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The application of the dynamic stiffness method for the acoustic fatigue analysis of aircraft engine nacelle structures

The application of the dynamic stiffness method for the acoustic fatigue analysis of aircraft engine nacelle structures
The application of the dynamic stiffness method for the acoustic fatigue analysis of aircraft engine nacelle structures
The subject of acoustic fatigue first came to prominence with the advent of using jet engines on commercial aircraft in the 1950’s. Despite the period of time which has elapsed since then and the work carried out to help develop our understanding of the response of structures subject to high intensity noise, acoustic fatigue problems still occur. The novel contributions which this thesis makes to knowledge in the area have been in the application of the dynamic stiffness method which has been used to predict stress and strain response due to acoustic loading. The dynamic stiffness method can under certain circumstances provide very accurate results for natural frequency and displacement. Indeed for certain configurations it can provide exact solutions. It is largely independent of the number of degrees of freedom necessary to give an accurate result unlike the finite element method. The thesis documents how the dynamic stiffness method can offer a very favourable alternative to available analysis techniques. An alternative method of formulating the dynamic stiffness method is presented and is further extended to the
analysis of orthotropic plates. The response of actual structures is discussed and previously unpublished data is also presented.
Millar, David
715035d9-951b-4455-94cb-588ef3572b01
Millar, David
715035d9-951b-4455-94cb-588ef3572b01
Ferguson, Neil
8cb67e30-48e2-491c-9390-d444fa786ac8

(2012) The application of the dynamic stiffness method for the acoustic fatigue analysis of aircraft engine nacelle structures. University of Southampton, Faculty of Engineering and the Environment, Doctoral Thesis, 313pp.

Record type: Thesis (Doctoral)

Abstract

The subject of acoustic fatigue first came to prominence with the advent of using jet engines on commercial aircraft in the 1950’s. Despite the period of time which has elapsed since then and the work carried out to help develop our understanding of the response of structures subject to high intensity noise, acoustic fatigue problems still occur. The novel contributions which this thesis makes to knowledge in the area have been in the application of the dynamic stiffness method which has been used to predict stress and strain response due to acoustic loading. The dynamic stiffness method can under certain circumstances provide very accurate results for natural frequency and displacement. Indeed for certain configurations it can provide exact solutions. It is largely independent of the number of degrees of freedom necessary to give an accurate result unlike the finite element method. The thesis documents how the dynamic stiffness method can offer a very favourable alternative to available analysis techniques. An alternative method of formulating the dynamic stiffness method is presented and is further extended to the
analysis of orthotropic plates. The response of actual structures is discussed and previously unpublished data is also presented.

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More information

Published date: 1 April 2012
Organisations: University of Southampton, Inst. Sound & Vibration Research

Identifiers

Local EPrints ID: 351347
URI: http://eprints.soton.ac.uk/id/eprint/351347
PURE UUID: 3c99467b-c910-456f-a07c-5a0c03c843fa
ORCID for Neil Ferguson: ORCID iD orcid.org/0000-0001-5955-7477

Catalogue record

Date deposited: 02 Jul 2013 09:24
Last modified: 06 Jun 2018 13:18

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Contributors

Author: David Millar
Thesis advisor: Neil Ferguson ORCID iD

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