Numerical analysis of small defect detection of beam by using lacal excitation method

By using piezoelectric actuator bridge can be accelerated locally to detect the effect of small damage like fatigue crack as a response change of vibration. Transfer function (TF) of the vibration response can give us the indication of existence of damage before and after the damage. Detail analysis of TF before and after damage can inform us location and size (area) of damage. This paper shows the result of numerical analysis of damage detection on beam member by using local force excitation method.