A global-local optimization method for problems in structural dynamics

J.W. Wind

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    1 Citation (Scopus)
    18 Downloads (Pure)

    Abstract

    The optimization of complex structures involving many design variables and constraints can be performed using a multi-level approach: a structure consisting of several components is optimized as a whole (global) and on the component level (local). Earlier work [1], [2], [3], described a multilevel technique developed for the optimization the Airbus A380 vertical tail plane. In this application, a global model is used to calculate the loads on each of the components. These components are then optimized using the prescribed loads, followed by a new global calculation to update the loads. The component optimization strategy is based on Neural Networks (NN) and Genetic Algorithms (GA).
    This paper describes a strategy that makes this global-local optimization method possible for problems in structural dynamics. It is established that a parametrization of the component interactions (e.g. component loads) is problematic due to frequency dependence. Hence, a modified method is proposed in which the speed of Component Mode Synthesis (CMS) is used to avoid this parametrization. The effectiveness of this method is demonstrated in a test case concerning the placement of sensor and actuator locations in Active Structural Acoustic Control (ASAC). Special attention is paid to the behavior of the optimization strategy.
    Original languageEnglish
    Title of host publication25th Congress of the International Council of the Aeronautical Sciences, ICAS 2006
    Subtitle of host publication3-8 September 2006, Hamburg, Germany
    EditorsI. Grant
    Place of PublicationEdinburgh, UK
    PublisherOptimpage Ltd.
    Number of pages10
    ISBN (Print)9781604232271, 9780953399178
    Publication statusPublished - 2006
    Event25th Congress of the International Council of the Aeronautical Sciences, ICAS 2006 - Hamburg, Germany
    Duration: 3 Sep 20068 Sep 2006
    Conference number: 25
    https://www.icas.org/ICAS_ARCHIVE/ICAS2006/index.html

    Conference

    Conference25th Congress of the International Council of the Aeronautical Sciences, ICAS 2006
    Abbreviated titleICAS
    CountryGermany
    CityHamburg
    Period3/09/068/09/06
    Internet address

    Keywords

    • Panels
    • Sound
    • Transmission
    • Resonators

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  • Cite this

    Wind, J. W. (2006). A global-local optimization method for problems in structural dynamics. In I. Grant (Ed.), 25th Congress of the International Council of the Aeronautical Sciences, ICAS 2006: 3-8 September 2006, Hamburg, Germany [034] Edinburgh, UK: Optimpage Ltd..