An alternative vessel excitation algorithm to incorporate the trench effect into the fatigue analysis of steel catenary risers in the touchdown zone

Rokni, Hossein; Shiri, Hodjat

doi:10.1016/j.apor.2022.103292

Cited by 5 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 Hence, SCRs manufactured by welding numerous standard-size pipe segments are increasingly attractive for deep-water field developments. [3][4][5] During its service period, an SCR inevitably suffers severe alternate loads along the pipeline direction while floating in the deep sea. 6 To prevent fatigue failure of SCR joints while in service, the fatigue lives of SCRs are always emphasized in the design stage, that is, the BS7608 standard requires that the fatigue life of the SCR joint should meet the requirements of the D-grade design line.…”

Section: Introductionmentioning

confidence: 99%

“…Compared with large‐diameter flexible risers, flexible steel catenary risers (SCRs) have a small pipe diameter and large wall thickness, giving them the advantages of low cost and suitability for high‐temperature and high‐pressure environments 2 . Hence, SCRs manufactured by welding numerous standard‐size pipe segments are increasingly attractive for deep‐water field developments 3–5 …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fatigue testing strategies for the X65 steel catenary riser with small‐scale specimens considering the effect of welding residual stress

Zhang,

Deng,

Liang

et al. 2024

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

To accurately evaluate the fatigue performance of a full‐scale deep‐water steel catenary riser (SCR) using small‐size specimens, six fatigue testing strategies were explored, considering the effect of welding residual stress. Through a comparison with the full‐scale resonant bending fatigue testing results, the most equivalent strategy using small‐scale specimens was identified. The results indicate that the test strategies applying constant stress underestimated the fatigue life, compared with that of a full‐scale specimen; meanwhile, fatigue life values obtained from the low‐stress ratio testing strategy were higher, particularly in the low‐stress range region. Comparatively, the fatigue lives obtained for the 100 mm‐wide specimens without cutting were higher in the high‐stress range region. The variable‐applied mean stress strategy using the 25 mm‐wide welded joint specimen was the most suitable for equivalence with the full‐scale fatigue testing, with only a 9.7% difference in the fatigue life testing results. The difference between the applied mean stress and the actual transverse welding residual stress under various fatigue testing strategies is the key factor affecting the equivalence of the fatigue testing results.

show abstract