Simultaneous layout and topology optimization of stiffened panels is investigated in this paper using a new level-set-based method. Specifically, plate elements are used to construct a stiffened panel structure. The level set method is then used to manipulate the stiffener layout, with curved members allowed. A free-form mesh deformation method with a control mesh is used to adjust the finite element mesh. The level set method is also used to optimize the internal topologies of the stiffeners. Both mass minimization with buckling constraint and critical buckling load factor maximization with mass constraint are investigated. A semi-analytical sensitivity analysis is performed, and the optimization algorithm is outlined. For the buckling-constrained problem, the p -norm function is used to aggregate multiple buckling modes and a gradient-based optimizer is used with an adaptive scaling method to enforce exact control of the buckling limit. Numerical investigations demonstrate and validate the proposed method.


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    Titel :

    Simultaneous Layout and Topology Optimization of Curved Stiffened Panels


    Beteiligte:
    Chu, Sheng (Autor:in) / Townsend, Scott (Autor:in) / Featherston, Carol (Autor:in) / Kim, H. Alicia (Autor:in)

    Erschienen in:

    AIAA Journal ; 59 , 7 ; 2768-2783


    Erscheinungsdatum :

    01.07.2021




    Medientyp :

    Aufsatz (Konferenz) , Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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    Chu, Sheng / Townsend, Scott / Featherston, Carol et al. | AIAA | 2020


    SIMULTANEOUS LAYOUT AND TOPOLOGY OPTIMIZATION OF CURVED STIFFENED PANELS

    Chu, Sheng / Townsend, Scott / Featherston, Carol et al. | TIBKAT | 2020


    Simultaneous size, layout and topology optimization of stiffened panels under buckling constraints

    Chu, Sheng / Townsend, Scott / Featherston, Carol et al. | AIAA | 2021


    SIMULTANEOUS SIZE, LAYOUT AND TOPOLOGY OPTIMIZATION OF STIFFENED PANELS UNDER BUCKLING CONSTRAINTS

    Chu, Sheng / Townsend, Scott / Featherston, Carol et al. | TIBKAT | 2021