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The Application of Idealization and Response Analysis to Diesel Engine Noise Assessment
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English
Abstract
A method of determining the contributions to noise radiated by a diesel engine using idealization and response analysis is described. An idealization of the engine surface as a set of flat plates is used to calculate radiation efficiency from physical properties and edge constraints of each plate, and the velocity response of the engine surface is measured using accelerometers. This data is used in a simple acoustical power relationship to determine 1/3 octave sound pressure levels under free field conditions for the engine and individual noise sources on the engine. The theory is discussed and an example of the application of the method is given, and compared briefly with the more traditional noise source identification technique of lead cladding.
Authors
Citation
Yorke, P., "The Application of Idealization and Response Analysis to Diesel Engine Noise Assessment," SAE Technical Paper 750836, 1975, https://doi.org/10.4271/750836.Also In
References
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- Priede T. “Relation Between Form of Cylinder Pressure Diagram and Noise in Diesel Engines” Proc. I.M.E. Automobile Division 1960-61 63 67 78 97
- Hawkins M.G. Southall R. “Analysis and Prediction of Engine Structure Vibration” S.A.E. Off Highway Vehicle Meeting September 1975
- Wallance C.E. “Radiation Resistance of a Rectangular Plate” Journal of the Acoustical Society of America 51 3 1972 949 952
- Szchenyi C.A. “Current Developments in Sonic Fatigue” A conference held at I.S.V.R. University of Southampton 6-9th July 1970 “Approximate methods for Determination of Natural Frequencies and Normal Modes of Stiffened, Flat and Curved Plates”
- Berg Per-Ake “Estimation Methods of Sound Radiation from Diesel Engine Installations in Ships and Prediction of their Noise Reducing Possibilities” C.I.M.A.C 1973