Structural models are usually tested by comparing their responses with those of an actual structure or a very detailed model to a limited number of loads that simulate service loads. However, in some cases (e.g., in the design of some automotive structures), these loads can be arbitrary because there is little information about the actual service loads possibly leading to unreliable results. An antioptimization-based method is proposed for designing numerical or actual experiments to a) test a structural model and b) compare alternative structural models. This method compares a structural model with a reference model or an actual structure under the worst loading case that maximizes the error in the model. The method identifies the loading case that maximizes the difference between the response of two models of the same structure (where one is a reference model) using antioptimization. The proposed antioptimization-based method can be employed also to identify damage in a structure by determining the load that maximizes the difference in the responses of a damaged structure and the intact version of this structure. The proposed method is illustrated by applying it to compare alternate models of an automotive structure and to identify damage in a composite plate.


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    Title :

    Antioptimization for comparison of alternative structural models and damage detection


    Additional title:

    Eine Antioptimierungsmethode zum Vergleich von alternativen Strukturmodellen und zur Schadensdetektion


    Contributors:
    Gangadharan, S.N. (author) / Nikolaidis, E. (author) / Lee, K. (author) / Haftka, R.T. (author) / Burdisso, R. (author)

    Published in:

    AIAA Journal ; 37 , 7 ; 857-864


    Publication date :

    1999


    Size :

    8 Seiten, 6 Bilder, 2 Tabellen, 35 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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