To meet the increasing challenges of simple steel catenary riser on large hang-off tension and fatigue damage of the touchdown point (TDP) in deepwater or ultra deepwater applications, the steel lazy-wave risers (SLWR) have gained a viable solution. This paper is focused on the static equilibrium of SLWR which is of great importance to the basic configuration design of the riser. A more accurate model based on nonlinear large deformation beam theory is proposed to simulate the suspended part of SLWR, having evident advantage over previously applied small deformation beam or catenary theory which ignores the riser's bending stiffness and is hard to simulate the rapid change of the inclination angle. The model also deals with the pipe–soil interaction for simulating the TDP. The finite difference method is applied to obtain the numerical solutions. The results are comparatively in agreement with OrcaFlex. As an application, parametric analysis of the SLWR is carried out to investigate the influences of arc length of buoyancy section, arc length of upper section and soil stiffness on the static performance. The proposed model can be a basic reference for the dynamic analysis of the deepwater SLWR.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Numerical solutions for nonlinear large deformation behaviour of deepwater steel lazy-wave riser


    Contributors:
    Wang, Jinlong (author) / Duan, Menglan (author) / He, Tong (author) / Jing, Cao (author)

    Published in:

    Publication date :

    2014-11-02


    Size :

    14 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Numerical analysis of configuration for steel lazy-wave riser in deepwater

    Chen, Leilei / Gu, Jijun / Jia, Jichuan et al. | Taylor & Francis Verlag | 2023



    DEEPWATER DISCONNECTABLE TURRET SYSTEM WITH LAZY WAVE RIGID RISER CONFIGURATION

    CAO PEIMIN / LAVAGNA PHILIPPE | European Patent Office | 2021

    Free access

    DEEPWATER DISCONNECTABLE TURRET SYSTEM WITH LAZY WAVE RIGID RISER CONFIGURATION

    CAO PEIMIN / LAVAGNA PHILIPPE | European Patent Office | 2018

    Free access

    DEEPWATER DISCONNECTABLE TURRET SYSTEM WITH LAZY WAVE RIGID RISER CONFIGURATION

    TSAO PEJMIN / LAVANYA FILIPP | European Patent Office | 2018

    Free access