Reconstruction of a Vibration Field from Acoustical Measurements: A New Inverse Method Based on the Concept of Pellicular Acoustic Modes 2009-01-2209
This paper describes a new approach for performing indirect vibration measurements using acoustic measurements and an inverse calculation procedure based on a finite element model and a new type of hierarchical basis (so-called pellicular modes) for representing the unknown vibration field.
The paper first presents the theory of the method. A parametric study on a simple test case then highlights the effect of the number of microphones and of the background noise level on the quality of the reconstruction of the vibration pattern. The application to a real set of acoustic data on a section of an ATR regional aircraft is then provided.
Citation: Lielens, G., Van Antwerpen, B., and Migeot, J., "Reconstruction of a Vibration Field from Acoustical Measurements: A New Inverse Method Based on the Concept of Pellicular Acoustic Modes," SAE Technical Paper 2009-01-2209, 2009, https://doi.org/10.4271/2009-01-2209. Download Citation
Grégory Lielens, Bernard Van Antwerpen, Jean-Louis Migeot
Free Field Technologies
SAE 2009 Noise and Vibration Conference and Exhibition