If heave motion in the platform causes horizontal parametric vibration of a Compliant Vertical Access Riser (CVAR), the riser may become unstable. A combination of riser parameters lies in the unstable region aggravates vibrational damage to the riser. Change of axial tensile stress in the riser combined with its natural frequency and mode shape change results in mode coupling. In accordance with the state transition matrices of the riser in the coupled and uncoupled states, the stable and unstable regions were obtained by Floquet theory, and the vibration response under different conditions was obtained. The parametric excitation of the CVAR is shown to occur mainly in first-order unstable regions. Mode coupling may cause parametric excitation in the least stable regions. Damping reduces the extent of unstable regions to a certain extent. Keywords: Compliant Vertical Access Riser (CVAR), Parametric excitation, Vibration response, Unstable regions


    Access

    Download


    Export, share and cite



    Title :

    Stability analysis of deepwater compliant vertical access riser about parametric excitation


    Contributors:
    Min Lou (author) / Ping Hu (author) / Xiaoliang Qi (author) / Hongwei Li (author)


    Publication date :

    2019




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    Static performance analysis of deepwater compliant vertical access risers

    Min Lou / Run Li / Wugang Wu et al. | DOAJ | 2019

    Free access

    Deepwater pipeline & riser technology

    Pipes & Pipeline International / Clarion Technical Conferences | British Library Conference Proceedings | 2001


    Instability analysis of deepwater riser with fairings

    Khorasanchi, Mahdi / Huang, Shan | Tema Archive | 2014


    The deepwater pipeline & riser technology

    Pipes & Pipeline International / Clarion Technical Conferences | British Library Conference Proceedings | 2000


    Fatigue damage analysis of the deepwater riser from VIV using pseudo-excitation method

    Sun, L. / Liu, C. F. / Zong, Z. et al. | British Library Online Contents | 2014