Proceedings of the 22nd International Congress on Acoustics, ICA 2016 pages:1-8
Proceedings of the 22nd International Congress on Acoustics, ICA 2016 location:Buenos Aires date:5-9 September 2016
The identification of vibrational sources can be done effectively by means of structural intensity
estimates, as the structural intensity indicates the energy power flow of the flexural waves propagating
through the structure. Considering the irrotational part of the structural intensity estimate
removes parts of the structural intensity field which are related to the near-field, thus showing the
part of the vibrational field that propagates to the far field. The use of the irrotational part of the
structural intensity results in a more clear view of the physical sources that are generating active
power to the structure.
A recently developed approach to calculate the irrotational part of the structural intensity from
measurement data was used and results are compared with another method from literature. It is
shown that the recently developed approach converges well and gives good results by virtue of
the smoothening effect of the test functional series expansion employed.