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    Wyświetlanie 1-3 z 3
    Tytuł:
    Stability analysis of the floating offshore wind turbine support structure of CELL SPAR type during its installation
    Autorzy:
    Dymarski, Paweł
    Dymarski, Czesław
    Ciba, Ewelina
    Powiązania:
    https://bibliotekanauki.pl/articles/258528.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    towing and installation of SPAR platforms
    anchoring of SPAR type platforms
    calculation of dynamic loads in anchor ropes
    Opis:
    The article presents the results of selected works related to the wider subject of the research conducted at the Faculty of Ocean Engineering and Ship Technology of the Gdansk University of Technology, which concerns design and technology of construction, towing, and settlement on the seabed, or anchoring, of supporting structures for offshore wind farms. As a result of this research, several designs of this type of objects were developed, including two stationary types: gravitational and Jack-up, which are placed on the seabed, and two floating types: TLP and SPAR, anchored with tendons and anchors in the form of nailed or suction piles. Below presented is the stability analysis of the new floating CELL SPAR type support structure for offshore wind turbines during its installation in waters with a depth of over 65 m.
    Źródło:
    Polish Maritime Research; 2019, 4; 109-116
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental study of the nonlinear behaviour of deep-sea mooring polyester fibre ropes
    Autorzy:
    Zhang, He
    Zeng, Ji
    Jin, Bowen
    Chou, Chiate
    Li, Hangyu
    Dong, Hailei
    Powiązania:
    https://bibliotekanauki.pl/articles/34611198.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    polyester fibre ropes
    static stiffness
    creep coefficient
    long-term cyclic loads
    dynamic stiffness
    Opis:
    Mooring ropes are essential components of ships and offshore floating structures and they are subjected to cyclic axial loads. This study investigates the evolution of the full-cycle stiffness of fibre polyester ropes under long-term static and dynamic loading. First, the static stiffness characteristics of the ropes, including the rope elongation properties at different stages, shrinkage rates, and creep coefficients after an idle period, are examined under static loads; an empirical formula for static stiffness is established. Second, the dynamic stiffness characteristics of the ropes are investigated under cyclic loads that are typical of platform production operations. The stabilities of the structure under different tensions are compared; the effects of mean tension, tension amplitude, and load cycle on the dynamic stiffness of the ropes are analysed and an empirical formula is established to predict the dynamic stiffness during the engineering design phase. The results of this study can be helpful for the rational design of deep-sea taut-leg mooring systems because they present the evolution of the full-cycle stiffness characteristics of mooring ropes.
    Źródło:
    Polish Maritime Research; 2023, 3; 153-162
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On long-term prediction of stresses in principal members of ship hull structures. Current report
    Autorzy:
    Bogdaniuk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/259393.pdf
    Data publikacji:
    2004
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Rules for classification of ships
    spactral analysis of wave loads on ships
    dynamic stresses in ship hull structures
    Opis:
    The paper presents a discussion on the strength criteria and load cases required in the rules of classification societies for direct FEM strength analysis of ship hull structures, which show some differences to each other. The conclusion of it is that detail studies on stress values in ship structures are necessary to improve the requirements. With this end in view an effective method for long-term prediction of stresses in ship hull structure princiŹpal members is proposed. The method is based on the concept of influence coefficients and spectral analysis of wave loads. A FEM model of the principal member system in the form of 3D frame is applied to calculate values of the influence coefficients. Next, the concept is used of correlaŹtion factors for combining characteristic long-term stress values caused by global and local loads, with combined stresses due to general bending of the ship, zone bending of the principal members and local bending of longitudinals. As an example, results of stress prediction and correlation factors calculated in some points of hull structure of a panamax bulk carrier are presented and discussed.
    Źródło:
    Polish Maritime Research; 2004, 3; 3-6
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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