EFFECT OF INERTIAL ACTUATOR POSITIONING ON VIBRATING PLATES WITH OPENINGS IN VIBRO-ACOUSTIC SYSTEMS

In vibro-acoustic systems, the interaction between structural vibrations and sound radiation is a critical aspect in the design of efficient noise control systems. The presence of openings in vibrating plates further complicates this interaction. This study explores the effect of inertial actuator positioning on the vibro-acoustic behaviour of such plates through experimental analysis. The results suggest that, for fully clamped plates, positioning actuators away from the edges helps mitigate potential issues related to high stress concentrations in these regions. Additionally, positioning actuators too close to each other could lead to interactions that introduce nonlinearities in the plate's vibrational response. Strategic placement, with appropriate spacing and consideration of stress-prone areas, appears to improve sound control. Among the tested configurations, a layout with evenly spaced actuators, positioned away from both edges and each other, demonstrated superior control performance, extending performance both in terms of the frequency range and overall noise reduction. These findings highlight the importance of optimizing actuator placement in vibro-acoustic systems, offering practical implications for noise control across various engineering applications, including aerospace, automotive, and structural engineering.