iop.pdf (1.85 MB)
Quantifying the variability in stiffness and damping of an automotive vehicle's trim-structure mounts
journal contributionposted on 2016-09-23, 10:15 authored by Ali Abolfathi, Daniel O'BoyDaniel O'Boy, Stephen Walsh, Amy Dowsett, Stephen A. Fisher
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.
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.
- Aeronautical, Automotive, Chemical and Materials Engineering
- Aeronautical and Automotive Engineering
Published in12th International Conference on Recent Advances in Structural Dynamics
CitationABOLFATHI, A. ...et al., 2016. Quantifying the variability in stiffness and damping of an automotive vehicle's trim-structure mounts. Journal of Physics: Conference Series, 744 (1), paper 012197
Publisher© The Authors. Published by IOP Publishing LTD
- VoR (Version of Record)
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution 3.0 (CC BY 3.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by/3.0/
NotesThis open access paper was presented at the 12th International Conference on Recent Advances in Structural Dynamics, University of Southampton, July 3-6th. It is distributed under the terms of the Creative Commons Attribution 3.0 licence.