Numerical Simulations in Room Acoustics Using Direct Coupling Techniques and Finite Elements

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9783832531393: Numerical Simulations in Room Acoustics Using Direct Coupling Techniques and Finite Elements
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This thesis presents a coupling approach for time-harmonic problems in linear room acoustics. Therein the closed acoustic system is subdivided into air, sound source and different boundary components. The sound field of each air component is approximated with the help of modal basis functions and continuous transitions between single components are enabled by enforcing coupling conditions. Coupling to realistic boundary conditions is realized by wavenumber- and frequency-dependent impedance functions for plate-like sound absorbers. Afterwards the solution is computed by minimizing the energy based on Hamilton's Principle. For computing the basis functions and the energies of the components the Spectral Finite Element Method and the adapted Patch Recovery Method are applied. Finally numerical benchmark-simulations show the applications of this coupling approach.

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Pospiech, Martina
Published by Logos Verlag Berlin (2012)
ISBN 10: 3832531394 ISBN 13: 9783832531393
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Martina Pospiech
Published by Logos Verlag Berlin (2012)
ISBN 10: 3832531394 ISBN 13: 9783832531393
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