Comparison of damage sensitivities of autoregressive coefficients and natural frequencies for structural health monitoring of a top tensioned riser

Research output: Contribution to conferencePaper

Abstract

Risers are important components of offshore oil extraction facilities as they connect the surface structure to a pipeline or well-head on the seabed to transport hydrocarbons between the two. Damage incidents in risers may lead to catastrophic economic, environmental and human safety consequences. To avoid the disastrous outcomes of such incidents, early detection of damage in risers is of paramount importance and vibration-based structural health monitoring (SHM) is a promising means of achieving this. Although vibration-based SHM has been extensively studied for several types of structures and systems such as rotating machinery, aerospace structures, bridges and wind turbines, its application to risers has hardly been explored to date. In this paper, application of vibration-based SHM to a top tensioned riser is investigated. To that end, an analytical distributed parameter model is formulated using the Galerkin method and dynamic response of the riser to ambient surface wave excitations is obtained at the healthy and damaged states. Corrosion damage is considered here as it is the predominant cause of damage incidents in risers and it is modelled as cross-sectional area loss at the damaged portion of the riser. To represent the wave excitations realistically, energy density distribution of the sea states is obtained from the JONSWAP wave spectrum. Finally, from the dynamic response of the riser, auto-regressive coefficients and riser natural frequencies are identified and their damage sensitivities are compared for a series of damage extents.

Original languageEnglish
Publication statusPublished - Jul 2018
Event9th European Workshop on Structural Health Monitoring, EWSHM 2018 - Manchester, United Kingdom
Duration: 10 Jul 201813 Jul 2018

Conference

Conference9th European Workshop on Structural Health Monitoring, EWSHM 2018
CountryUnited Kingdom
CityManchester
Period10/07/1813/07/18

Fingerprint

Structural health monitoring
Natural frequencies
Dynamic response
Rotating machinery
Excitation energy
Galerkin methods
Surface structure
Surface waves
Wind turbines
Pipelines
Hydrocarbons
Corrosion
Economics

Keywords

  • corrosion
  • pipes
  • offshore structures
  • vibration analysis and testing

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture

Cite this

Bayik, B., Omenzetter, P., van Der A, D., & Pavlovskaia, E. (2018). Comparison of damage sensitivities of autoregressive coefficients and natural frequencies for structural health monitoring of a top tensioned riser. Paper presented at 9th European Workshop on Structural Health Monitoring, EWSHM 2018, Manchester, United Kingdom.

Comparison of damage sensitivities of autoregressive coefficients and natural frequencies for structural health monitoring of a top tensioned riser. / Bayik, Bugra; Omenzetter, Piotr; van Der A, Dominic; Pavlovskaia, Ekaterina.

2018. Paper presented at 9th European Workshop on Structural Health Monitoring, EWSHM 2018, Manchester, United Kingdom.

Research output: Contribution to conferencePaper

Bayik, B, Omenzetter, P, van Der A, D & Pavlovskaia, E 2018, 'Comparison of damage sensitivities of autoregressive coefficients and natural frequencies for structural health monitoring of a top tensioned riser' Paper presented at 9th European Workshop on Structural Health Monitoring, EWSHM 2018, Manchester, United Kingdom, 10/07/18 - 13/07/18, .
Bayik B, Omenzetter P, van Der A D, Pavlovskaia E. Comparison of damage sensitivities of autoregressive coefficients and natural frequencies for structural health monitoring of a top tensioned riser. 2018. Paper presented at 9th European Workshop on Structural Health Monitoring, EWSHM 2018, Manchester, United Kingdom.
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