Concomitant vortex-induced vibration experiments: a cantilevered flexible cylinder and a rigid cylinder mounted on a leaf-spring apparatus
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- 作者：Guilherme Rosa Franzini (1) (2)
Celso P. Pesce (1)
Rodolfo T. Gon?alves (2)
André L. C. Fujarra (1) (2)
Adriano A. P. Pereira (3) - 关键词：VIV ; Rigid cylinder ; Flexible cylinder ; Concomitant measures ; Hilbert–Huang technique ; Leaf ; spring apparatus
- 刊名：Journal of the Brazilian Society of Mechanical Sciences and Engineering
- 出版年：2014
- 出版时间：May 2014
- 年：2014
- 卷：36
- 期：3
- 页码：547-558
- 全文大小：
- 参考文献：1. Bearman PW (1984) Vortex shedding from oscillating bluff bodies. Annu Rev Fluids Mech 16:195-22 CrossRef
2. Blevins RD (1990) Flow-induced vibration. Krieger, Malabar
3. Blevins RD, Coughran CS (2009) Experimental investigation of vortex-induced vibration in one and two dimensions with variable mass, damping, and Reynolds number. J Fluids Eng, Vol 131
4. Franzini GR, Pereira AAP, Fujarra ALC, Pesce CP (2008) Experiments of VIV under frequency modulation and at Constant Reynolds Number. In: Proceedings of the OMAE08, 27th international conference on offshore mechanics and arctic engineering, Lisbon
5. Franzini GR, Pesce CP, Gon?alves RT, Fujarra ALC, Meneghini JR, (2010) An experimental investigation on frequency modulated VIV in a water channel. In: BBVIV6—Proceedings of the 6th bluff bodies wakes and vortex-induced vibrations conference
6. Franzini GR, Pesce CP, Gon?alves RT, Fujarra ALC, Pereira APP (2011) Analysis of multimodal vortex-induced vibrations using the Hilbert–Huang spectral analysis.In: Proceedings of the 3rd conference of Hilbert–Huang transform: theory and applications
7. Fujarra ALC, Pesce CP (2002) Added mass of an elastically mounted rigid cylinder in water subjected to vortex-induced vibrations. In: Proceedings of the 21st international conference on offshore mechanics and arctic engineering, Oslo, 23-8 June
8. Fujarra ALC, Pesce CP, Flemming F, Williamson CHK (2001) Vortex-induced vibrations of a flexible cantilever. J Fluids Struct 15(3-):651-58 CrossRef
9. Gon?alves RT, Rosetti GF, Franzini GR, Fujarra ALC, Nishimoto K (2010) “Case study of vortex-induced motions (VIM) on a monocolumn platform applying the Hilbert–Huang transform method- In: Proceedings of the 20th international offshore (ocean) and polar engineering conference, Beijing
10. Gon?alves RT, Franzini GR, Rosetti GF, Fujarra ALC, Nishimoto K (2012) Analysis methodology for vortex-induced motions (VIM) of a monocolumn platform applying the Hilbert–Huang transform method. J Offshore Mech Arct Eng 133:011103-1-11103-7
11. Gon?alves RT, Freire CM, Rosetti GF, Franzini GR, Fujarra ALC, Meneghini JR (2011b) Experimental comparisons to asssure the similiarity between VIM (vortex-induced motions) and VIV (vortex-induced vibration) phenomena, to appear in the 30th international conference on ocean, offshore and arctic engineering, Rotterdam
12. Govardhan RN, Williamson CHK (2000) Modes of vortex formation and frequency response of a freely vibrating cylinder. J Fluid Mech 420:85-30 CrossRef
13. Govardhan RN, Williamson CHK (2006) Defining the ‘modified griffin plot-in vortex-induced vibration: revealing the effect of Reynolds number using controlled damping. J Fluid Mech 561:147-80 CrossRef
14. Huang NE, Shen Z, Long SR, Wu MC, Shih HH, Zheng Q, Yen N, Tung CC, Liu HH (1998) The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis. Proc R Soc A 454:903-55 CrossRef
