Abstract
The flow-induced vibration of square cylinders under flow is known to be caused by two distinct mechanisms of interaction: vortex-induced vibrations and galloping. In the present paper we address the issue of the apparent suppression of galloping when the mass ratio between the solid and the fluid is low enough. By using a reduced-order model that we validate on pre-existing results, we show that galloping is actually not suppressed, but delayed to higher values of the flow velocity. This is explained using a linear stability analysis where the competition between unstable modes is related to the transition between vortex-induced vibration and galloping. Direct numerical simulations coupled with a moving square cylinder confirm that galloping can be found even at very low mass ratios.
Funder
National Natural Science Foundation of China
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Reference41 articles.
1. Some considerations of combined effects of galloping and vortex resonance
2. Frequency lock-in is caused by coupled-mode flutter
3. Mannini, C. , Massai, T. , Marra, A.M. & Bartoli, G. 2015 Modelling the interaction of VIV and galloping for rectangular cylinders. In The 14th International Conference on Wind Engineering, pp. 1–20. Porto Alegre, Brazil.
4. Nonlinear modeling of combined galloping and vortex-induced vibration of square sections under flow
5. Vibration of tube bundles in two-phase cross-flow: part 1—hydrodynamic mass and damping;Pettigrew;Trans. ASME: J. Pressure Vessel Technol.,1989
Cited by
13 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献