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portada Numerical Simulations in Room Acoustics Using Direct Coupling Techniques and Finite Elements
Type
Physical Book
Publisher
Author
Language
English
Pages
141
Format
Paperback
ISBN13
9783832531393

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

Martina Pospiech (Author) · Logos Verlag Berlin · Paperback

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

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

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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