란쥬반형 진동자의 유한요소해석 및 세라믹 적층특성 비교

FEA of Langevin Type Ultrasonic Vibrator and Comparison of Stacking Characteristic of Ceramics

In this paper, we calculated equivalent circuit of Langevin type ultrasonic vibrator and designed a vibrator whose resonant frequency is 50(KHz). FEA (Finite Element Analysis) was employed to calculate the resonant frequencies and maximum displacements of designed vibrators. The computer calculated resonant frequencies were approached to the designed one. As AC voltage input the maximum displacements were shown sinusoidal changes. Terminal input admittance over a frequency range spanning the resonant frequency were calculated. ANSYS was employed to calculate resonant frequencies, displacements and terminal input admittance of vibrators