周期チューブ・ブロック構造の弾性波透過と共振に関する数値解析

抄録

This paper proposes a periodic tube-block structure and investigates its application for controlling elastic wave propagation. The elastic wave transmission and resonance in the structure were analyzed by the finite element method. As a result, it was shown that the transmission ratio has many peaks at different frequencies depending on the dimensions of the structure, such as the tube radius. These peaks are associated with local resonance in the structure. Some of them result from tube resonance, and their peak frequencies shift when the outer radius and thickness of the tube are changed. Other peaks appear due to local resonance in the vicinity of the block surfaces, and their peak frequencies vary with the width between tubes. The effect of the joint width between tube and block on the peak behavior is relatively insignificant.