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Experimental Testing of Door Panel Boundary Conditions to Determine NVH Variability

Dowsett, AM; O’Boy, DJ; Walsh, SJ; Abolfathi, A; Fisher, SA; (2016) Experimental Testing of Door Panel Boundary Conditions to Determine NVH Variability. In: Proceedings of the 23rd International Congress on Sound and Vibration (ICSV23). The International Institute of Acoustics and Vibration (IIAV): Athens, Greece. Green open access

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Abstract

The variability of measured frequency response functions (FRFs) from nominally identical structures is a well-known phenomenon and trying to eradicate it increases the design challenge for automotive manufacturers. In this paper a vehicle door is experimentally tested in order to assess the effect of variability in the attachment boundary conditions between the door structure and trim components upon measured FRF data. Plastic clips can be used to hold the trim to the door panel, so individual clips were systematically removed and then replaced in order to generate a set of measured FRFs that demonstrate how individual property changes can influence the global structure. Point and transfer FRFs, with corresponding normalised standard deviations, were measured by exciting the door panel and measuring the response both on the door panel and on the attached trim. The door response was found to vary by up to 10% over all clip combinations, and this is compared to the test variability. A newly developed function that predicts the FRF variability due to measurement test error was also applied. The results of this prediction match closely with the normalised standard deviation calculated from repeat FRF measurements taken on the structure. This will therefore enable test-to-test variability to be separated from structure-to-structure variability

Type: Proceedings paper
Title: Experimental Testing of Door Panel Boundary Conditions to Determine NVH Variability
Event: The 23rd International Congress on Sound and Vibration (ICSV23): From Ancient to Modern Acoustics
Location: Athens, Greece
Dates: 10 July 2016 - 14 September 2016
Open access status: An open access version is available from UCL Discovery
Publisher version: https://icsv25.org/archives_icsv_last/2016_icsv23/...
Language: English
Additional information: This version is the author version of record. For information on re-use, please refer to the publisher’s terms and conditions.
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/1514530
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