Flow-induced vibrations of two elastically mounted circular cylinders in staggered arrangement were experimentally investigated. The Reynolds number range for all experiments (2.5×104<Re<1.2×105) was in the TrSL3 flow regime. The oscillator parameters selected were: mass ratio m* = 1.343, spring stiffness K = 250N/m, and damping ratio ζ = 0.02. The experiments were conducted in the Low Turbulence Free Surface Water (LTFSW) Channel in the MRELab of the University of Michigan. A closed-loop, virtual spring-damper system (Vck) was used to facilitate quick and accurate parameter setting. Based on the characteristics of the displacement response, five vibration patterns were identified and their corresponding regions in the parametric plane of the in-flow spacing (1.57<L/D<4.57) and transverse cylinder-spacing (0<T/D<2) were defined. The hydrodynamic forces and frequency characteristics of the vibration response are discussed as well.
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ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering
June 25–30, 2017
Trondheim, Norway
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5778-6
PROCEEDINGS PAPER
Interactive Flow-Induced Vibrations of Two Staggered, Low Mass-Ratio Cylinders in the TrSL3 Flow Regime (2.5×104<Re<1.2×105): Smooth Cylinders
Chunning Ji,
Chunning Ji
Tianjin University, Tianjin, China
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Hai Sun,
Hai Sun
Harbin Engineering University, Harbin, China
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Michael M. Bernitsas
Michael M. Bernitsas
University of Michigan, Ann Arbor, MI
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Chunning Ji
Tianjin University, Tianjin, China
Wanhai Xu
Tianjin University, Tianjin, China
Hai Sun
Harbin Engineering University, Harbin, China
Michael M. Bernitsas
University of Michigan, Ann Arbor, MI
Paper No:
OMAE2017-62166, V010T09A005; 9 pages
Published Online:
September 25, 2017
Citation
Ji, C, Xu, W, Sun, H, & Bernitsas, MM. "Interactive Flow-Induced Vibrations of Two Staggered, Low Mass-Ratio Cylinders in the TrSL3 Flow Regime (2.5×104<Re<1.2×105): Smooth Cylinders." Proceedings of the ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. Volume 10: Ocean Renewable Energy. Trondheim, Norway. June 25–30, 2017. V010T09A005. ASME. https://doi.org/10.1115/OMAE2017-62166
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