PSI - Issue 82

Ivan Ćatipović et al. / Procedia Structural Integrity 82 (2026) 302 – 308 I. Ćatipović et al./ Structural Integrity Procedia 00 (2026) 000–000

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were used across the extension range, while only 8-polynomial was tested for the latter. The tension-extension results from these approaches were compared to OCIMF (2008). Large errors above 15% are possible at low tensions (up to 5% of the MBL), but for tensions above 5%, errors are within 1.5% when using 8 polynomials. This is below the common 2% engineering limit, keeping in mind that DNVGL-OS-E301 (2015) requires at least 10% of MBL for pretension to avoid snapping loads. Acknowledgements This work was supported by the Croatian Science Foundation under the project number HRZZ-IP-2022-10-4408. References API RP 16Q, 2017. Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems. American Petroleum Institute. Ćatipović, I., Alujević, N., Rudan, S., Slapničar, V., 2021a. Improved dynamics model for synthetic fibre mooring lines. Proceedings of International Conference on Ships and Offshore Structures (ICSOS 2021). Hamburg, Germany. 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