Abstract
Aluminum-alloy-cantilever hammering tests were carried out using fiber Bragg grating (FBG) sensors, piezo-electric accelerometers and strain-gages to evaluate measumental easiness of the fixed end vibrations. Although accelerometers are uesd in vibration tests genenally, it is diffult to mesure the fixed end vibrations of cantileverers because of short arm lengths. However, it is expected that adopting FBG sesnors makes measuring dyanamic strains at the fixed end easy.The tests results show that FBG sensors can measure wider freqeucy-range vibrations than those in the cases using accelerometers. Moreover, it was easy to comapare the frequency analysis results of FBG sesnosr signals and the FEM analysis results. These results show that it is effective to measure vibrations at the fixed ends of cantilevers using FBG sensors.
