Article(id=1190338915698577548, tenantId=1146029695717560320, journalId=1190235702286704641, issueId=1190338910774464639, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1737302400000, receivedDateStr=2025-01-20, revisedDate=1740672000000, revisedDateStr=2025-02-28, acceptedDate=null, acceptedDateStr=null, onlineDate=1761728512930, onlineDateStr=2025-10-29, pubDate=1752508800000, pubDateStr=2025-07-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1761728512930, onlineIssueDateStr=2025-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1761728512930, creator=13701087609, updateTime=1761728512930, updator=13701087609, issue=Issue{id=1190338910774464639, tenantId=1146029695717560320, journalId=1190235702286704641, year='2025', volume='26', issue='7', pageStart='1', pageEnd='84', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1761728511756, creator=13701087609, updateTime=1761807981473, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1190672230997705207, tenantId=1146029695717560320, journalId=1190235702286704641, issueId=1190338910774464639, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1190672230997705208, tenantId=1146029695717560320, journalId=1190235702286704641, issueId=1190338910774464639, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=32, endPage=39, ext={EN=ArticleExt(id=1190338915967013007, articleId=1190338915698577548, tenantId=1146029695717560320, journalId=1190235702286704641, language=EN, title=Pre-stress modal analysis of shaft system torsional vibration for a large steam turbine generator set, columnId=1190338913429459072, journalTitle=Electrical Engineering, columnName=Research & Development, runingTitle=null, highlight=null, articleAbstract=
Modal analysis is the basis for studying the torsional vibration characteristics of the generator set shaft system. Current researches mainly focus on modal analysis under conventional shaft system constraints or the characteristic analysis of key parts of the shaft system under certain operating conditions. However, there is insufficient research on the impact of actual operating conditions on the modal characteristics of the shaft system. Taking the shaft system of a 600 MW steam turbine generator set as the research object, firstly, a three-dimensional model of the shaft system is established using the family table parameterization function of Creo modeling software. Then, theoretical analysis and finite element simulation are performed on the conventional natural modes, rotational speed pre-stress modes, thermal pre-stress modes, and modes under the combined effect of rotational speed and thermal pre-stress. The simulation results show that when rotational speed or thermal pre-stress acts separately, the natural frequencies of the shaft system decrease. When both rotational speed and thermal pre-stress act together, the natural frequencies of the shaft system are lower than those under no pre-stress conditions. However, under the premise that the rotational speed is at the nominal operating speed, a phenomenon is observed where the natural frequencies increase gradually with the rise in temperature, compared with the case where only temperature pre-stress is applied. This provides a reference for the design of the shaft system considering actual operating conditions.
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模态分析是研究大型汽轮发电机组轴系扭振特性的基础,当前研究主要集中于轴系常规约束下的模态分析或轴系关键部位在某些实际工况下的特性分析,关于实际运行条件对机组轴系模态特性影响的研究不足。本文以某600 MW汽轮发电机组轴系为研究对象,首先,使用Creo建模软件的族表参数化功能建立轴系三维模型;然后,对机组轴系进行常规固有模态、转速预应力模态、温度预应力模态、转速和温度预应力共同作用下模态的理论分析和有限元仿真。仿真结果表明,转速和温度预应力单独作用时,轴系固有频率随转速或温度预应力的增大而降低;转速和温度预应力共同作用时,轴系的固有频率低于无预应力下的固有频率,与仅有温度预应力作用的情况相比,在工频转速和温度耦合作用的情况下,系统的固有频率随温度升高呈现出增大的趋势。研究结果可为考虑实际工况的轴系设计提供参考。
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杨俊杰(1999—),男,硕士研究生,研究方向为大型汽轮发电机组的扭振特性仿真分析。
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杨俊杰(1999—),男,硕士研究生,研究方向为大型汽轮发电机组的扭振特性仿真分析。
