Influence of Double-Panel Structure Modification on Vibroacoustical Properties of a Rigid Device Casing

Nowadays, noise generated by devices is a serious issue in industry and everyday life, because it may cause health damage to humans. In this research, cubic rigid device casing built of double-panel thin steel walls employed reduce emitted from an enclosed source. Double-panel structure used good sound insulation provides. There exist three main groups reduction methods, i.e. passive, semi-active active. paper, modification applied examined. The bistable actuator (solenoid) mounted between incident radiating plates changes its state due constant voltage, causing the coupling plates. Experimentally measured natural frequencies modeshapes are compared simulation results. influence proposed on dynamical properties analyzed discussed.