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http://dx.doi.org/10.12985/ksaa.2012.20.3.044

The Study for Vibro-acoustic Noise Analysis in the Fuselage of Regional Turboprop Airplane  

Park, Illkyung (한국항공우주연구원)
Kim, Sungjoon (한국항공우주연구원)
Jung, Jinduck (한국항공우주연구원)
Publication Information
Journal of the Korean Society for Aviation and Aeronautics / v.20, no.3, 2012 , pp. 44-50 More about this Journal
Abstract
The noise reduction is important one of considerations in the process of a civil aircraft development program. External noise sources are classified into an air-born source and a structure-born source. Among these noise sources, the most affected noise source into a cabin is the air-born noise source from an engine or propeller. The external noise is transmitted into the cabin through the fuselage structure of airplane which are composed of an fuselage structure, an interior trim panel and an acoustic insulation layer between an fuselage structure and an interior trim panel. Therefore, appropriate fuselage structure and acoustic insulation layer is very important to reduce the internal noise level. In this paper, the vibro-acoustic coupled analysis of the cabin noise of the 80~90 seats regional turboprop aircraft is carried out to validate the acoustic analysis method using Direct BEM and FEM. The sound pressure level onto the fuselage skin is acquired by fan-source noise analysis using BEM, and which sound pressure is used as acoustic noise source in vibro-acoustic noise analysis for cabin noise analysis using FEM.
Keywords
Vibro-acoustics; Regional Turboprop; Cabin; Fuselage; Propeller Noise;
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