Calculation of Coupled Modes for Vibro-Acoustic Problems


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A new numerical method for the study of elasto-acoustic structures coupled with fluid-filled cavities has been developed. This method essentially consists of solving the eigenvalue problem for the determination of elasto-acoustic modes. The Numerical methods commonly used for its resolution is based on the mass coupling. However, this approach requires for it is resolution the inversion of a singular matrix, "the stiffness matrix of the fluid". We then propose a new numerical method based on stiffness coupling by using modal superposition techniques through a change of variable which shows a symmetric and regular problem in terms of displacement of the elastic structure and in terms of fluid pressure in the cavity.



Advanced Materials Research (Volumes 488-489)

Edited by:

Wu Fan




M. Beldi and Z. Lamia, "Calculation of Coupled Modes for Vibro-Acoustic Problems", Advanced Materials Research, Vols. 488-489, pp. 1691-1696, 2012

Online since:

March 2012





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