Dual-lane Phononic Crystal for Low-frequency Elastic Wave Attenuation

摘要

We report a phononic crystal system for achieving ultra-broadband elastic wave attenuation by taking advantages of self-cancellation. This concept is applied to a finitely long dual-lane phononic crystal beam. The two lanes are designed to split the incident elastic wave into two parts and introduce a phase difference between the waves that yields significant wave attenuation. The simulation result in this paper show that the wave attenuation capacity of proposed dual-lane phononic crystal system is remarkably improved.