التفاصيل البيبلوغرافية
| العنوان: |
Experimental study of coupled acoustic-mechanical bandgaps. |
| المؤلفون: |
Nunez-Solano, Daniel1 (AUTHOR), Kook, Junghwan2 (AUTHOR) jkook@jabra.com, Puyana-Romero, Virginia3 (AUTHOR) |
| المصدر: |
Journal of Mechanical Science & Technology. Oct2023, Vol. 37 Issue 10, p4973-4980. 8p. |
| مصطلحات موضوعية: |
*UNIT cell, *ACOUSTIC wave propagation, *FINITE element method, *SOUND waves, *THEORY of wave motion, *ACOUSTICS, *ACOUSTIC vibrations |
| مستخلص: |
This experimental study investigates the presence of coupled bandgaps for bending and acoustic waves in acoustic-mechanical systems through the analysis of a bandgap structure. The vibrational and acoustic behaviour of a non-planar unit cell with an added acoustic cavity is analyzed using finite element analysis, considering the interaction between acoustics and structure. Band diagrams are utilized to explore the bandgap phenomenon in acoustic, mechanical, and acoustic-structure interaction. Two coupled finite structures, based on specific geometric dimensions, are constructed using a non-planar plate as the mechanical domain, but with different volumes of the acoustic domain. Finite element analysis is employed to evaluate the vibro-acoustic behaviour of these finite structures composed of non-planar unit cells. Additionally, experimental investigations are conducted on micro-milled finite structures to comprehensively analyze the bandgap phenomenon. With these two approaches, the existence of a coupled bandgap is demonstrated, where no wave propagation occurs for both mechanical and acoustic waves. In addition, it is observed that varying the volume of the acoustic domain can adversely affect the coupled bandgap phenomenon. This study contributes valuable insights to the utilization of bandgap structures for vibration reduction in coupled acoustic-mechanical systems. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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