This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Prediction and Optimization of radiated sound power and radiation efficiency of vibrating structures using FEM
Technical Paper
2000-01-0726
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
Structure borne sound is one of the most important reasons of noise pollution in the automobiles and aircraft's. Noise is mostly generated by the vibrating panels excited by either a mechanical or an acoustical excitation. Examples of the typical vibrating structures in automobiles are engine cylinder, gearbox cover, transmission system covers, panels of the body etc. Sound radiation characteristics are also important in the phenomenon of resonant sound transmission through a panel. Resonant sound transmission occurs because of resonant modes of the panel within the frequency bandwidth of interest. Typical example of resonant sound transmission is the transmission through a firewall of an automobile, which forms the partition between the engine compartment and the cabin interior. Radiation characteristics can be typically defined by radiated sound power, radiation efficiency and space average mean square velocity of the panel. These radiation characteristics of the panels depend on the distribution of mass, stiffness and damping along the plate. Recent advances in composite technology have enabled the panel designs with complicated distribution of material properties. Design of such panels can be a challenging task since it involves a number of parameters. There can be a large number of feasible solutions with different values of parameters. Several optimization methods can be employed for finding an optimum set of variables which will give minimum value of the objective function.
Citation
Patil, A. and Crocker, M., "Prediction and Optimization of radiated sound power and radiation efficiency of vibrating structures using FEM," SAE Technical Paper 2000-01-0726, 2000, https://doi.org/10.4271/2000-01-0726.Also In
References
- Yildiz A. Stevens K. “Optimum thickness distribution of unconstrained visco-elastic damping layer treatments for plates” Journal of Sound and Vibration 103 183 199 1985
- Olhoff N. “Optimal design of vibrating rectangular plates” International Journal of solid structures 10 93 109 1974
- Cardou A. Warner W. H. “Minimum mass design of sandwich structures with frequency and section structures” Journal of optimization theory and applications 14 6 633 647 1974
- Starkey J. M. Bernhard J. E. “A constraint function technique for improved structural dynamics” Journal of Vibration, Acoustics, Stress and Reliability in Design, ASME Transactions 108 101 106 1986
- Cunefare K. A. Koopmann G. H. “Acoustic design sensitivity for structural radiators” Journal of Vibration and Acoustics, ASME Transactions 114 2 178 186 1992
- Koorosh N. “Strategies for the optimum design of quirt structures: Use of material tailoring and/or active vibration control” Ph.D. thesis The Pennsylvania State University 1991
- Sivakumar J. Shung S. H. Nefske D. J. “Noise reduction of engine component covers using the finite element analysis” ASME Struct. Vibr. Acoustics 24 133 137 1991
- Lamancusa J. S. “Numerical optimization techniques for structural acoustic design of rectangular panels” Journal of Computer and Structures 48 4 661 675 1993
- Wallace C. E. “Radiation resistance of a rectangular panel” Journal of Acoustical Society of America 51 946 952 1972
- Vanderplaats G. N. “CONMIN- a FORTRAN code for optimization” NASA TM X-62.282 1982
- ANSYS theory and analysis manual ANSYS Inc
- Fahy F. “Sound and Structural vibration: Radiation, Transmission and Response” Academic Press London 1985