Bottom-mounted slender structures are often flexible enough to induce hydroelastic effect which could change their dynamic properties and affects the resultant response. This study presents a frequency-domain approach to characterise the hydroelastic response as well as wet dynamic characteristics for offshore bottom-mounted structure with arbitrary geometry. The boundary element method associated with Euler-Bernoulli theory is integrated and coupled. The approaches for wet fundamental period, wet damping ratio and hydroelastic response are validated against a benchmark experiment. Results show that surrounding water has obvious influence on the structural period and damping ratio, particularly on damping ratio. The distribution of added mass grows quickly with depth to about z/d = 0.2 and then gradually decreases whereas added damping mainly concentrates near free surface and drops rapidly with depth. If hydroelastic effect is not considered, it could cause considerable frequency-to-frequency errors from −26% to 52% in responses.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Frequency-domain approach of hydroelastic response for offshore bottom-mounted slender structure


    Contributors:
    Ti, Zilong (author) / Wang, Yanfeng (author) / Song, Yubing (author)

    Published in:

    Ships and Offshore Structures ; 18 , 8 ; 1159-1170


    Publication date :

    2023-08-03


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    Hydroelastic Model for Bottom Slamming

    Bereznitski, A. / Postnov, V. | British Library Conference Proceedings | 2001


    Hydroelastic response analysis of VLFS over variable bottom in waves

    Sun, H. / Cui, W. C. / Wu, Y. S. et al. | British Library Conference Proceedings | 2003


    Similarity method for modelling hydroelastic offshore platforms

    Shumin, C. / Swamidas, A.S.J. / Sharp, J.J. | Tema Archive | 1996


    Hydroelastic response of a very large floating structure over a variable bottom topography

    Kyoung, Jo-Hyun / Hong, Sa-Young / Kim, Byoung-Wan et al. | Tema Archive | 2005


    Hydroelastic behaviour of a very large mobile offshore structure in waves

    Takagi, K. / Yano, W. / University of Oxford | British Library Conference Proceedings | 2003