A framework for the analysis of vibrations of structures with uncertain attachments
A framework for the analysis of vibrations of structures with uncertain attachments
Attachments affect the dynamic response of an assembled structure. When engineers are modelling structures, small attachments will often not be included in the “bare” model, especially in the initial design stages. The location of these attachments might be poorly known, yet they affect the response of the structure. This paper considers how attachments jointed to the structure at uncertain points, can be included in the dynamic model of a structure. Two approaches are proposed. In the time domain, a combination of component mode synthesis, characteristic constraint modes and modal analysis gives a computationally efficient basis for subsequent analysis using, for example, Monte Carlo simulation. The frequency domain approach is based on assembly of frequency response functions of bare structure and attachment. Numerical examples of a beam and a plate with a point mass added at an uncertain location are considered and predictions compared with experiment results.
1-10
Liu, Shuo
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Mace, Brian
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Ferguson, Neil
8cb67e30-48e2-491c-9390-d444fa786ac8
Halkyard, Roger
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Liu, Shuo
f25cf765-bba3-4d25-863c-c97e2b1fb185
Mace, Brian
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe
Ferguson, Neil
8cb67e30-48e2-491c-9390-d444fa786ac8
Halkyard, Roger
a98596e7-6935-40a3-8bdf-2b1a1b016d5e
Liu, Shuo, Mace, Brian, Ferguson, Neil and Halkyard, Roger
(2016)
A framework for the analysis of vibrations of structures with uncertain attachments.
Journal of Physics: Conference Series, .
(In Press)
Abstract
Attachments affect the dynamic response of an assembled structure. When engineers are modelling structures, small attachments will often not be included in the “bare” model, especially in the initial design stages. The location of these attachments might be poorly known, yet they affect the response of the structure. This paper considers how attachments jointed to the structure at uncertain points, can be included in the dynamic model of a structure. Two approaches are proposed. In the time domain, a combination of component mode synthesis, characteristic constraint modes and modal analysis gives a computationally efficient basis for subsequent analysis using, for example, Monte Carlo simulation. The frequency domain approach is based on assembly of frequency response functions of bare structure and attachment. Numerical examples of a beam and a plate with a point mass added at an uncertain location are considered and predictions compared with experiment results.
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Accepted/In Press date: 12 August 2016
Organisations:
Dynamics Group
Identifiers
Local EPrints ID: 399563
URI: http://eprints.soton.ac.uk/id/eprint/399563
ISSN: 1742-6588
PURE UUID: d13489f1-cc2f-43c8-8d68-c8bb15d64189
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Date deposited: 19 Aug 2016 12:19
Last modified: 15 Mar 2024 05:49
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Author:
Shuo Liu
Author:
Roger Halkyard
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