Semiactive control of a fixed offshore jacket platform using linear quadratic regulator (LQR) control algorithm is presented for deepwater conditions. The control devices are the semiactive hydraulic dampers (SHDs), installed in the bracings of the jacket structure. The optimum choice of the damping coefficient of the dampers is generated based on a law that considers variable values of the damping coefficients subjected to specified upper and lower bounds. The response quantities of interest, which are targeted for control, include acceleration and displacement of the deck, and the base shear. A four-legged steel jacket platform in a water depth of 183 m (600 ft) and under two sea states is considered as an example problem for finding out the controlled responses. The results of the parametric study indicate that significant reductions in the peak values of response quantities of interest can be achieved by semiactive control, using SHDs.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Semiactive control of a fixed offshore jacket platform using LQR algorithm


    Contributors:
    Sudip, Paul (author) / TK, Datta (author)


    Publication date :

    2013-11-01


    Size :

    14 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Reliability of fixed offshore jacket platform against earthquake collapse

    Elsayed, T. / El-Shaib, M. / Gbr, K. | Taylor & Francis Verlag | 2016



    In-place analysis for pile structural response of fixed jacket offshore platform

    Abdel Raheem, Shehata E. / Abdel Aal, Elsayed M. / AbdelShafy, Aly G. A. et al. | Taylor & Francis Verlag | 2022


    Optimization of fixed offshore jacket platforms using optimality criteria

    Yadava, R. S. S. / Gurujee, C. S. / Central Water and Power Research Station | British Library Conference Proceedings | 1995