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Dynamic characteristics of a hydraulic curved pipe subjected to random vibration
International Journal of Fatigue ( IF 6 ) Pub Date : 2021-06-18 , DOI: 10.1016/j.ijfatigue.2021.106359
Carl Fischer , Christoph Schweizer

In this paper, the effects of external random excitation on the dynamic characteristics of a hydraulic curved pipe are investigated. A random vibration motion equation of a curved pipe conveying fluid is determined using Hamilton’s principle, in which the fluid-structure interaction (FSI) and the effect of shear deformation are taken into account. The finite element method (FEM) and discrete analysis method of random vibration (DAMRV) are employed to solve these equations. Then, the dynamic characteristics of a curved pipe with different vibration and fluid parameters under two types of supported modes are determined. The numerical results show that the dynamic characteristics of the curved pipe have significant influenced by different parameters. Moreover, the numerical and experimental results are found to have good consistency, which demonstrates that the proposed method can provide theoretical reference and technical support for the design and selection of curved pipes subjected to random vibration.



中文翻译:

随机振动作用下液压弯管的动力学特性

本文研究了外部随机激励对液压弯管动态特性的影响。利用汉密尔顿原理确定了弯管输送流体的随机振动运动方程,其中考虑了流固耦合(FSI)和剪切变形的影响。使用有限元法(FEM)和随机振动离散分析法(DAMRV)来求解这些方程。然后,确定了具有不同振动和流体参数的弯管在两种支撑模式下的动态特性。数值结果表明,弯管的动力特性受不同参数的影响显着。此外,发现数值和实验结果具有良好的一致性,

更新日期:2021-06-18
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