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| 类型 | 结构名称 | d1/mm | d0/mm |
| 父项轴 | SHIXINZHOU | 74.00 | 70.00 |
| 子项轴 | SHIXINZHOU-INST1 | 57.50 | 75.00 |
| 子项轴 | SHIXINZHOU-INST2 | 67.50 | 184.00 |
| 子项轴 | SHIXINZHOU-INST3 | 90.00 | 45.00 |
| 子项轴 | SHIXINZHOU-INST4 | 120.00 | 75.00 |
| 子项轴 | SHIXINZHOU-INST5 | 84.00 | 45.00 |
| | | | |
| 子项轴 | SHIXINZHOU-INST175 | 437.50 | 590.00 |
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实心轴族表
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| 类型 | 结构名称 | d1/mm | d0/mm |
| 父项轴 | SHIXINZHOU | 74.00 | 70.00 |
| 子项轴 | SHIXINZHOU-INST1 | 57.50 | 75.00 |
| 子项轴 | SHIXINZHOU-INST2 | 67.50 | 184.00 |
| 子项轴 | SHIXINZHOU-INST3 | 90.00 | 45.00 |
| 子项轴 | SHIXINZHOU-INST4 | 120.00 | 75.00 |
| 子项轴 | SHIXINZHOU-INST5 | 84.00 | 45.00 |
| | | | |
| 子项轴 | SHIXINZHOU-INST175 | 437.50 | 590.00 |
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| 转速/(r/min) | 一阶/Hz | 二阶/Hz | 三阶/Hz |
| 0 | 17.81 | 34.01 | 40.89 |
| 2 800 | 17.25 | 32.79 | 39.39 |
| 2 900 | 17.21 | 32.76 | 39.37 |
| 3 000 | 17.17 | 32.72 | 39.34 |
| 3 100 | 17.10 | 32.66 | 39.29 |
| 3 200 | 17.07 | 32.64 | 39.27 |
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不同转速下的模态频率
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| 转速/(r/min) | 一阶/Hz | 二阶/Hz | 三阶/Hz |
| 0 | 17.81 | 34.01 | 40.89 |
| 2 800 | 17.25 | 32.79 | 39.39 |
| 2 900 | 17.21 | 32.76 | 39.37 |
| 3 000 | 17.17 | 32.72 | 39.34 |
| 3 100 | 17.10 | 32.66 | 39.29 |
| 3 200 | 17.07 | 32.64 | 39.27 |
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| 温度/℃ | 一阶/Hz | 二阶/Hz | 三阶/Hz |
| 22 | 17.81 | 34.01 | 40.89 |
| 100 | 17.42 | 33.65 | 40.53 |
| 200 | 16.78 | 33.01 | 39.78 |
| 300 | 15.89 | 31.88 | 38.44 |
| 400 | 14.91 | 30.55 | 36.87 |
| 500 | 14.01 | 29.37 | 35.49 |
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不同温度下的模态频率
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| 温度/℃ | 一阶/Hz | 二阶/Hz | 三阶/Hz |
| 22 | 17.81 | 34.01 | 40.89 |
| 100 | 17.42 | 33.65 | 40.53 |
| 200 | 16.78 | 33.01 | 39.78 |
| 300 | 15.89 | 31.88 | 38.44 |
| 400 | 14.91 | 30.55 | 36.87 |
| 500 | 14.01 | 29.37 | 35.49 |
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| 转速/(r/min) | 温度/℃ | 一阶/Hz | 二阶/Hz | 三阶/Hz |
| 0 | 22 | 17.81 | 34.01 | 40.89 |
| 3 000 | 22 | 17.17 | 32.72 | 39.34 |
| 100 | 17.06 | 32.53 | 39.12 |
| 200 | 16.88 | 32.18 | 38.76 |
| 300 | 16.46 | 31.42 | 37.91 |
| 400 | 15.92 | 30.44 | 36.83 |
| 500 | 15.45 | 29.58 | 35.87 |
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额定转速时不同温度下的模态频率
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| 转速/(r/min) | 温度/℃ | 一阶/Hz | 二阶/Hz | 三阶/Hz |
| 0 | 22 | 17.81 | 34.01 | 40.89 |
| 3 000 | 22 | 17.17 | 32.72 | 39.34 |
| 100 | 17.06 | 32.53 | 39.12 |
| 200 | 16.88 | 32.18 | 38.76 |
| 300 | 16.46 | 31.42 | 37.91 |
| 400 | 15.92 | 30.44 | 36.83 |
| 500 | 15.45 | 29.58 | 35.87 |
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| 阶次 | 转速/ (r/min) | 温度/℃ | 临界转速/ (r/min) | 固有 频率/Hz |
| 一阶模态 | 0 | 22 | 1 068.6 | 17.81 |
| 3 000 | 22 | 1 030.2 | 17.17 |
| 0 | 300 | 953.4 | 15.89 |
| 3 000 | 300 | 987.6 | 16.46 |
| 二阶模态 | 0 | 22 | 2 040.6 | 34.01 |
| 3 000 | 22 | 1 963.2 | 32.72 |
| 0 | 300 | 1 912.8 | 31.88 |
| 3 000 | 300 | 1 885.2 | 31.42 |
| 三阶模态 | 0 | 22 | 2 453.4 | 40.89 |
| 3 000 | 22 | 2 360.4 | 39.34 |
| 0 | 300 | 2 306.4 | 38.44 |
| 3 000 | 300 | 2 274.6 | 37.91 |
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不同工况下的临界转速和固有频率
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| 阶次 | 转速/ (r/min) | 温度/℃ | 临界转速/ (r/min) | 固有 频率/Hz |
| 一阶模态 | 0 | 22 | 1 068.6 | 17.81 |
| 3 000 | 22 | 1 030.2 | 17.17 |
| 0 | 300 | 953.4 | 15.89 |
| 3 000 | 300 | 987.6 | 16.46 |
| 二阶模态 | 0 | 22 | 2 040.6 | 34.01 |
| 3 000 | 22 | 1 963.2 | 32.72 |
| 0 | 300 | 1 912.8 | 31.88 |
| 3 000 | 300 | 1 885.2 | 31.42 |
| 三阶模态 | 0 | 22 | 2 453.4 | 40.89 |
| 3 000 | 22 | 2 360.4 | 39.34 |
| 0 | 300 | 2 306.4 | 38.44 |
| 3 000 | 300 | 2 274.6 | 37.91 |
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