Vibration and Damping Characteristics of Composite Structures with Piezo Ceramics

압전 세라믹이 부착된 복합재 구조물의 진동 및 감쇠 특성

A numerical computation and experimental test have been performed for the investigation of dynamic behavior of composite beams with bonded piezo ceramics. The present finite element method based on layerwise approach can effectively evaluate the characteristics of the composite beams with bonded piezo ceramics. The natural frequencies and damping values were measured by fitting the frequency response function obtained from FFT analyzer. The frequency-dependent damping properties of composite material were measured to utilize them for the finite element analysis of the composite beams with bonded piezo ceramics. The experimental results are in good agreement with those of finite element analysis.