Application of 2d-wave spectra time series for pipelaying vessel stinger structural assessment
Document typeConference report
Rights accessOpen Access
In the recent years offshore oil and gas field development activities are moving towards deeper and more remote regions for which high performing installation spread is requested. In those conditions, the offshore pipeline installation in S-lay mode, that is generally preferred being more fast and efficient, presents many challenges in pipeline overbend section and requests a longer curved stinger section to support the pipeline weight during installation. The present paper is focused on stinger structure design and verification and describes the methodology followed to perform advanced global combined hydrodynamic and structural analysis through application of hindcasted 2D wave time series. The analysis is carried out in frequency domain, the vessel motion inducing stinger loads are calculated through application of vessel RAOs and a more realistic description of directional wave energy distribution through 2D sea spectra. Within the proposed methodology a more realistic estimation of dynamic forces vessel motion induced is achieved permitting an higher optimization in material utilization. The practical consequence is that the vessel operational limits can be extended but a more careful management of the offshore operation during execution phase is requested.
CitationDel Guzzo, A. [et al.]. Application of 2d-wave spectra time series for pipelaying vessel stinger structural assessment. A: MARINE VII. "MARINE VII : proceedings of the VII International Conference on Computational Methods in Marine Engineering". CIMNE, 2017, p. 1098-1109. ISBN 978-84-946909-8-3.
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