15. Jauvtis N, Williamson CHK (2004) The effect of two degrees of freedom on vortex-induced vibration at low mass and damping. J Fluid Mech 509:23-2 CrossRef
16. Khalak A, Williamson CHK (1999) Motions, forces and modes transitions in vortex-induced vibration at low Reynolds number. J Fluids Struct 13:813-51 CrossRef
17. Morse TL, Govardhan RN, Williamson CHK (2008) The effect of end conditions on the vortex-induced vibration of cylinders. J Fluids Struct 24:1227-239 CrossRef
18. Pesce CP, Fujarra ALC (2000) Vortex-induced vibrations and jump phenomenon: experiments with a clamped flexible cylinder in water. Int J Offshore Polar Eng 10:26-3
19. Pesce CP, Fujarra ALC (2005) The ‘super-upper branch-VIV response of flexible cylinders, BBVIV4, June 2005, Santorini
20. Pesce CP, Fujarra ALC, Kubota LK (2006a) The Hilbert–Huang spectral analysis method applied to VIV. In: Proceedings OMAE06, 25th international conference on offshore mechanics and arctic engineering, Hamburg
21. Pesce CP, Martins CA, Silveira LMY (2006) Riser-soil interaction: local dynamics at TDP and a discussion on the eigenvalue and the viv problems. J Offshore Mech Arct Eng 128:39-5 CrossRef
22. Silveira LMY, Martins CA, Cunha LD, Pesce CP (2007) An investigation on the effect of tension variation on VIV of risers. In: Proceedings of OMAE-7, 26th international conference on offshore mechanics and arctic engineering, 10-5 June, San Diego
23. Stappenbelt B, Lalji F (2008) Vortex-induced vibration super-upper response branch boundaries. Int J Offshore Polar Eng 18:99-05
24. Williamson CHK, Govardhan RN (2004) Vortex induced vibrations. Annu Rev Fluids Mech 36:43-55 - 作者单位：Guilherme Rosa Franzini (1) (2)
Celso P. Pesce (1)
Rodolfo T. Gon?alves (2)
André L. C. Fujarra (1) (2)
Adriano A. P. Pereira (3)
1. Offshore Mechanics Laboratory, Escola Politécnica, University of S?o Paulo, S?o Paulo, Brazil
2. Numerical Offshore Tank, TPN, Escola Politécnica, University of S?o Paulo, S?o Paulo, Brazil
3. Technological Research Institute, S?o Paulo, Brazil - ISSN：1806-3691
文摘
This paper presents experimental results of vortex-induced vibrations (VIV), concomitantly carried out in water with a flexible cylinder, rigidly fixed, and with a ‘rigid-cylinder, mounted on an elastic apparatus. The experiments were run at IPT towing tank facility, in a side-by-side arrangement. The flexible cylinder is simply fixed at the upper end. For the flexible cylinder, two degrees of freedom (2DOF) are implied for each vibration mode: crosswise and aligned with respect to the incident flow. The elastic support to which the ‘rigid-cylinder is mounted is made of two vertical leaf-springs, fixed to two thick horizontal plates, conferring to the cylinder a single degree of freedom (SDOF) to oscillate transversally with respect to the incident flow. The mass ratios of the cylinders are almost the same, around 1.2 and 1.4, respectively, very low values, typical of long ocean pipe structures, as risers and pipelines. The structural damping ratio is also typically low and such as to guarantee high-amplitude responses. Besides usual spectral and statistical analysis, the Hilbert–Huang spectral analysis technique is applied, as, strictly, VIV is a non-stationary oscillation emerged from a nonlinear dynamic system. A discussion is made on the distinct VIV behaviors of the SDOF and the 2DOF systems.