Acoustoelastic Simulation of Baffled Container Using Boundary Element Method

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Bornassi, Saeed | 2011

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 42293 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Haddadpour, Hassan; Dehghani Firoozabadi, Rouhollah
Abstract:
In this project, the acoustoelastic simulation of baffled cavities using boundary element method is investigated. At first step, the acoustic field for an enclosed rigid cavity with baffle is formulated and then solved by dual reciprocity boundary element method. In order to derive the governing equation, the acoustic domain is considered without mean flow and the fluid is assumed to be compressible and inviscid. Using the developed model and applying the zoning method, behavior and response of baffled cavities are investigated. In order to study the structure_acoustic interaction, modal reduced order model is used to explain the vibration of structure in combination to acoustic field. The acoustic and structure equations are coupled through flux (velocity) at the boundary and pressure at the wall. The flux is related to structure displacement and also pressure to the acoustic potential. Finally some examples are solved to study the effect of structure flexibility on acoustic modal characteristics
Keywords:
Finite Element Method ; Acoustic System ; Baffle ; Elastic Enclosed Cavity ; Modal Reduced Order Model

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