Open Access

ARTICLE

Sound Power Radiation Sensitivity and Variability Using a 'Hybrid' Numerical Model

Max de Castro Magalhaes¹

1 Corresponding author, E-mail: maxdcm@gmail.com. Department of Structural Engineering, Federal University of Minas Gerais, Belo Horizonte 31270901, Brazil

Computer Modeling in Engineering & Sciences 2012, 89(4), 263-281. https://doi.org/10.3970/cmes.2012.089.263

Abstract

The main objective is to develop a 'hybrid' numerical method for predicting sound power radiated from honey-comb panels and analyze the sensitivity and variability of it to different boundary conditions. The honey-comb panels are mainly used on the aerospace, mechanical and civil engineering design. The method used herein is a combination of the Finite Element Method and the Jinc Function Approach. The original contribution of this paper is therefore to show the sensitivity of sound power radiated from a honey-comb panel using a 'hybrid' method which is simple and efficient on tackling sound radiation problems for complex orthotropic panels, especially during the design process. It is believed that this is the first time honey-comb panels have been investigated in terms of sound radiation efficiency using this method. Some background information about the 'hybrid' method is provided as a basis for assisting the understanding of the process. The results obtained using 'typical' boundary conditions, i.e. simply-supported, clamped and free boundaries, are compared to those obtained using more complex boundary conditions which are based on pinned points randomly located along the panel boundary. Finally, conclusions are drawn based on the analysis of the results and the extension to alternative acoustic systems

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Keywords

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