Crashworthiness design optimization problems are continuously challenged by inherent complexity of long simulation time, numerical instability, and unavailability of sensitivity analysis. In recent years, surrogate-model-based design optimization using design of experiments and response surface methodology has proven to be a promising way to achieve the improved design for crashworthiness problems. However, the method is still hampered by a large number of function evaluations for a large number of design variables or low accuracy for small sample size. This paper presents an effective simulationbased optimization algorithm for optimal design of large-scale, computationally expensive crashworthiness problems. The proposed optimization algorithm is called the sequential regularized multiquadric regression with output space mapping (SRMQ/OSM). The proposed method is demonstrated on two simple numerical problems and is subsequently extended to a generic helicopter skid landing gear optimization problem to improve the energy absorption efficiency with prescribed design constraints. The results show that the proposed approach converged quickly to a feasible design with no constraint violation. The improved skid gear design obtained by the proposed SRMQ/OSM method exhibits better impact performance in terms of energy absorption, peak acceleration, onset rate, and pulse duration.


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    Titel :

    An effective crashworthiness design optimization methodology to improve helicopter landing gear energy absorption


    Weitere Titelangaben:

    Ein effektives Entwurfsverfahren für die optimierte Aufprallenergieaufnahme von Hubschrauberfahrgestellen


    Beteiligte:
    Tho, Cheng-Ho (Autor:in) / Wang, B.P. (Autor:in)

    Erschienen in:

    Journal of the American Helicopter Society ; 54 , 4 ; 042003/1-042003/12


    Erscheinungsdatum :

    2009


    Format / Umfang :

    12 Seiten, 13 Bilder, 1 Tabelle, 20 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    An Effective Crashworthiness Design Optimization Methodology to Improve Helicopter Landing Gear Energy Absorption

    Tho, C. H. / Wang, B. P. / AHS International | British Library Conference Proceedings | 2007



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    V. Giavotto / C. Caprile / G. Sala | NTIS | 1988