Experimental investigation into sound and vibration of a torpedo-shaped structure under axial force excitation

James Leader, Jie Pan, Paul Dylejko, David Matthews

Research output: Chapter in Book/Conference paperConference paper

8 Citations (Scopus)

Abstract

In this study the sound radiation patterns and vibration characteristics of a torpedo-shaped structure are determined experimentally using a proof mass actuator to provide a nominally axial excitation of the model. Using this method the second energy path found in previous designed structures is eliminated. Input power and driving forces are measured using force transducers localized at the excitation device whilst the sound pressure and its directivity are captured by a spatially distributed microphone array inside an anechoic chamber. The vibration response and mode shapes are measured using an array of accelerometers contrasted by an hammer impace test and finite element modeling to investigate the free vibration response of the structure. Motivations for this work are to investigate the effect of the complex boundary constraints: a semi-spherical head and conical tail on the two meter long model when compared to existing analytical solutions for simple geometries, to investigate unforeseen effects of the practical structure, and later the measurement will be performed in an underwater experiment to contrast the effect of fluid loading.

Original languageEnglish
Title of host publicationProceedings of Meetings on Acoustics
EditorsLuc Mongeau
Place of PublicationAmerica
PublisherAIP Publishing
Number of pages9
Volume19
ISBN (Print)1939-800X
DOIs
Publication statusPublished - 2013
Event2013 International Congress on Acoustics - Montreal, Montreal, Canada
Duration: 2 Jun 20137 Jun 2013

Conference

Conference2013 International Congress on Acoustics
CountryCanada
CityMontreal
Period2/06/137/06/13

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