Coupled Vibration of Liquid-filled Pipe and Support Structure System
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摘要: 充液管道与其支撑结构之间的耦合,使系统的振动分析复杂化。基于有限元方法,将充液管道和支撑结构分别建模,再通过管道与支撑的固结点将两个系统耦合,推导得到耦合系统的运动方程,分析充液管道与支撑系统的耦合振动特性。分析结果表明:固液耦合作用使管道与液体模态频率减小,同时,耦合效应对系统的高阶振型影响明显;支撑结构与充液管系存在较强的耦合振动模态,在工程应用中应避免此类振动的发生。Abstract: The interaction between the fluid-filled pipes and its support structure bring about complexity in its vibration analysis. Based on the finite element method,the liquid-filled pipe and its supporting structure are modeled separately and then the two models are combined together using the condition of the same displacement for their common nodes. Based on the coupled equation,the vibration characteristics of the liquid-filled pipe and the supporting structure system are analyzed. The results show that,due to the fluid-structure interaction effect,the modal frequencies of the system are reduced obviously and the higher order modal shapes are influenced evidently. The strong coupling vibration modes exist in the support structure and liquid-filled pipe system.
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Key words:
- calculations /
- dynamic response /
- finite element method /
- mathematical models
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[1] 张智勇,沈荣瀛,王强. 充液管道系统的模态分析[J].固体力学学报,2000,(02):143-149. [2] 李宝辉,高行山,刘永寿. 变截面输液管道流固耦合振动特性研究[J].机械科学与技术,2011,(12):2056-2060. [3] 郑继周,程林,杜文静. 充液弹性管束流固耦合系统模态分析[J].山东大学学报(工学版),2007,(04):1-5. [4] Zhao J,Zhang N,Ji J C. Fluid induced vibration in liquid-filled pipe guided hydraulic circuit system[A].Perth,Australia,2010.189-196. [5] 黄益民,刘伟,刘永寿. 充液管道模态的参数灵敏度及其共振可靠性分析[J].振动与中击,2010,(01):193-195,246. [6] 阴豪,李威,李振斌. 多跨充液管道的振动特性分析[J].中国舰船研究,2008,(05):37-40,61. [7] 杨柯. 充液管道流固耦合对称方程的振型分解法[J].温州大学学报(自然科学版),2007,(01):49-54. [8] 金长明,王赣城,高康. 充液管道的传递矩阵法分析[J].噪声与振动控制,2009,(06):30-33. [9] 王勖成. 有限单元法[M].北京:清华大学出版社,2008.
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