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Vibroacoustic Analyses
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Flight Dynamics.
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The study of vibrations of structures is paramount in the aerospace industry, as parts are subjected to important dynamic loads. A vibroacoustic analysis of structures is thus undergone in order to ensure that they can withstand the acoustic environment. A validated in-house software was proven to be very reliable but commercial solutions could provide further options in terms of modelisation and decrease computation time while being as accurate as the in-house software. In this paper, a benchmark between ArianeGroup in-house vibroacoustic software and MSC Actran is carried out in order to evaluate their performance in terms of computation time. This comparative study shows that ArianeGroup in-house software and Actran converge towards the same PSD acceleration results and both softwares are consistent with SEA calculations at high frequencies. For a small model, the in-house software is as efficient as Actran but its performance decreases as the size of the model increases. A sensitivity study on Actran decomposition parameters shows that accuracy increases with the number of samples and plane waves used at a cost of an increased computation time. Yet, acceptable accuracy can be achieved without compromising on computation time.

Place, publisher, year, edition, pages
2017. , p. 18
Series
TRITA-AVE, ISSN 1651-7660 ; 2017:61
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-223325OAI: oai:DiVA.org:kth-223325DiVA, id: diva2:1183331
External cooperation
Airbus Safran
Examiners
Available from: 2018-02-20 Created: 2018-02-16 Last updated: 2018-02-20Bibliographically approved

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CiteExportLink to record
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  • apa
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