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Noise Radiation Model of a Powertrain Using an Inverse Boundary Element Method and Projection on Wave-Envelope Vectors
Technical Paper
2003-01-1697
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The paper deals with the construction of a powertrain acoustic radiation model to be used as a noise source in acoustic finite or boundary element models. This model results from near-field acoustic measurements of the running powertrain. Transfer functions between the measurement points and a meshed envelope of the powertrain (850 nodes) are calculated using a boundary element model of the powertrain in the test-bench. Wave-Envelope vectors are then used as a projection basis to solve the inverse problem providing flow velocities on the surface of the powertrain model. The quality of the model is assessed by comparing computed and measured sound pressures at specific location, away from the initial measurement points. The original free-field configuration, as well as a confined situation, simulating an under-hood around the powertrain, are examined.
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Citation
Gagliardini, L., Hamdi, M., and Defosse, H., "Noise Radiation Model of a Powertrain Using an Inverse Boundary Element Method and Projection on Wave-Envelope Vectors," SAE Technical Paper 2003-01-1697, 2003, https://doi.org/10.4271/2003-01-1697.Also In
References
- Hamdi M.A. Defosse H. Damagnes F. Gagliardini L. “A Hybrid Analysis-Test Tool based on a novel Inverse Boundary Element Method for the determination of the optimal spectral characteristics of complex radiating noise sources” INTERNOISE 2002 Dearborn, USA
- Bobrovnitskii Y.I. “The problem of vibrating field reconstruction: statement and general properties” 2001 Journal of Sound and Vibration 247 1 145 163
- Hamdi M.A. Defosse H. Gamagnez F. Beauvilain T. Varet P. “Use of Reciprocity Principle in a Hybrid Modelling Technique (HMT) based on Inverse Boundary Element Method (IBEM) for the determination of the optimal spectral characteristics of a complex radiating noise source INTERNOISE 2000 Nice, France
- Maynard J.D. Williams E.G. Lee Y. “Nearfield acoustic holography: I. Theoryof generalized holography and development of NAH” J. Acoust.Soc.Am. 1985 78 4 1395 1413
- Billingsley J. Kinns R. “The Acoustic Telescope” Journal of Sound and Vibration 48 4 485 510 1976
- Tikhonov A.N. Ya Arsenin V. “Solution of ill-posed Problems” 1977 Simon & Schuster Washington DC
- Williams E.G. “Regularization Methods for Nearfield Acoustical Holography” July 2001