This paper presents an optimization method for concept design state of passenger ship with focus on utilisation of efficient Finite Element Modelling, evolutionary optimisation algorithm and indirect constraint relaxation. The response is analysed using 3D coarse mesh global finite element (FE) model, where stiffened panels are modelled using equivalent single layer (ESL) elements and the primary stiffeners are modelled with offset beam elements. The simplifications on stiffened panels and beams enable exploration of design space without changing the FE-mesh. The strength is defined based on classification society rules. Local stress peaks are allowed to exceed the rule-based strength limits, i.e. stress constraints are relaxed indirectly. Instead of increasing the allowed stress levels, the amount of material exceeding strength criteria is utilised. Optimization is based on Particle Swarm Optimization (PSO) algorithm with objective to reduce steel weight. The results show that stress relaxation has significant effect on the obtained total mass.


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    Titel :

    Optimisation of passenger ship structures in concept design stage


    Beteiligte:
    Raikunen, Joni (Autor:in) / Avi, Eero (Autor:in) / Remes, Heikki (Autor:in) / Romanoff, Jani (Autor:in) / Lillemäe-Avi, Ingrit (Autor:in) / Niemelä, Ari (Autor:in)

    Erschienen in:

    Ships and Offshore Structures ; 14 , sup1 ; 320-334


    Erscheinungsdatum :

    03.10.2019


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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