A hybrid method for vibroacoustic coupling
Application to the noise radiated around an engine compartment
DOI:
https://doi.org/10.13052/REMN.17.689-699Keywords:
vibroacoustics, mechanism, high frequency, equivalent sourcesAbstract
hybrid method is proposed to study the noise radiated in the high frequency range by a gearbox inside an engine compartment. Due to its elastodynamic characteristics, the vibratory behaviour of the transmission lies in the low frequency range. However, the noise radiated is rather in the high frequency range facing the size of the acoustical cavity. Thus the proposed hybrid method allows to couple a low-frequency vibratory approach to the radiative transfer method used for the high frequency acoustical calculation. The coupling is realized through equivalent energy sources introduced on the surface of the vibrating structure.
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