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Structural and Multidisciplinary Optimization

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01.02.2013 | Research Paper

Microstructural topology optimization with respect to sound power radiation

verfasst von: Ruizhen Yang, Jianbin Du

Erschienen in: Structural and Multidisciplinary Optimization | Ausgabe 2/2013

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Abstract

The paper deals with the problem of topological design of microstructure with respect to minimization of the sound power radiation from a vibrating macrostructure. The macrostructure is excited at a single or a band of excitation frequencies by a time-harmonic mechanical loading with prescribed amplitude and spatial distribution. The structural damping is considered to be proportional damping. The sound power is calculated using a high frequency approximation formulation and thus the sensitivity analysis may be performed in a very efficient manner. The microstructure composed of two different solid isotropic materials is assumed to be identical from point to point at the macro-level which implies that the interface between the structure and the acoustic medium is unchanged during the design process. The equivalent material properties of the macrostructure are calculated using homogenization method and the bi-material SIMP model is employed to achieve zero-one design at the micro-scale. Numerical examples are given to validate the model developed. Some interesting features of acoustic microstructure topology optimization are revealed and discussed.

Vorheriger Artikel Comparison study between probabilistic and possibilistic methods for problems under a lack of correlated input statistical information

Nächster Artikel Multi-objective design method based on evolution game and its application for suspension

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Titel: Microstructural topology optimization with respect to sound power radiation
verfasst von: Ruizhen Yang
Jianbin Du
Publikationsdatum: 01.02.2013
Verlag: Springer-Verlag
Erschienen in: Structural and Multidisciplinary Optimization / Ausgabe 2/2013
Print ISSN: 1615-147X
Elektronische ISSN: 1615-1488
DOI: https://doi.org/10.1007/s00158-012-0838-9

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