INTERACTIVE FLOW-INDUCED VIBRATIONS OF TWO STAGGERED, LOW MASS RATIO CYLINDERS IN THE TRSL3 FLOW REGIME (2.5X104<RE<1.2X105): SMOOTH CYLINDERS

被引：0
作者：
Ji, Chunning [1 ,2 ]
Xu, Wanhai [1 ,2 ]
Sun, Hai [1 ,3 ]
Bernitsas, Michael M. [1 ,4 ,5 ]
机构：
[1] Univ Michigan, Marine Renewable Energy Lab, Ann Arbor, MI 48109 USA
[2] Tianjin Univ, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300072, Peoples R China
[3] Harbin Engn Univ, Harbin 150001, Heilongjiang, Peoples R China
[4] CTO Vortex Hydro Energy, Dept Naval Architecture & Marine Engn, Ann Arbor, MI USA
[5] CTO Vortex Hydro Energy, Dept Mech Engn, Ann Arbor, MI USA
来源：
PROCEEDINGS OF THE ASME 36TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING, 2017, VOL 10 | 2017年
基金：
中国国家自然科学基金;
关键词：
WAKE-INDUCED VIBRATION; INTERFERENCE-INDUCED OSCILLATIONS; CIRCULAR-CYLINDERS; TANDEM;
D O I：
暂无
中图分类号：
P75 [海洋工程];
学科分类号：
0814 ; 081505 ; 0824 ; 082401 ;
摘要：
Flow-induced vibrations of two elastically mounted circular cylinders in staggered arrangement were experimentally investigated. The Reynolds number range for all experiments (2.5x10(4)<Re<1.2x10(5)) was in the TrSL3 flow regime. The oscillator parameters selected were: mass ratio m*=1.343, spring stiffness K=250N/m, and damping ratio zeta=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 (Tick) 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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页数：9
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