Flow-induced vibration of curved cylinder arrays subject to loose support

• Published in: Nonlinear dynamics Vol. 78; no. 4; pp. 2533 - 2545
• Main Authors: Tang, Min, Ni, Qiao, Luo, Yangyang, Wang, Yikun, Wang, Lin
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.12.2014; Springer Nature B.V
• Subjects: Arrays; Automotive Engineering; Classical Mechanics; Computer simulation; Control; Cross flow; Curved; Cylinders; Dynamical Systems; Engineering; Flow generated vibrations; Fretting; Impact damage; Impact loads; Mathematical models; Mechanical Engineering; Nonlinearity; Original Paper; Stability; Tubes; Vibration; Vibration analysis; Cross-flow; Fluidelastic instability; Curved tube; Loose support
• ISSN: 0924-090X; 1573-269X
• DOI: 10.1007/s11071-014-1608-6

In this paper, an improved model is developed aimed at analyzing the fluidelastic vibration of a single flexible curved tube which is surrounded by rigid cylinders and subjected to cross-flow and loose support. Based on the previous model, the axial extension of the curved tube described by von Karman nonlinearity has been accounted for in the current research. Simulations are performed to explore the effect of quasi-steady fluid force model and velocity-limited friction model on the post-instability behavior. Numerical results show that the out-of-plane response is confined to a limit cycle by the von Karman nonlinearity and the in-plane vibration is induced by the out-of-plane vibration through the nonlinear coupling. When the loose support comes into play, the nonlinear impact forces become dominate. The results are presented; comparisons are made to analyze the parameters influencing the fretting-wear damage, such as normal work rate, contact ratio and impact force level.