TY - GEN
T1 - Prediction of sound fields in acoustic cavities coupled to absorptive structures due to vibrating surfaces
AU - Buchschmid, Martin
AU - Müller, Gerhard
AU - Pospiech, Martina
PY - 2013
Y1 - 2013
N2 - In the scope of this contribution a model for the Fluid Structure Interaction (FSI) is presented, where absorptive structures can be considered. A special focus is layed on the interface coupling modes between absorber and fluid. For the simulation of the spatial resolution of the sound field within acoustic cavities techniques based on Finite Element formulations are used. To reduce the number of degrees of freedom a model reduction method, based on a Component Mode Synthesis (CMS), is applied. The cavity boundary conditions, e.g. compound absorbers made of homogenous plates and porous foams, are modeled using Integral Transform Methods (ITM) and appropriate material formulations. Wavenumber dependent impedances are computed for the absorptive structure and used for the coupling with the acoustic cavity adding interface coupling modes for the fluid and applying Hamilton's principle.
AB - In the scope of this contribution a model for the Fluid Structure Interaction (FSI) is presented, where absorptive structures can be considered. A special focus is layed on the interface coupling modes between absorber and fluid. For the simulation of the spatial resolution of the sound field within acoustic cavities techniques based on Finite Element formulations are used. To reduce the number of degrees of freedom a model reduction method, based on a Component Mode Synthesis (CMS), is applied. The cavity boundary conditions, e.g. compound absorbers made of homogenous plates and porous foams, are modeled using Integral Transform Methods (ITM) and appropriate material formulations. Wavenumber dependent impedances are computed for the absorptive structure and used for the coupling with the acoustic cavity adding interface coupling modes for the fluid and applying Hamilton's principle.
KW - Component mode synthesis
KW - Fluid structure interaction
KW - Integral transform methods
KW - Room acoustics
UR - http://www.scopus.com/inward/record.url?scp=84906891006&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84906891006
SN - 9788494140761
T3 - Computational Methods for Coupled Problems in Science and Engineering V - A Conference Celebrating the 60th Birthday of Eugenio Onate, COUPLED PROBLEMS 2013
SP - 720
EP - 731
BT - Computational Methods for Coupled Problems in Science and Engineering V - A Conference Celebrating the 60th Birthday of Eugenio Onate, COUPLED PROBLEMS 2013
PB - International Center for Numerical Methods in Engineering
T2 - 5th International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2013
Y2 - 17 June 2013 through 19 June 2013
ER -