On the utilization of a flexible beam as a spatial filter

A Wavenumber Approach to Modelling the Response of a Randomly Excited Panel, Part I: General Theory

“…Interest in the wavevector}frequency analysis has grown with studies concerned with the design of "lters used to measure the wavevector}frequency content of a spatially distributed stationary random process, such as the wall-pressure #uctuations beneath a turbulent boundary layer, either with an array of transducers [2,3] or a planar elastic structure [4,5]. Wavenumber}frequency measurements have provided useful information about the energy content of the wall-pressure "eld in the low wavenumber domain and thus, complement the space}time correlation measurements already obtained by Corcos [6], which are completely valid only at or near the convective wavenumber.…”