EFFECT OF DAMPING ON VIV RESPONSE IN UMBILICALS AND FLEXIBLE RISERS

被引:0
|
作者
Hansen-Zahl, Kay [1 ]
Henoen, Veronica [1 ]
Baarholm, Rolf [2 ]
Parsinejad, Farzan [3 ]
Constantinides, Yiannis [3 ]
机构
[1] DNV GL AS, Trondheim, Norway
[2] Statoil, Trondheim, Norway
[3] Chevron, Houston, TX USA
关键词
D O I
暂无
中图分类号
U6 [水路运输]; P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
The fatigue life assessment of umbilicals and flexible risers due to vortex-induced vibrations (VIV) require special attention to the structural properties of the flexible bundle due to stick/slip behavior of helical elements in bending. The VIV response on umbilicals and flexible risers is complex, and it is controlled by several parameters. Structural damping is one of these parameters, but this is typically calculated based on the material damping of the structure. Similar to flexible risers and umbilicals, hysteresis damping due to the stick/slip behavior in the helical layers may be significant for cable structures. The purpose of this study is to evaluate the effect of the hysteresis damping on VIV response, and to demonstrate a procedure for consistent VIV fatigue analysis of flexible risers and umbilicals. The stick/slip hysteresis varies with varying contact force, and the contact force is dependent on internal pressure and effective tension. The effect of varying these parameters is included in the study. Furthermore, the study includes different riser system configurations and current profiles. In this paper, the stick/slip hysteresis has been established for two umbilicals and two flexible risers, with varying internal pressure and effective tension. Combined with five different configurations (both shallow and deep water) and 16 different current profiles, the VIV modes have been calculated and the corresponding stick/slip modal damping ratio has been established. Finally, using fatigue current profiles, fatigue life estimates have been made based on different damping ratios, including the estimated stick/slip damping ratio. The study presented in this paper has been carried out as part of the Norwegian Deepwater Programme (NDP).
引用
收藏
页数:11
相关论文
共 50 条
  • [1] Investigation of the influence of waves and vessel motions on the VIV response of flexible risers and umbilicals from a fatigue damage perspective
    Trarieux, F.
    Lyons, G. J.
    Vaz, M.
    Patel, M. H.
    Garnham, S.
    [J]. Proceedings of the 25th International Conference on Offshore Mechanics and Arctic Engineering, Vol 4, 2006, : 475 - 486
  • [2] VIV response prediction for long risers with variable damping
    Jaiswal, Vivek
    Vandiver, J. Kim
    [J]. Proceedings of the 26th International Conference on Offshore Mechanics and Arctic Engineering, Vol 3, 2007, : 901 - 909
  • [3] EFFICIENT FATIGUE ANALYSIS OF HELIX ELEMENTS IN UMBILICALS AND FLEXIBLE RISERS
    Sodahl, Nils
    Skeie, Geir
    Steinkjer, Oddrun
    Kalleklev, Arve Johan
    [J]. PROCEEDINGS OF THE ASME 29TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING 2010, VOL 5, PTS A AND B, 2010, : 1029 - 1037
  • [4] CONSISTENT VIV ASSESSMENT METHODLOGY FOR UNBONDED FLEXIBLE RISERS
    Ferdi, Faycal
    Puliafito, Marco
    Willis, Neil
    [J]. PROCEEDINGS OF THE ASME 36TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING, 2017, VOL 5A, 2017,
  • [6] Stripwise discrete vortex method for VIV analysis of flexible risers
    Sun, L.
    Zong, Z.
    Dong, J.
    Dong, G. H.
    Liu, C. F.
    [J]. JOURNAL OF FLUIDS AND STRUCTURES, 2012, 35 : 21 - 49
  • [7] Efficient Fatigue Analysis of Helix Elements in Umbilicals and Flexible Risers: Theory and Applications
    Skeie, Geir
    Sodahl, Nils
    Steinkjer, Oddrun
    [J]. JOURNAL OF APPLIED MATHEMATICS, 2012,
  • [8] An investigation on the effect of tension variation on VIV of risers
    da Silveira, Lauro M. Y.
    Martins, Clovis de A.
    Cunha, Leandro D.
    Pesce, Celso P.
    [J]. PROCEEDINGS OF THE 26TH INTERNATIONAL CONFERENCE ON OFFSHORE MECHANICS AND ARCTIC ENGINEERING, VOL 1, 2007, : 267 - 275
  • [9] Investigation on Numerical Simulation of VIV of Deep-Sea Flexible Risers
    Jia, Liyuan
    Sang, Song
    Shi, Xiao
    Shen, Fukui
    [J]. APPLIED SCIENCES-BASEL, 2023, 13 (14):
  • [10] Viscoelastic damping of flexible risers: Theoretical model
    Liu, Junpeng
    Ma, Jinsheng
    Vaz, Murilo Augusto
    Duan, Menglan
    [J]. OCEAN ENGINEERING, 2020, 217