Loughborough University
Leicestershire, UK
LE11 3TU
+44 (0)1509 263171
Loughborough University

Loughborough University Institutional Repository

Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/9685

Title: Numerical modelling techniques to optimise automotive-type panels for reduced sound radiation
Authors: Walsh, Stephen J.
Kumar, G.
Krylov, Victor V.
Issue Date: 2012
Publisher: © University of Sussex
Citation: WALSH, S.J., KUMAR, G. and KRYLOV, V.V., 2012. Numerical modelling techniques to optimise automotive-type panels for reduced sound radiation. In: Dunne, J.F. (ed.) International Symposium on the Computational Modelling and Analysis of Vehicle Body Noise and Vibration, University of Sussex, Brighton, UK, March 2012, 10pp.
Abstract: Numerical predictions are becoming ever more important in automotive development when analysing the Noise, Vibration and Harshness (NVH) performances of vehicles. In the low- to midfrequency range, vibro-acoustic predictions are generally performed using the finite element method (FEM) and/or boundary element method (BEM). In this paper, a numerical optimisation technique is described that aims at reducing the sound radiation from automotive-type panels over the frequency range of interest. The objective function, i.e. the radiated acoustic power, is calculated with a quadratic equation in terms of surface velocities. The genetic algorithm (GA) based optimisation aims to minimise the value of the objective function by modifying the normaldirection (Z-direction in an X-Y plane) of a few nodes of the finite element model of the panel, thereby imposing a geometrical change in the panel. The equation of an ellipsoid is used to smooth out the discontinuity after the change in the nodal coordinates and, hence, dome-shaped indentations are obtained. The resulting panel designs are analysed, both numerically and experimentally to support the approach presented.
Description: This is a conference paper. Permission to deposit the paper has been granted by the University of Sussex, publishers of the proceedings of the International Symposium on the Computational Modelling and Analysis of Vehicle Body Noise and Vibration, University of Sussex, Brighton, UK, March 2012.
URI: https://dspace.lboro.ac.uk/2134/9685
Publisher Link: http://www.sussex.ac.uk/comvebonov/
ISBN: 9780957185814
Appears in Collections:Conference Papers and Contributions (Aeronautical and Automotive Engineering)

Files associated with this item:

File Description SizeFormat
Kumar Sussex Mar2012.pdf1.07 MBAdobe PDFView/Open

 

SFX Query

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.