刚柔混合输流管的流致振动稳定性研究
O321; 弹性管和刚性管串联而成的混合输流管是典型的刚柔耦合系统.基于Hamilton原理,建立了刚柔混合输流管的动力学模型,利用悬臂梁的模态函数对方程进行Galerkin离散,分析了混合管的流致振动稳定性问题,讨论了两管连接处转动弹簧的刚度、刚性管与弹性管的质量比和长度比对系统临界流速的影响.结果表明,刚性管长度比的增加能显著降低混合管的临界流速,并且主要发生 2 阶模态失稳.当刚度和质量比取某些值时,随着内流流速的增加,混合管可能出现"失稳(2 阶模态)-稳定-再失稳(3 阶模态)"的变化过程.此外,随着弹性管质量比的增加,还观察到了混合管由 2 阶模态过渡到 4 阶...
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| Published in | 机械强度 Vol. 45; no. 3; pp. 548 - 554 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
深圳信息职业技术学院 智能制造与装备学院, 深圳 518172%友铂空天动力 (深圳) 有限公司, 深圳 518172%湖北文理学院 机械工程学院, 襄阳 441053
2023
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-9669 |
| DOI | 10.16579/j.issn.1001.9669.2023.03.006 |
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| Abstract | O321; 弹性管和刚性管串联而成的混合输流管是典型的刚柔耦合系统.基于Hamilton原理,建立了刚柔混合输流管的动力学模型,利用悬臂梁的模态函数对方程进行Galerkin离散,分析了混合管的流致振动稳定性问题,讨论了两管连接处转动弹簧的刚度、刚性管与弹性管的质量比和长度比对系统临界流速的影响.结果表明,刚性管长度比的增加能显著降低混合管的临界流速,并且主要发生 2 阶模态失稳.当刚度和质量比取某些值时,随着内流流速的增加,混合管可能出现"失稳(2 阶模态)-稳定-再失稳(3 阶模态)"的变化过程.此外,随着弹性管质量比的增加,还观察到了混合管由 2 阶模态过渡到 4 阶模态的失稳模式. |
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| AbstractList | O321; 弹性管和刚性管串联而成的混合输流管是典型的刚柔耦合系统.基于Hamilton原理,建立了刚柔混合输流管的动力学模型,利用悬臂梁的模态函数对方程进行Galerkin离散,分析了混合管的流致振动稳定性问题,讨论了两管连接处转动弹簧的刚度、刚性管与弹性管的质量比和长度比对系统临界流速的影响.结果表明,刚性管长度比的增加能显著降低混合管的临界流速,并且主要发生 2 阶模态失稳.当刚度和质量比取某些值时,随着内流流速的增加,混合管可能出现"失稳(2 阶模态)-稳定-再失稳(3 阶模态)"的变化过程.此外,随着弹性管质量比的增加,还观察到了混合管由 2 阶模态过渡到 4 阶模态的失稳模式. |
| Author | 吕建行 刘明俊 张振久 杨显清 李月安 |
| AuthorAffiliation | 深圳信息职业技术学院 智能制造与装备学院, 深圳 518172%友铂空天动力 (深圳) 有限公司, 深圳 518172%湖北文理学院 机械工程学院, 襄阳 441053 |
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| Author_FL | LIU MingJun LI YueAn YANG XianQing Lü JianXing ZHANG ZhenJiu |
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| Keywords | 失稳 流致振动 临界流速 特征值 刚柔混合输流管 |
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| Title | 刚柔混合输流管的流致振动稳定性研究 |
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