Kumar Sussex Mar2012.pdf (1.04 MB)
Numerical modelling techniques to optimise automotive-type panels for reduced sound radiation
conference contribution
posted on 2012-04-17, 11:20 authored by Stephen Walsh, G. Kumar, Victor V. KrylovNumerical 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.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
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.Publisher
© University of SussexPublication date
2012Notes
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.ISBN
9780957185814Publisher version
Language
- en