Practical Considerations in Reconstructing the Surface Vibration Using Inverse Numerical Acoustics 2003-01-1456
This paper explores the use of inverse numerical acoustics to reconstruct the surface vibration of a noise source. Inverse numerical acoustics is mainly used for source identification. This approach uses the measured sound pressure at a set of field points and the Helmholtz integral equation to reconstruct the normal surface velocity. The number of sound pressure measurements is considerably less than the number of surface vibration nodes. A brief guideline on choosing the number and location of the field points to provide an acceptable reproduction of the surface vibration is presented. The effect of adding a few measured velocities to improve the accuracy will also be discussed. Other practical considerations such as the shape of the field point mesh and effect of experimental errors on reconstruction accuracy will be presented. Examples will include a diesel engine and a transmission housing.
Citation: Martinus, F., Herrin, D., and Seybert, A., "Practical Considerations in Reconstructing the Surface Vibration Using Inverse Numerical Acoustics," SAE Technical Paper 2003-01-1456, 2003, https://doi.org/10.4271/2003-01-1456. Download Citation
Author(s):
F. Martinus, D. W. Herrin, A. F. Seybert
Affiliated:
University of Kentucky
Pages: 10
Event:
SAE 2003 Noise & Vibration Conference and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Automotive Microcontrollers, Volume 2-PT-137, SAE 2003 Transactions Journal of Passenger Cars - Mechanical Systems-V112-6
Related Topics:
Diesel / compression ignition engines
Acoustics
Vibration
Identification
Noise
Transmissions
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »