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Quantifying the variability in stiffness and damping of an automotive vehicle's trim-structure mounts

Abolfathi, A; O’Boy, DJ; Walsh, SJ; Dowsett, AM; Fisher, SA; (2016) Quantifying the variability in stiffness and damping of an automotive vehicle's trim-structure mounts. Journal of Physics: Conference Series , 744 (1) , Article 012197. 10.1088/1742-6596/744/1/012197. Green open access

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Abstract

Small plastic clips are used in large numbers in automotive vehicles to connect interior trims to vehicle structures. The variability in their properties can contribute to the overall variability in noise and vibration response of the vehicle. The variability arises due to their material and manufacturing tolerances and more importantly due to the boundary condition. To measure their stiffness and damping, a simple experimental rig is used where a mass is supported by the clip which is modelled as a single degree of freedom system. The rig is designed in a way that it simulates the boundary condition as those of the real vehicle. The variability in clip and also due to the boundary condition at the structure side is first examined which is 7% for stiffness and 8% for damping. To simulate the connection of the trim side, a mount is built using a 3D printer. Rattling occurs in the response of the clips with loose connections, however by preloading the mount the effective stiffness increases and the rattling is eliminated. The variability due to the boundary condition at the trim side was as large as 40% for stiffness and 52% for damping.

Type: Article
Title: Quantifying the variability in stiffness and damping of an automotive vehicle's trim-structure mounts
Location: Southampton, UK
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/1742-6596/744/1/012197
Publisher version: http://dx.doi.org/10.1088/1742-6596/744/1/012197
Language: English
Additional information: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence (http://creativecommons.org/licenses/by/3.0). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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/1503512
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