Structural sources identification through an inverse mid-high frequency energy method

Bayesian identification of structural parameters of hybrid mid-frequency systems

A Bayesian technique is presented to evaluate the coupling characteristics of complex vibro-acoustic or structural dynamic systems. Although there is no restriction on the applicability of the method in the whole frequency range, any such coupled system may be considered to be a hybrid system in the sense that its components may behave in their low-, midor high-frequency regimes. Inexact measur...

Energy predictions of turbulent boundary layer induced mid-high frequency structural vibrations

A coupled BEM and energy flow method for mid-high frequency internal acoustic

This paper deals with the behaviour of acoustic cavities in the mid-high frequency range. The method proposed here is based on an energy flow method named Simplified Energy Method (MES). MES method is quite efficient in the mid-high frequency range but the directivity of the boundary sources is not well estimated. We propose a hybrid method which couples MES and the Boundary Element Method (BEM...

Source Identification in Structural Acoustics with an Inverse Frequency Response Function Technique

Inverse source identification based on acoustic measurements is essential for the investigation and understanding of sound fields generated by structural vibrations of various devices and machinery. Acoustic pressure measurements performed on a grid in the nearfield of a surface can be used to determine the vibration pattern of the surface at the frequency of interest. A general applicable meth...

Mid-infrared Identification of Faint Submillimeter Sources

Faint submillimeter sources detected with the Submillimeter Common-User Bolometer Array on the James Clerk Maxwell Telescope have faced an identification problem due to the telescope’s broad beam profile. Here we propose a new method to identify such submillimeter sources with a mid-infrared image having a finer point spread function. The Infrared Space Observatory has provided a very deep 6.7μ...