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    기술보고서 게시판 내용
    타이틀 Integrated Structural/Acoustic Modeling of Heterogeneous Panels
    저자 Bednarcyk, Brett, A.;; Aboudi, Jacob;; Arnold, Steven, M.;; Pennline, James, A.
    Keyword ACOUSTIC ATTENUATION;; ANISOTROPIC FLUIDS;; DYNAMIC RESPONSE;; ELASTIC WAVES;; FLUID BOUNDARIES;; HETEROGENEITY;; IMPACT LOADS;; SANDWICH STRUCTURES;; TIME DEPENDENCE
    URL http://hdl.handle.net/2060/20120015478
    보고서번호 NASA/TM-2012-217728
    발행년도 2012
    출처 NTRS (NASA Technical Report Server)
    ABSTRACT A model for the dynamic response of heterogeneous media is presented. A given medium is discretized into a number of subvolumes, each of which may contain an elastic anisotropic material, void, or fluid, and time-dependent boundary conditions are applied to simulate impact or incident pressure waves. The full time-dependent displacement and stress response throughout the medium is then determined via an explicit solution procedure. The model is applied to simulate the coupled structural/acoustic response of foam core sandwich panels as well as aluminum panels with foam inserts. Emphasis is placed on the acoustic absorption performance of the panels versus weight and the effects of the arrangement of the materials and incident wave frequency.

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