IDENTIFICATION OF THE ACOUSTIC WALL PRESSURE OF A TURBULENT FLOW EXCITING STRUCTURES

The aim of this study is to lay out an inverse method which allows to identify low wavenumbers of an excitation by a turbulent flow, in naval and aeronautic domains. The RIFF method (Filtered Windowed Inverse Resolution) is considered, it allows to identify the force distribution from local vibration field. The turbulent wallpressure is synthesized with wallpressure spectra and cross-spectra models. Methods used to synthesize the pressure field and to calculate the vibrations are detailed. We will show how to introduce the impact of fluid-structure coupling and the possibility to identify low wavenumbers of the excitation.