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Finite Element Calculations of the Interior Noise of the Saab 340 Aircraft
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English
Abstract
The complex behaviour of a fuselage-cavity system in a modern propeller aircraft has been analysed with the finite element method. In the analysis the interaction between the fluid and the structure has been taken into account in a physical coupling formulation. The results obtained show that, at some frequencies, this coupling is very important for the vibro-acoustic system response.
The eigenfrequencies and eigenmodes of the fuselage-cavity found in the analysis are compared with experimental modal analysis on a mock-up of the aircraft. The agreement is very good from 10-130 Hz. Especially the modes with strong coupling are well pronounced in the experiments.
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Citation
Göransson, P., "Finite Element Calculations of the Interior Noise of the Saab 340 Aircraft," SAE Technical Paper 891081, 1989, https://doi.org/10.4271/891081.Also In
References
- Göransson P. ASKA-Acoustics Theory and Applications
- Pope L. D. Wilby E.G. Wilby J. F. 1987 J. Sound and Vibration 118 3 449 467 Propeller aircraft interior noise model, Part I: Analytical model
- ASKA User Manual Saab-Scania/IKOSS, Saab Aerospace Division Linköping, Sweden
- Sandberg G. Göransson P. A Symmetric Finite Element Formulation for Acoustic Fluid-Structure Interaction Analysis JSV 123 2 1988