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Title: In-plane and out-of-plane elastodynamics of thin rings and seals
Authors: Turnbull, Robert
Rahmani, Ramin
Rahnejat, Homer
Keywords: Thin circular ring
Seal
Elastodynamics
In-plane responses
Out-of-plane responses
Piston compression ring
Issue Date: 2019
Publisher: © ASME International
Citation: TURNBULL, R., RAHMANI, R. and RAHNEJAT, H., 2019. In-plane and out-of-plane elastodynamics of thin rings and seals. Journal of Computational and Nonlinear Dynamics, 14(8): 081006.
Abstract: Thin curved rings used mostly as seals, including in internal combustion engines undergo complex elastodynamic behavior when subjected to a combination of normal radial loading and tangential shear with friction. In turn, their complex modal behavior often results in loss of sealing, increased friction, and power loss. This paper presents a new finite difference approach to determine the response of thin incomplete circular rings. Two interchangeable approaches are presented; one embedding mass and stiffness components in a unified frequency-dependent matrix, and the other making use of equivalent mass and stiffness matrices for the ring structure. The versatility of the developed finite difference formulation can also allow for efficient modification to account for multiple dynamically changing ring support locations around its structure. Very good agreement is observed between the numerical predictions and experimental measurements, particularly with new precision noncontact measurements using laser Doppler vibrometry. The influence of geometric parameters on the frequency response of a high performance motorsport engine’s piston compression ring demonstrates the degree of importance of various geometrical parameters on ring dynamic response.
Description: This is an Open Access Article. It is published by Asme under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Sponsor: Engineering and Physical Sciences Research Council (EPSRC) (EP/L014998/1; Funder ID: 10.13039/ 501100000266).
Version: Published
DOI: 10.1115/1.4043526
URI: https://dspace.lboro.ac.uk/2134/37853
Publisher Link: https://doi.org/10.1115/1.4043526
ISSN: 1555-1415
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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