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Evaluation of Operational Parameters for Vessel's Flexible Subsea Pipelines
  • +3
  • Oleksiy Malakhov,
  • Kiris O.V.,
  • Andrii Bondarenko,
  • Kozyryev I.P.,
  • Oleksandr Palagin,
  • Andrii Naydyonov
Oleksiy Malakhov
Nacional'nij universitet Odes'ka mors'ka akademia

Corresponding Author:a_malahov@yahoo.com

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Kiris O.V.
Nacional'nij universitet Odes'ka mors'ka akademia
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Andrii Bondarenko
Nacional'nij universitet Odes'ka mors'ka akademia
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Kozyryev I.P.
Nacional'nij universitet Odes'ka mors'ka akademia
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Oleksandr Palagin
Nacional'nij universitet Odes'ka mors'ka akademia
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Andrii Naydyonov
Nacional'nij universitet Odes'ka mors'ka akademia
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Abstract

The operation of offshore vessels is directly related to the use of flexible pipelines. The article describes in detail the analysis of power, geometric, kinematic and technological parameters that affect the main operational characteristics of these pipes during their operation under water, in rough sea conditions and under wind loads. The article describes the degree of dependence between loads on the pipeline and velocity of the oncoming flow, the geometry of the pipe and the distance to the rigid surface of the ship’s hull or the seabed. It was determined how the flow velocity during parametric oscillations of the pipeline in unrestricted flow and near the surface of the seabed affects the change in its drag and lift coefficients. An estimate of operational limits of flexible pipeline instability was obtained. On the base of changes in distributed load, specific values for safe lengths of pipelines were formulated. It has been stated that the probability of failure-free operation of a flexible pipeline at a level of 0.99 is directly determined by the frequency of its oscillation. Its numerical values should always be at a level that does not exceed 3.7% of the frequency of pipe dynamic oscillations.
Submitted to Engineering Reports
02 Jun 2024Review(s) Completed, Editorial Evaluation Pending
11 Jul 20241st Revision Received
15 Jul 2024Submission Checks Completed
15 Jul 2024Assigned to Editor
15 Jul 2024Review(s) Completed, Editorial Evaluation Pending
15 Jul 2024Reviewer(s) Assigned
08 Aug 2024Editorial Decision: Accept