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Conceptual design and sizing of airframe panels according to safe-life acoustic fatigue criteria

Conceptual design and sizing of airframe panels according to safe-life acoustic fatigue criteria
Conceptual design and sizing of airframe panels according to safe-life acoustic fatigue criteria
This paper presents a methodology that permits accounting for acoustic fatigue effects when sizing safe-life structural skin-stringer panels at the conceptual design stage of aircraft product development. The approach is based upon estimation of the maximum noise radiated from an entry-into-service year 2020 turbofan. Sonic fatigue endurance is assessed for different skin-stringer panels having different values of skin thickness, rib pitch and stringer pitch. Three different materials were considered in this study: aluminium 2024-T3 alloys (Al 2024-T3); carbon fibre-reinforced plastics (CFRP); and, glass reinforced fibre metal laminate (Hybrid Glare-3). The study resulted in CFRP having the most favourable sonic fatigue performance. In order to link economic considerations into technical decision making, the sonic endurance methods were coupled with an industry grade costing analysis tool (SEER-HTM) to examine the impact of safe-life design on the panel cost and weight. The presented methodology has been shown to be sufficiently generic in nature and robust. This will not only assist in identifying acoustic fatigue as a potential critical design scenario, but will also increase throughput during conceptual design sizing and optimisation.
0001-9240
1-13
Ajaj, R.M.
ff8ce68d-2ba5-449e-83da-f2be54e6d409
Allegri, G.
8dd43a78-5f53-472f-853a-1b2fd7b129e4
Isikeveren, A.T.
90e62b3a-3809-43cf-b3d2-837ac1d0bac0
Ajaj, R.M.
ff8ce68d-2ba5-449e-83da-f2be54e6d409
Allegri, G.
8dd43a78-5f53-472f-853a-1b2fd7b129e4
Isikeveren, A.T.
90e62b3a-3809-43cf-b3d2-837ac1d0bac0

Ajaj, R.M., Allegri, G. and Isikeveren, A.T. (2011) Conceptual design and sizing of airframe panels according to safe-life acoustic fatigue criteria. Aeronautical Journal, 114 (1162), 1-13.

Record type: Article

Abstract

This paper presents a methodology that permits accounting for acoustic fatigue effects when sizing safe-life structural skin-stringer panels at the conceptual design stage of aircraft product development. The approach is based upon estimation of the maximum noise radiated from an entry-into-service year 2020 turbofan. Sonic fatigue endurance is assessed for different skin-stringer panels having different values of skin thickness, rib pitch and stringer pitch. Three different materials were considered in this study: aluminium 2024-T3 alloys (Al 2024-T3); carbon fibre-reinforced plastics (CFRP); and, glass reinforced fibre metal laminate (Hybrid Glare-3). The study resulted in CFRP having the most favourable sonic fatigue performance. In order to link economic considerations into technical decision making, the sonic endurance methods were coupled with an industry grade costing analysis tool (SEER-HTM) to examine the impact of safe-life design on the panel cost and weight. The presented methodology has been shown to be sufficiently generic in nature and robust. This will not only assist in identifying acoustic fatigue as a potential critical design scenario, but will also increase throughput during conceptual design sizing and optimisation.

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Submitted date: 25 January 2010
Published date: January 2011
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 358324
URI: https://eprints.soton.ac.uk/id/eprint/358324
ISSN: 0001-9240
PURE UUID: 5fcadd12-137b-47fb-8918-e205c41e84f1

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Date deposited: 09 Oct 2013 15:32
Last modified: 16 Sep 2019 18:34

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