Citation:
Ai Shang-mao* and SUN Li-ping.The effect of functional loads on free spanning pipeline’s VIV response[J].Journal of Marine Science and Application,2009,(2):151-155.
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The effect of functional loads on free spanning pipeline’s VIV response
Ai Shang-mao* and SUN Li-ping.The effect of functional loads on free spanning pipeline’s VIV response[J].Journal of Marine Science and Application,2009,(2):151-155.
Info
- Title:
- The effect of functional loads on free spanning pipeline’s VIV response
- Author(s):
- Ai Shang-mao* and SUN Li-ping
- Affilations:
- Keywords:
- free spanning pipeline; VIV; functional load; internal flow
- DOI:
- -
- Abstract:
- During the operation and installation of offshore pipelines, high axial forces and pressures are experienced, and their effects cannot be neglected. In this article, the effect of internal flow velocity and functional loads on vortex-induced vibration (VIV) response is investigated. On the basis of the Hamilton principle, a differential equation was derived to describe the motion of a pinned-pinned tensioned spanning pipeline conveying fluid. The VIV response was calculated according to DNV-RP-F105 under different functional loads. The results showed that functional loads influence free spanning pipeline VIV response by changing the natural frequency. Internal flow velocity was found less important for VIV response than other functional load factors, such as effective axial force, because the speed in reality is not high enough to be significant. The research may provide a reference for sensitivity studies of the effect of functional loads on allowable free span lengths.
References:
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[5] DNV-RP-F105: Free spanning pipelines[M]. Høvik, Norway, 2006. [6] NIELSEN F G, KVARME S O, SOREIDE T. VIV response of long free spanning pipelines[C]// 21st International Conference on Offshore Mechanics and Arctic Engineering, (OMAE 2002). Oslo, Norway: ASME, June 2002.
[7] FYRILEIV O, CHEZHIAN M, MORK K. Experiences using DNV-RP-F105 in assessment of free spanning pipelines[C]// Proc of 24th International Conference on Offshore Mechanical and Arctic Engineering (OMAE 2005). Halkidiki, Greece: ASME, June 2005.
[8] MORK K J, FYRILEIV O, CHEZHIAN, et al. Assessment of VIV induced fatigue in long free spanning pipelines[C]// 22nd International Conference on Offshore Mechanics and Arctic Engineering (OMAE 2003). Cancun, Mexico: ASME, 2003, 8-13.
Memo
- Memo:
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