FIRST MODELS FOR STRUCTURAL ENERGY TRANSMISSION DECOUPLING

For the analysis of the vibrational response of structures subjected to aerodynamic excitations, wind tunnel facilities are equipped with ”test bench” structures. Clearly, for the sake of the measurements’ purity, it is important that the test bench does not transmit part of its vibrational energy to the test structure. For this reason, it is important to define design rules with which it is possible to project ”smartly” a test bench which ensures an energy transmission decoupling. This work has been carried out focusing in the high frequency domain (HF), exploiting the possibility to assume an aerodynamic excitation as the Turbulent Boundary Layer (TBL) approximated to an Equivalent Rain-on-the-roof excitation. The method invoked here was based on Statistical Energy Analysis (SEA). For the analysis of vibrational response, a simplified model was conceived: it is wanted to determine the effective design rules for the structure and material properties; this means that it is wanted to guarantee the possibility of different material choices for a test bench project and, at the same time, to ensure a test bench versatility.