An experimental investigation of one- and two-degree of freedom VIV of cylinders

被引：16

作者：

Kang, Zhuang ^{[1
]}

Jia, Lu-Sheng ^{[2
]}

机构：

[1] Harbin Engn Univ, Coll Shipbldg, Harbin 150001, Peoples R China

[2] CNOOC Res Inst, Beijing 100027, Peoples R China

来源：

ACTA MECHANICA SINICA | 2013年 / 29卷 / 02期

基金：

中国国家自然科学基金;

关键词：

One- and two-degree of freedom VIV; 2T" wake; New moon" trajectory; Natural vibration frequency ratio; VORTEX-INDUCED VIBRATIONS;

D O I：

10.1007/s10409-013-0014-5

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In the paper, an experiment investigation was conducted for one- and two-degree of freedom vortex-induced vibration (VIV) of a horizontally-oriented cylinder with diameter of 11 cm and length of 120 cm. In the experiment, the spring constants in the cross-flow and in-line flow directions were regulated to change the natural vibration frequency of the model system. It was found that, in the one-degree of freedom VIV experiment, a "double peak" phenomenon was observed in its amplitude within the range of the reduced velocities tested, moreover, a "2T" wake appeared in the vicinity of the second peak. In the two-degree of freedom VIV experiment, the trajectory of cylinder exhibited a reverse "C" shape, i.e., a "new moon" shape. Through analysis of these data, it appears that, besides the non-dimensional in-line and cross-flow natural vibration frequency ratios, the absolute value of the natural vibration frequency of cylinder is also one of the important parameters affecting its VIV behavior.

引用

页码：284 / 293

页数：10

共 18 条

[1] Two-degree-of-freedom vortex-induced vibrations using a force assisted apparatus [J].

Dahl, J. M. ;

Hover, F. S. ;

Triantafyllou, M. S. .

JOURNAL OF FLUIDS AND STRUCTURES, 2006, 22 (6-7) :807-818

[2]

FENG CC, 1968, THESIS U BRITISH COL

[3] Vortex-induced vibration of a flexible cantilever [J].

Fujarra, ALC ;

Pesce, CP ;

Flemming, F ;

Williamson, CHK .

JOURNAL OF FLUIDS AND STRUCTURES, 2001, 15 (3-4) :651-658

[4] Vortex-induced vibration of a cylinder with two degrees of freedom [J].

Jauvtis, N ;

Williamson, CHK .

JOURNAL OF FLUIDS AND STRUCTURES, 2003, 17 (07) :1035-1042

[5] An application of system identification in the two-degree-freedom VIV experiments [J].

Kang Z. ;

Webster W.C. .

Journal of Marine Science and Application, 2009, 8 (2) :99-104

[6]

Kawai H., 1994, J WIND ENG, V59, P49

[7] Motions, forces and mode transitions in vortex-induced vibrations at low mass-damping [J].

Khalak, A ;

Williamson, CHK .

JOURNAL OF FLUIDS AND STRUCTURES, 1999, 13 (7-8) :813-851

[8] Effects of free-end condition on end-cell-induced vibration [J].

Kitagawa, T ;

Fujino, Y ;

Kimura, K .

JOURNAL OF FLUIDS AND STRUCTURES, 1999, 13 (04) :499-518

[9]

PAN Z.Y., 2005, J SHIP MECH, V9, P115

[10]

Ren T., 2011, J. Ship Mechanics, V15, P364, DOI 10.3969/j.issn.1007-7294.2011.04.006

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