Skip to Main content Skip to Navigation
Journal articles

Reduced models in the medium frequency range for general external structural-acoustics systems

Abstract : This paper presents a theoretical approach for constructing a reduced model in the medium-frequency range in the area of structural acoustics for a general three-dimensional dissipative structure made of an anisotropic, inhomogeneous, viscoelastic bounded medium coupled with an external acoustic fluid. All the results presented can be used if the structure is made of beams, plates and shells. The boundary value problem in the frequency domain and its variational formulation are presented. For a fixed medium-frequency band, an energy operator related to the structural-acoustic system is introduced. This operator is symmetric positive definite and has a countable set of positive eigenvalues. Its dominant eigensubspace allows a reduced model to be constructed using the Ritz-Galerkin method. The theory is validated for a finite length circular cylindrical shell coupled with several dashpots and springs and immersed in a gas (air) and in a liquid (water).
Complete list of metadatas

Cited literature [14 references]  Display  Hide  Download

https://hal-upec-upem.archives-ouvertes.fr/hal-00765803
Contributor : Christian Soize <>
Submitted on : Sunday, December 16, 2012 - 10:41:46 PM
Last modification on : Friday, June 26, 2020 - 2:00:04 PM
Long-term archiving on: : Sunday, March 17, 2013 - 3:50:49 AM

File

publi-1998-JASA-103_6_3393-340...
Files produced by the author(s)

Identifiers

Collections

Citation

Christian Soize. Reduced models in the medium frequency range for general external structural-acoustics systems. Journal of the Acoustical Society of America, Acoustical Society of America, 1998, 103 (6), pp.3393-3406. ⟨10.1121/1.423052⟩. ⟨hal-00765803⟩

Share

Metrics

Record views

527

Files downloads

162