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Analysis on multi-frequency vortex-induced vibration and mode competition of flexible deep-ocean riser in sheared fluid fields
Li YL; Guo SX(郭双喜); Chen WM(陈伟民)
2018-04-01
发表期刊JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
卷号163页码:378-386
ISSN0920-4105
摘要Multi-frequency vortex-induced vibration of flexible riser in lineally sheared fluid fields with different shearing parameters is explored by using the numerical approach. By combining the finite element method with a hydrodynamic model, the approach can consider mode competition based on modal energy and can carry out nonlinearly simultaneously dynamic response in time domain. Our analysis shows that multi-frequency VIV may occur both in non-uniform and uniform fluid fields. And, the behaviors of multi-frequency VIV are different from single-frequency VIV. Because several modes are involved and compete with each other, and consequently the determination of modal excitation region become more complicated. As the towing speed (or the shearing parameter) increases in sheared flow, the average RMS displacement does not regularly rise (or drop), but slightly fluctuates owing to changes of the participating mode and its excitation region. On the other hand, the average RMS stress gradually rises owing to higher-order modes being included. Moreover, it is found that the dominant frequency distributing along structural span significantly changes with the towing speed, and the length of the first dominant frequency gets smaller due to larger shearing parameter along with more intense competition between the participating modes.
关键词Vortex-induced vibration Multi-frequency Mode competition Fluid-solid coupling Long flexible riser
DOI10.1016/j.petrol.2018.01.008
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000426417400033
关键词[WOS]DYNAMIC CHARACTERISTICS ; FORCE DISTRIBUTION ; CIRCULAR-CYLINDER ; FLOW ; VIV
WOS研究方向Energy & Fuels ; Engineering, Petroleum
WOS类目Energy & Fuels ; Engineering
项目资助者National Natural Science Foundation of China [11232012, 11372320]
论文分区一类
力学所作者排名1
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77811
专题流固耦合系统力学重点实验室
作者单位1.Beihang Univ, Sinofrench Engn Sch, Beijing 100191, Peoples R China
2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China
3.AVIC Composite Corp LTD, Natl Key Lab Adv Composites, Beijing, Peoples R China
4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
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Li YL,Guo SX,Chen WM. Analysis on multi-frequency vortex-induced vibration and mode competition of flexible deep-ocean riser in sheared fluid fields[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2018,163:378-386.
APA Li YL,郭双喜,&陈伟民.(2018).Analysis on multi-frequency vortex-induced vibration and mode competition of flexible deep-ocean riser in sheared fluid fields.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,163,378-386.
MLA Li YL,et al."Analysis on multi-frequency vortex-induced vibration and mode competition of flexible deep-ocean riser in sheared fluid fields".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 163(2018):378-386.
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