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On acoustic very near field measurements
Prezelj, Jurij (Avtor), Lipar, Primož (Avtor), Belšak, Aleš (Avtor), Čudina, Mirko (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://www.sciencedirect.com/science/article/pii/S0888327013002069 Povezava se odpre v novem oknu

Izvleček
Information about vibration modes is needed during the planning of noise control measures on different parts of machinery. A visualization of vibration modes is a starting point and different methods can be used to visualize vibration modes. Some methods which incorporate an inverse calculation of surface velocity from the sound pressure on some boundary have already been proposed, among others. A direct inverse method based on the discretized Rayleigh integral was used in our work, to demonstrate that microphones should be placed close to the vibrating structure to provide an acoustic transfer matrix with a low condition number. It is demonstrated, that there is practically no need for the calculation of the inverse matrix if microphones are placed in a very near field of the vibrating structure. A single microphone placed in a very near field together with a reference vibration sensor provides sufficient information for producing the images of vibration modes. Analytical results, numerical results, FEM simulations and measurement results were used to prove that properties of the sound pressure in a very near field permit a cost effective visualization of the vibration modes.

Jezik:Angleški jezik
Ključne besede:akustika, akustična holografija, inverzne metode, acoustics, very near field, inverse methods, sound source visualization, acoustic holography
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2013
Št. strani:str. 194-207
Številčenje:Vol. 40, no. 1
UDK:534(045)
ISSN pri članku:0888-3270
COBISS.SI-ID:13042203 Povezava se odpre v novem oknu
Število ogledov:1036
Število prenosov:305
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Naslov:Mechanical systems and signal processing
Skrajšan naslov:Mech. syst. signal process.
Založnik:Academic Press
ISSN:0888-3270
COBISS.SI-ID:169243 Povezava se odpre v novem oknu

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