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The Application of Acoustic Radiation Modes to Engine Oil Pan Design
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 05, 2017 by SAE International in United States
Annotation ability available
In modern engine design, downsizing and reducing weight while still providing an increased amount of power has been a general trend in recent decades. Traditionally, an engine design with superior NVH performance usually comes with a heavier, thus sturdier structure. Therefore, modern engine design requires that NVH be considered in the very early design stage to avoid modifications of engine structure at the last minute, when very few changes can be made. NVH design optimization of engine components has become more practical due to the development of computer software and hardware. However, there is still a need for smarter algorithms to draw a direct relationship between the design and the radiated sound power. At the moment, techniques based on modal acoustic transfer vectors (MATVs) have gained popularity in design optimization for their good performance in sound pressure prediction. Since MATVs are derived based on structural modes, they are not independent with respect to radiated sound power. In contrast, acoustic radiation modes are an orthogonal set of velocity distributions on the structure’s surface that contribute to the radiated sound power independently. As a result, it is beneficial to describe structural vibration in terms of acoustic radiation modes in order to identify the velocity distributions that contribute the majority of the radiated sound power. Measures can then be taken to modify the identified vibration patterns to reduce their magnitudes, which will in turn result in an unequivocal reduction of the radiated sound power. A workflow based on multibody dynamic simulation and acoustic radiation modes to optimize an engine oil pan design is demonstrated in this paper.
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CitationLiu, J., Liu, Y., and Bolton, J., "The Application of Acoustic Radiation Modes to Engine Oil Pan Design," SAE Technical Paper 2017-01-1844, 2017, https://doi.org/10.4271/2017-01-1844.
- Gérard F. , Tournour M. , Masri N. and Cremers L. Acoustic Transfer Vectors for Numerical Modeling of Engine Noise Journal of Sound and Vibration 36 7 20 25 2002
- Maressa A. , Pluymers B. and Desmet W. NVH Optimization Methodologies based on Bead Modification Analysis in Vehicle Body Design Proceedings of ISMA2010 -International Conference on Noise and Vibration Engineering Including USD2010 2011
- Marburg S. Efficient optimization of a noise transfer function by modification of a shell structure geometry-Part I: Theory Structural and Multidisciplinary Optimization 24 1 51 59 2002
- Christensen S. , Sorokin S. and Olhoff N. On analysis and optimization in structural acoustics - Part I: Problem formulation and solution techniques Structural Optimization 16 83 95 1998
- Koopmann G. H. and Fahnline J. B. Designing Quiet Structures: A Sound Power Minimization Approach San Diego, California, USA Academic Press 1997
- Costa M. , ., Siano , D. , Valentino , G. , Corcione , F. et al. Prediction and Optimization of the Performances, Noxious Emissions and Radiated Noise of a Light Duty Common-Rail Diesel Engine SAE Technical Paper 2009-24-0011 2009 10.4271/2009-24-0011
- Elliott S. J. and Johnson M. E. Radiation modes and the active control of sound power J. Acoust. Soc. Am. 94 4 2194 2204 1993
- Chessa J. F. Programing the finite element method with matlab Northwestern Univeristy Chicago, IL 2002
- Chen L. iFEM: An innovative finite element methods package in MATLAB University of California at Irvine 2009
- Peters H. , Marburg S. and Kessissoglou N. On the symmetry of the impedance matrix for acoustic radiation modes and sound power evaluation Proceedings of ACOUSTICS Gold Coast, Australia 2011
- Henriquez V. C. and Juhl P. M. OpenBEM-An open source Boundary Element Method software in acoustics Internoise 2010 2010