A direct transmissibility formulation for experimental statistical energy analysis with no input power measurements

An experimental statistical energy analysis method is proposed that requires neither input power measurements nor strong restrictive hypothesis on the nature of coupling between subsystems. Coupling loss factors are obtained from direct or blocked energy transmissibilities provided that total or internal loss factors are known, for instance, from application of the energy decay rate method. In turn, direct transmissibilities are computed from standard measurable energy transmissibilities, following the ideas of the direct transfer approach to transmission path analysis. The theoretical background of the proposed formulation is presented together with a numerical example to indicate how it could be applied in a practical case.

► An experimental statistical energy analysis formulation is presented that does not require input power measurements.
► Coupling loss factors are obtained from direct or blocked mean square velocity transmissibilities.
► In turn, direct transmissibilities can be computed from measurable standard transmissibilities.
► Numerical issues regarding implementation are considered and a numerical example is included.