Use of the vibroacoustic transfer function built for the prediction of noise radiated to other vibrational states

The aim is to use the vibroacoustic transfer function G constructed numerically for a vibrational state to predict the acoustic radiation of the gear transmission for other vibrational excitation states. This approach method based on C. MARQUIS's model allows from some measures available normal vibrational velocities measured on the transmission to reproduce the acoustic field radiated in its environment for a different vibrational state, local or global interpolation types are made on the values of G. This field expressed in acoustic pressure and power levels can be predicted at the same points or on other points of the acoustic meshing. The findings and observations allow us to say that the Green function G constructed digitally for a certain vibrational state has comfortably predicted the acoustic radiation for others vibrational states; it has kept its role of vibroacoustic transfer function. It will be used for monitoring, diagnosis and maintenance of gear drives