Электронный каталог

Статья

Zaky, Z.A.
Tailoring Acoustic Waves with Aperiodic Phononic Crystals for Energy Localization / Z.A.Zaky, [a.o.]. – Text : electronic // Journal of Vibration Engineering and Technologies. – 2026. – Vol.14, No. 1. – P. 51. – URL: https://doi.org/10.1007/s42417-025-02221-w. – Bibliogr.: 46.

Background/Introduction Phononic crystals with quasiperiodic architectures, such as those generated by the generalized Thue-Morse sequence, present a promising alternative to periodic structures for controlling sound waves. Their unique spatial arrangements can lead to distinctive acoustic bandgap phenomena and wave localization effects not found in traditional materials. Purpose This work aims to elucidate how the acoustic bandgap properties and energy localization capabilities evolve in quasiperiodic phononic crystals based on the generalized Thue-Morse sequence, with a particular focus on structures featuring multi-resonator unit cells. Methods We designed a series of quasiperiodic structures comprising alternating units of parallel closed/open resonators and single open resonators. The acoustic response of these configurations was systematically analyzed using a combined numerical and analytical approach, employing finite element simulations in COMSOL Multiphysics and the transfer matrix method in MATLAB. Results The investigation across successive sequence generations reveals a clear performance progression. The first generation exhibits narrow bandgaps driven by localized resonances. The second generation develops more refined pseudo-bandgaps and exhibits passband splitting, enabling higher frequency selectivity. Finally, the third generation achieves ultrawide bandgaps, characterized by intricate internal sub-structures and pronounced energy confinement. Furthermore, we establish a direct link between the cross-sectional shape of the resonators and the resulting wave attenuation and localization behavior. Conclusions The synergistic combination of specific resonator geometries with a quasiperiodic organizational scheme offers exceptional command over acoustic wave propagation. This research provides a robust foundational framework for engineering tunable phononic crystals, paving the way for advanced devices in acoustic filtering, broadband noise control, and high-performance vibration isolation.



Спец.(статьи,препринты) = С 326.4 - Коллективные эффекты. Сверхизлучение. Квантовая оптика. Эффект Холла
Спец.(статьи,препринты) = С 17 к - Расчеты по молекулярной динамике. Численное моделирование физических задач
ОИЯИ = ОИЯИ (JINR)2026