A study on the dynamic responses of a steel catenary riser transporting varying-density flow and subjected to regular waves

Xie, Wude; Liang, Zhenlin; Jiang, Zhaoyang; Pan, Jiahui; Hu, Zhongyuan; Cabrera, José Luis

doi:10.1016/j.oceaneng.2022.112670

Cited by 9 publications

(3 citation statements)

References 39 publications

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“…The Morison formula is used to establish the relationship between ocean current velocity and the environmental loads acting on the submarine pipeline. With Morison's equation [45][46][47][48], the ocean current-induced forces on the submarine pipeline in the normal (F n ) and tangential (F t ) directions can be written as…”

Section: Environmental Loadingsmentioning

confidence: 99%

An Analytical Method for Mechanical Analysis of Offshore Pipelines during Lifting Operation

Wang,

Chen,

Gao

et al. 2023

Materials

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The lifting operation of offshore pipelines is an important step in ocean pipeline engineering. An effective analytical method is developed for investigating the mechanical properties of the pipeline based on mechanical, physical, and geometric relationships. By using the shooting and the secant methods to transform the boundary value problem into an initial value one and then solving them with the Runge–Kutta method, the deformation and mechanical properties of the pipeline are calculated. Furthermore, based on the Det Norske Veritas (DNV) offshore standard, the mechanical properties of the pipeline are checked. The finite element method (FEM) by Orcaflex is employed to verify the accuracy of the analytical model. The effects of some factors such as the current velocity and lifting point position on the mechanical properties of the pipeline are analyzed based on the analytical model. The results indicate that the change in current velocity during the lifting process has a minimal effect on the pipeline, but the change in lifting point position significantly affects the deformation and mechanical properties of the pipeline.

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Section: Environmental Loadingsmentioning

confidence: 99%

An Analytical Method for Mechanical Analysis of Offshore Pipelines during Lifting Operation

Wang,

Chen,

Gao

et al. 2023

Materials

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“…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%

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

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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.

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Dynamic Analysis of A Deep-Water Compliant Vertical Access Riser with A Variable Length During Installation

Liang,

Lou,

Wang

et al. 2023

China Ocean Eng

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A study on the dynamic responses of a steel catenary riser transporting varying-density flow and subjected to regular waves

Cited by 9 publications

References 39 publications

An Analytical Method for Mechanical Analysis of Offshore Pipelines during Lifting Operation

An Analytical Method for Mechanical Analysis of Offshore Pipelines during Lifting Operation

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

Dynamic Analysis of A Deep-Water Compliant Vertical Access Riser with A Variable Length During Installation

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