Accurate FEM investigation of acoustic properties in aerospace sandwich structures with metamaterial core

It is well known that, to compete in the global market, the design of modern aircraft is driven by the continuous improvement of the safety and cabin comfort. The surrounding environment and particularly noise and vibration (N&V) can deeply affect passengers and pilots in cabin and cockpit, especially during long haul flights. On the other hand, spacecraft and its payload are subjected to high structural vibrations, during launch phase, that are crucial in view of the overall success of a spacecraft’s mission. In this sense, reducing the acoustic loads plays a significant role in cost optimization of the mission. A possible solution to the problem of noise is the conception of high-performance acoustic treatments for the trim panels of aerospace vehicle.