Modal Expansion of Experimental Vibration Data for Numerical Acoustic Radiation Prediction 951090
The prediction of the acoustic radiation of vibrating structures is traditionally based on the acoustic boundary element method. This approach leads to good predictions, provided that the dynamic behavior of the system is well known. This paper presents the integration of experimental vibration analysis with numerical acoustic radiation prediction. The developed methodology involves several steps: (i) measure the accelerations on the surface of a vibrating body, (ii) expand these experimental data onto a numerical model, using the modal information of a finite element model, and (iii) run a boundary element analysis to determine the acoustic radiated field.
This procedure presents the advantages that the dynamic behavior is as accurately as possible defined and that the boundary element approach opens wide results interpretation (contribution and sensitivity analysis…). A real-life application example (car engine) is shown to illustrate and validate the developed methodology.
Citation: Guisset, P. and Brughmans, M., "Modal Expansion of Experimental Vibration Data for Numerical Acoustic Radiation Prediction," SAE Technical Paper 951090, 1995, https://doi.org/10.4271/951090. Download Citation
Author(s):
Pierre Guisset, Marc Brughmans
Pages: 6
Event:
International Conference On Vehicle Structural Mechanics & Cae
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Proceedings of the Ninth International Conference on Vehicle Structural Mechanics and Cae-P-290
Related Topics:
Radiation
Acoustics
Vibration
Vehicle acceleration
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