Frequency averaged injected power under boundary layer excitation : an experimental validation
Résumé
Energy methods usually deal with frequency averaged quantities. Statistical Energy Analysis, for example, uses energy per subsystems and power injected averaged over frequency bands. Usually, when a structure is excited by a turbulent boundary layer, its response is calculated using a model of boundary pressure cross spectrum (Corcos, E¯mtsov...). Such calculations take into account bound- ary conditions and exact geometry of the excited structure which is often non necessary for energy method. A model of Frequency Averaged Injected Power has been previously proposed as a tool for vibroacoustic pre-design process. The present paper deals with an experimental validation of the FAIP model. It shows a really good agreement between model and experiments even if the simplest form of the model is used.