Structural partitioning of complex structures in the medium-frequency range. An application to an automotive vehicle

• Published in: Journal of sound and vibration Vol. 330; no. 5; pp. 937 - 946
• Main Authors: Kassem, M., Soize, C., Gagliardini, L.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 28.02.2011; Elsevier
• Subjects: Acoustics; Automobiles; Automotive components; Automotive engineering; Construction equipment; Engineering Sciences; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Mathematics; Mechanics; Partitioning; Physics; Probability; Simplification; Sound; Structural acoustics and vibration; Vibration; Vibrations; Energy method; Motor car; Medium frequency; Vibration; Periodic medium; Energy density; Low frequency; Modeling; Structural acoustics; Structural analysis; EXPERIMENTAL VALIDATION; VIBROACOUSTIC ANALYSIS; BUILT-UP SYSTEMS; UNCERTAINTIES; STATISTICAL ENERGY ANALYSIS; EXPERIMENTAL IDENTIFICATION; VIBRATION ANALYSIS; VARIANCE PREDICTION; MODEL; SEA
• ISSN: 0022-460X; 1095-8568
• DOI: 10.1016/j.jsv.2010.09.008

In a recent work [ Journal of Sound and Vibration 323 (2009) 849–863] the authors presented an energy-density field approach for the vibroacoustic analysis of complex structures in the low and medium frequency ranges. In this approach, a local vibroacoustic energy model as well as a simplification of this model were constructed. In this paper, firstly an extension of the previous theory is performed in order to include the case of general input forces and secondly, a structural partitioning methodology is presented along with a set of tools used for the construction of a partitioning. Finally, an application is presented for an automotive vehicle.