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A survey on the variability of dynamic stiffness data of identical vehicles

Abolfathi, A; O'Boy, DJ; Walsh, SJ; Dowsett, A; Fisher, SA; (2016) A survey on the variability of dynamic stiffness data of identical vehicles. In: Von Estorff, O and Schulte-Fortkamp, B and Kropp, W, (eds.) Proceedings of the INTER-NOISE 2016 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future. (pp. pp. 5296-5301). INTER-NOISE: Hamburg, Germany. Green open access

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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.

Type: Proceedings paper
Title: A survey on the variability of dynamic stiffness data of identical vehicles
Event: INTER-NOISE 2016 45th International Congress and Exposition on Noise Control Engineering: Towards a Quieter Future
Location: Hamburg, Germany
Dates: 21 August 2016 - 24 August 2016
ISBN-13: 9783939296119
Open access status: An open access version is available from UCL Discovery
Publisher version: http://pub.dega-akustik.de/IN2016/data/index.html
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Vibrating surfaces and structures, elasticity of structures, statistical methods
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1514542
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