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Multiobjective muffler shape optimization with hybrid acoustics modelling

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Airaksinen, T., & Heikkola, E. (2011). Multiobjective muffler shape optimization with hybrid acoustics modelling. Journal Of Acoustical Society of America, 130(3), 1359-1369. https://doi.org/10.1121/1.3621119
Published in
Journal Of Acoustical Society of America
Authors
Airaksinen, Tuomas |
Heikkola, Erkki
Date
2011
Discipline
TietotekniikkaMathematical Information Technology
Copyright
© 2011 Acoustical Society of America

 
This paper considers the combined use of a hybrid numerical method for the modeling of acoustic mufflers and a genetic algorithm for multiobjective optimization. The hybrid numerical method provides accurate modeling of sound propagation in uniform waveguides with non-uniform obstructions. It is based on coupling a wave based modal solution in the uniform sections of the waveguide to a finite element solution in the non-uniform component. Finite element method provides flexible modeling of complicated geometries, varying material parameters, and boundary conditions, while the wave based solution leads to accurate treatment of non-reflecting boundaries and straightforward computation of the transmission loss (TL) of the muffler. The goal of optimization is to maximize TL at multiple frequency ranges simultaneously by adjusting chosen shape parameters of the muffler. This task is formulated as a multiobjective optimization problem with the objectives depending on the solution of the simulation model. NSGA-II genetic algorithm is used for solving the multiobjective optimization problem. Genetic algorithms can be easily combined with different simulation methods, and they are not sensitive to the smoothness properties of the objective functions. Numerical experiments demonstrate the accuracy and feasibility of the model-based optimization method in muffler design. ...
Publisher
Acoustical Society of America
ISSN Search the Publication Forum
0001-4966
Keywords
aaltoputki muodonoptimointi geneettinen algoritmi äärellisten elementtien menetelmä waveguide shape optimization genetic algorithm elementtimenetelmä

Original source
http://dx.doi.org/10.1121/1.3621119

DOI
https://doi.org/10.1121/1.3621119
URI

http://urn.fi/URN:NBN:fi:jyu-2011090611343

Publication in research information system

https://converis.jyu.fi/converis/portal/detail/Publication/20721760

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