Impact of Input Signal Characteristics on Energy-Localization Performance of a Phononic Crystal with a Defect: A Comparative Study of Burst and Continuous Wave Excitation

This study examines the energy-localization performance of a one-dimensional phononic crystal (PnC) with defect when exposed to burst waves different cycle numbers under longitudinal waves. Using finite element method, band structures defect-introduced PnC were calculated, revealing band-gap range, defect-band frequencies, and corresponding defect-mode shapes. The transient analysis examined displacement at center this in time domain for various burst-wave scenarios. results indicate that inside highly depended on number cycles. Energy-localization was better larger cycles or continuous waves, although small also showed some improvement, albeit limited. Moreover, did not clearly induce fixed-like boundary conditions (in other words, nodal points standing waves) within PnC, leading obscure energy-localized behaviors. Key messages from work can be summarized as follows. First, comparing incident systems might appropriate. Second, physically reasonable formation defect-mode-enabled energy localization requires large case study, over 500)