Failure Mechanism of Vibration-based Energy Harvester

초록

This study analyzes the failure mechanism and improves the design of the vibration-based energy harvester (VEH) , which intends to replace or extend service life of batteries for condition monitoring system for high-risk structures such as railway vehicle and wind turbine, The observation of fractured VEH under service condition reveals everal cracks originating the surface of VEH. Then,conducting the vibration test using the electromagnetic exciter brings out the resonant frequency of VEH, displacement-frequency and acceleration-frequ장lCy plots. Comparing the failure surface under vibration test with that under service condition shows themail failure mechanism is the static brittle fracture. And the failure critical location and stress state are identified through the modal and frequency response analysis.