Design of double-layered framed plate with equivalent impedance

To get clear the vibration mechanism of sandwith shell using experiment method, a double-layered plate is designed for sandwich by matching equivalent impedance. Numerical analysis conducted, and In 10Hz-4000Hz, differenceof impedance from should be less than 10%. A new design given plate, which quite simple construction. Then, could applied to conduct series tests influence core material on structural vibration, while it also reduce costs money construction time.