A framework for the propagation of uncertainty in Transfer Path Analysis

Meggitt, JWR ORCID: https://orcid.org/0000-0002-6665-2939, Moorhouse, AT ORCID: https://orcid.org/0000-0002-4034-1091, Weinen, K and Sturm, M 2020, 'A framework for the propagation of uncertainty in Transfer Path Analysis' , Journal of Sound and Vibration . (In Press)

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Abstract

Transfer Path Analysis (TPA) is a test-based methodology used to analyse the propagation of noise and vibration in complex systems. In this paper we present a covariance based framework for the propagation of experimental uncertainty in classical, blocked force, and component-based TPA procedures. The presence of both complex and correlated uncertainty is acknowledged through a bivariate description of the underlying uncertainty. The framework is summarised by a series of equations that propagate uncertainty through the various stages of a TPA procedure i.e. inverse source characterisation, dynamic sub-structuring, and forward response prediction. The uncertainty associated with rank ordering of source contributions is also addressed. To demonstrate the proposed framework a numerical simulation is presented, the results of which are compared against Monte-Carlo methods with good agreement obtained. An experimental study is also presented, where a blocked force TPA is performed on an electric steering system. The proposed uncertainty framework requires no additional experimental effort over and above what is performed in a standard TPA and may therefore be readily implemented into current TPA practices.

Item Type: Article
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Journal of Sound and Vibration
Publisher: Elsevier
ISSN: 0022-460X
Funders: Engineering and Physical Sciences Research Council (EPSRC)
Depositing User: JWR Meggitt
Date Deposited: 30 Apr 2020 10:13
Last Modified: 30 Apr 2020 10:15
URI: http://usir.salford.ac.uk/id/eprint/56945

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