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논문 기본 정보

자료유형
학술저널
저자정보
R. Ohayon (Conservatoire National des Arts et Metiers) C. Soize (Université Paris-Est)
저널정보
한국항공우주학회 International Journal of Aeronautical and Space Sciences International Journal of Aeronautical and Space Sciences Volume.13 Number.2
발행연도
2012.6
수록면
127 - 153 (27page)

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This paper presents an advanced computational method for the prediction of the responses in the frequency domain of general linear dissipative structural-acoustic and fluid-structure systems, in the low-and medium-frequency do mains and this includes uncertainty quantification. The system under consideration is constituted of a deformable dissipative structure that is coupled with an internal dissipative acoustic fluid. This includes wall acoustic impedances and it is surrounded by an infinite acoustic fluid. The system is submitted to given internal and external acoustic sources and to the prescribed mechanical forces. An efficient reduced-order computational model is constructed by using a finite element discretization for the structure and an internal acoustic fluid. The external acoustic fluid is treated by using an appropriate boundary element method in the frequency domain. All the required modeling aspects for the analysis of the medium-frequency domain have been introduced namely, a viscoelastic behavior for the structure, an appropriate dissipative model for the internal acoustic fluid that includes wall acoustic impedance and a model of uncertainty in particular for the modeling errors. This advanced computational formulation, corresponding to new extensions and complements with respect to the state-of-the-art are well adapted for the development of a new generation of software, in particular for parallel computers.

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Abstract
1. Introduction
2. Statement of the Problem in the Frequency Domain
3. External Inviscid Acoustic Fluid Equations
4. Internal Dissipative Acoustic Fluid Equations
5. Structure Equations
6. Boundary Value Problem in Terms of {u, p}
7. Computational Model
8. Reduced-Order Computational Model
9. Uncertainty Quantification
10. Symmetric Boundary Element Method Without Spurious Frequencies for the External Acoustic Fluid
11. Conclusion
References

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UCI(KEPA) : I410-ECN-0101-2013-558-003531937