A pseudo-forces methodology to be used in characterization of structure-borne sound sources

Vibration source description in substructuring: A theoretical depiction

“…which according to (23) is identical to (21), itself equivalent to the original problem (20) as long as the dynamic solutions u c and u B i are concerned. Obviously for the internal dofs of u A i the solution of the substitutive problem (23) yields a different response, but those are usually not of interest in a noise and vibration propagation analysis.…”

“…In [21] a pseudo-force method was proposed to replace the unknown source excitation by external forces applied anywhere on the source. The blocked force can be considered as a special case of that method when the pseudo-forces are applied exactly on the interface.…”

Structural source identification using a generalized Tikhonov regularization

“…The resolution of this inverse problem has been extensively studied over the past three decades. The most widespread approaches are based on the transfer functions matrix of the structure under test [1,2,3,4,5], that can be numerically computed [2,6] or measured [7,8,9]. There exists, however, alternative approaches based on the numerical calculation of a local operator corresponding to the dynamic stiffness of a part of the structure [10,11,12,13,14].…”

Reception plate method for characterisation of structure-borne sound sources in buildings: Assumptions and application

“…The equivalent force is obtained by replacing the real source with a point force which can be adjusted to realise the same sound pressure level in the receiver room. Reciprocal methods also are available to evaluate the required forces [11]. A basic requirement is that the source behaves as a high-mobility source compared with the receiver structure and the power depends on the mobility of the receiver structure.…”