PhD student Soo-ho Jo from the Laboratory for System Health & Risk Management (Advisor: Prof. Byeng Dong Youn) received Best Paper Award at the Korean Society for Noise and Vibration Engineering (KSNVE) 2018 Fall Conference, held from October 17 to 19, 2018, at the Ocean Resort in Yeosu.

The research, titled “Multiple Resonant Modes of a Phononic Crystal with Defects for Piezoelectric Energy Harvesting,” presented a mathematical analysis of the phenomenon in which when phononic crystals with phononic band gap are affected with multiple defects, the single defect band is split. In order to gain a deeper understanding of multiple resonant modes, the research examined the splitting of defect bands in accordance with the distance between and direction of defects, and analyzed the effect of this phenomenon on piezoelectric energy harvesting. Resolving the problem of narrowband characteristics of the currently used single defect-based energy localization, it suggested a new method of piezoelectric energy harvesting using multiple resonant modes of phononic crystals.