
| 进油压力/MPa | 0.8 |
| 润滑油牌号 | ISO-VG46 |
| 载荷/kN | 1200 |
| 转速/(r·min−1) | 3000 |
), ArticleFig(id=1227653081085707182, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Tab. 2, caption=
Comparison of operating parameters of elliptical bearings
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | DYROBES | 自编程序 | 试验数据 |
|---|
| 偏心率 | 0.7671 | 0.7671 | 0.7707 |
| 偏位角/(°) | 79.20 | 79.20 | 81.02 |
| 周向温差/℃ | 20.8 | 22.2 | 22.5 |
| 最大油膜压力/MPa | 4.91 | 5.16 | — |
| Kxx/(N·m−1) | 4.01×108 | 3.92×108 | — |
| Kxy/(N·m−1) | 1.93×108 | 2.51×108 | — |
| Kyx/(N·m−1) | −1.25×109 | −1.22×109 | — |
| Kyy/(N·m−1) | 1.67×109 | 1.50×109 | — |
| Cxx/(N·s·m−1) | 1.74×106 | 1.61×106 | — |
| Cxy/(N·s·m−1) | −9.87×105 | −1.17×106 | — |
| Cyx/(N·s·m−1) | −9.87×105 | −1.15×106 | — |
| Cyy/(N·s·m−1) | 8.86×106 | 8.52×106 | — |
), ArticleFig(id=1227653081186370487, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=表2, caption=
椭圆轴承工作参数对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | DYROBES | 自编程序 | 试验数据 |
|---|
| 偏心率 | 0.7671 | 0.7671 | 0.7707 |
| 偏位角/(°) | 79.20 | 79.20 | 81.02 |
| 周向温差/℃ | 20.8 | 22.2 | 22.5 |
| 最大油膜压力/MPa | 4.91 | 5.16 | — |
| Kxx/(N·m−1) | 4.01×108 | 3.92×108 | — |
| Kxy/(N·m−1) | 1.93×108 | 2.51×108 | — |
| Kyx/(N·m−1) | −1.25×109 | −1.22×109 | — |
| Kyy/(N·m−1) | 1.67×109 | 1.50×109 | — |
| Cxx/(N·s·m−1) | 1.74×106 | 1.61×106 | — |
| Cxy/(N·s·m−1) | −9.87×105 | −1.17×106 | — |
| Cyx/(N·s·m−1) | −9.87×105 | −1.15×106 | — |
| Cyy/(N·s·m−1) | 8.86×106 | 8.52×106 | — |
), ArticleFig(id=1227653081270256575, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=EN, label=Tab. 3, caption=
The critical speed of the rotor-bearing system
, figureFileSmall=null, figureFileBig=null, tableContent=
| 阶数 | 仿真 / (r·min−1) | 试验 /(r·min−1) | 误差 /% |
|---|
| 第1阶 | 1364.3 | 1396.9 | 2.389 |
| 第2阶 | 2727.3 | 2749.1 | 0.799 |
), ArticleFig(id=1227653081358336965, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1227591812135711371, language=CN, label=表3, caption=
转子-轴承系统临界转速
, figureFileSmall=null, figureFileBig=null, tableContent=
| 阶数 | 仿真 / (r·min−1) | 试验 /(r·min−1) | 误差 /% |
|---|
| 第1阶 | 1364.3 | 1396.9 | 2.389 |
| 第2阶 | 2727.3 | 2749.1 | 0.799 |
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