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Title: A survey on the variability of dynamic stiffness data of identical vehicles
Authors: Abolfathi, Ali
O'Boy, D.J.
Walsh, Stephen J.
Dowsett, Amy
Fisher, Stephen A.
Keywords: Vibrating surfaces and structures
Elasticity of structures
Statistical methods
Issue Date: 2016
Publisher: German Acoustical Society (DEGA)
Citation: ABOLFATHI, A. ...et al., 2016. A survey on the variability of dynamic stiffness data of identical vehicles. IN: Kropp, W., von Estorff, O. and Schulte-Fortkamp, B. (eds.) Proceedings of the 45th International Congress on Noise Control Engineering: Towards a Quieter Future (Internoise 2016), Hamburg, Germany, Aug 21-24th.
Abstract: The variation in material quality, production tolerances and joint conditions in nominally ‘identical’ vehicles means that the level of noise and vibration perceived in the cabin will vary from car to car. To assess the level of variability in the low and medium frequency range a series of measurement have been conducted on a small set of nominally identical sedan vehicles. Measurements are presented in the form of dynamic stiffness data for twenty three vehicle mounting and response points and for three different translational directions. In this paper, the methodology used to analyse the large data set is shown. The level of variability in the corresponding frequency response functions (FRFs) from all the vehicles are then presented and compared for different locations and the different loading measurement directions. The mean value is calculated for each data set and compared and the variability is also presented as a function of frequency for a selected set of the dynamic stiffness data. The intention is to demonstrate how the level of FRF variability changes depending upon the excitation/response location chosen and how this can be related to the frequency band characteristics.
Description: This conference paper is published with kind permission of DEGA.
Sponsor: This work was supported by Jaguar Land Rover and the UK-EPSRC grant EP/K014102/1 as part of the jointly funded Programme for Simulation Innovation.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/22559
Publisher Link: http://pub.dega-akustik.de/IN2016/data/index.html
ISBN: 9783939296119
ISSN: 0105-175x
Appears in Collections:Conference Papers and Presentations (Aeronautical and Automotive Engineering)

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