Preliminary experimental validation of FEM-MFS approach for prediction of re-radiated noise

• Autores: Aires Colaço, Pedro Alves Costa, Alexandre Castanheira Pinto, Paulo Amado-Mendes, Luís Godinho
• Localización: Tecniacústica 2017: 48º Congreso Español de Acústica ; Encuentro Ibérico de Acústica ; European Symposium on Underwater Acoustics Applications ; European Symposium on Sustainable Building Acoustics : A Coruña 3-6 Octubre 2017 / coord. por Antonio Calvo Manzano, Antonio Pérez López, 2017, ISBN 978-84-87985-29-4, págs. 1069-1077
• Idioma: inglés
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• Resumen

  • The interest of scientific and technical communities on the re-radiated noise phenomenon is increasing over the last years. This paper presents an experimental validation of a 3D FEM-MFS numerical model to predict vibrations and re-radiated noise inside an enclosure. The experimental work carried out consisted in the excitation of a reduced size acoustic chamber through the application of an impulse induced by an instrumented hammer. Simultaneously, the structural and acoustic dynamic responses of the system were monitored by a set of accelerometers and microphones. The case study was then modeled and the experimental data is compared with the numerical results, showing that the proposed numerical approach is efficient and accurate.