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Acoustic Modeling and Radiated Noise Prediction for Plastic Air-Intake Manifolds
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 05, 2003 by SAE International in United States
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Reliable prediction of the radiated noise due to the air pressure pulsation inside air-intake manifolds (AIM) is of significant interest in the automotive industry. A practical methodology to model plastic AIMs and a prediction process to compute the radiated noise are presented in this paper. The measured pressure at the engine inlet valve of an AIM is applied as excitation on an acoustic boundary element model of the AIM in order to perform a frequency response analysis. The measured air pressure pulsation is obtained in the crank-angle domain. This pressure is read into MATLAB and transformed into the frequency domain using the fast Fourier transform. The normal modes of the structure are computed in ABAQUS and a coupled analysis in SYSNOISE is launched to couple the boundary element model and the finite element model of the structure. The computed surface vibration constitutes the excitation for an acoustic uncoupled boundary element analysis. The numerical results of the radiated noise from the manifold are obtained from this uncoupled analysis. A special technique is used to prevent the radiated noise from being contaminated by the inlet noise.
CitationHu, K., Lee, C., Homsi, E., and Moenssen, D., "Acoustic Modeling and Radiated Noise Prediction for PlasticAir-Intake Manifolds," SAE Technical Paper 2003-01-1448, 2003, https://doi.org/10.4271/2003-01-1448.
- Lee K. H., “A Study on the Influence of Plastic Intake Manifold on the Performance and NVH of In-line 4 Cylinder Gasoline Engine”, SAE 980728
- Lee C., Hu K., Homsi E. and Moenssen D., “A Practical Approach for Computing Air-Intake Manifold Radiated Noise”, 2002 LMS Conference for Physical and Virtual Prototyping, Troy, MI (Oral only).
- Ciskowski R. D. and Brebbia C. A., editors, “Boundary Element Methods in Acoustics”, Computational Mechanics Publications, 1991.
- Seybert A. F., Soenarco B., Rizzo F. J. and Shippy D. J., “Application of the BIE Method to Sound Radiation Problem Using an Isoparametric Element”, Journal of Vibration, Acoustics, Stress, and Reliability in Design 106, pp. 414-419,1984.
- Coyette J. P. and Fyfe K. R., “Solution of Elasto-Acoustic Problems Using a Variational Finite Element/Boundary Element Technique”, Proceedings, Numerical Techniques in Acoustic Radiation, Winter Annual Meeting of ASME, San Francisco, CA, pp. 15-25, 1989.
- Vlahopoulos N. and Raveendra S. T., “Formulation, Implementation and Validation of Multiple Connection and Free Edge Constraints in an Indirect Boundary Element Formulation”, Journal of Sound and Vibration 210(1), pp. 137-152, 1998.
- SYSNOISE Rev 5.3 User's Manual