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Global Acoustic Sensitivity Analysis Applied to the Reduction of Shell Noise Radiation of a Simulated Engine Air Induction System Component
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 23, 1998 by SAE International in United States
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Global acoustic sensitivity analysis  is a technique used to identify structural modifications to a component that can reduce the total radiated power of a vibrating structure or the sound pressure levels at specified field points. This report describes the use of global sensitivity analysis within SYSNOISE to determine what structural changes are required to reduce radiated noise from flexible structures in an open duct system. The technique can help optimize design parameters that define the behavior of a flexible structure such as shell thickness and Young's Modulus. The sensitivity analysis approach consists of separately evaluating structural and acoustic sensitivities. A structural finite element model (FEM) of an open duct system is used to compute the sensitivity of the structural response to changes in thickness. A boundary element model (BEM) is then used to relate changes in the calculated acoustic response to changes in the structural design variables.
This paper includes both a baseline design and a revised design to demonstrate global sensitivity analysis. The development of sensitivity methodology allows for optimizing structural-acoustic design of engine air induction systems.
CitationLin, J. and Kostun, J., "Global Acoustic Sensitivity Analysis Applied to the Reduction of Shell Noise Radiation of a Simulated Engine Air Induction System Component," SAE Technical Paper 980280, 1998, https://doi.org/10.4271/980280.
- Coyette Jean-Pierre Dr. Guisset Pierre von Estorff Otto Dr. “The Use of MSA/NASTRAN and SYSNOISE for Evaluating Global Acoustic Sensitivities of a Vibrating Structure,” European Users Conference Austria Sept. 1993
- SYSNOISE Numerical Integration Technologies Belgium 1996
- Ciskowski R. D. Brebbia C. A. “Boundary Element Methods in Acoustics,” Computational Mechanics Publications 1991
- Kostun John D. Lin J. S. “Prediction of Shell Noise Radiation of simulated Engine Air Induction System Components Using Boundary Element Analysis,” 1995 International Mechanical Engineering Congress & Exposition San Francisco, Cal.
- Moore Gregory J. “MSC/NASTRAN Design Sensitivity and Optimization User's Guide, Version 68,” The Macneal-Schwendler Corporation May 1994
- Sokolnikoff I. S. Redheffer R. M. “Mathematics and Physics and Modern Engineering, @nd Edition,” McGraw Hill Book Company, Inc. New York
- Leonard Meirovitch “Analytical Methods in Vibrations,” The Macmillan Company 1997