- 會議論文
Acoustic Wave Propagation Analysis of Periodic Structures with Defects
並列摘要
Periodic structures can act as filters for acoustic wave propagation within certain bands of frequency called stop bands. In this investigation, defects are used in the periodic structures to study the characteristics of the wave propagation on the periodic system. In addition, the shape memory alloy (SMA) is also used to control the characteristics of the periodic system. The location and width of the stop bands can be changed with different configurations of the additional defects. The finite element model and the transfer matrix method are developed to study the one-dimensional, periodically structural problems with defects to predict the performance of the system. The behaviors of the periodic structure are evaluated at different length ratios and material properties of the defects. The investigation in the present study provides the basic guidelines to design periodic structures with various defects to achieve certain filtering characteristics.
延伸閱讀
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