人工晶体学报2025，Vol.54Issue(12)：2127-2135,9.DOI:10.16553/j.cnki.issn1000-985x.2025.0138
三螺旋梁声子晶体的低频带隙仿真研究
Simulation Study of Low-Frequency Bandgap for Triple Helix Beam Phononic Crystal
摘要
Abstract
To mitigate low-frequency vibrational disturbances in engineering applications,this study proposes a triple-helix beam phononic crystal configuration,comprehensive finite element analysis and equivalent modeling demonstrating its superior low-frequency vibration attenuation characteristics.The results indicate that the phononic crystal exhibits a complete bandgap in the range of 47～99 Hz.Within this bandgap,the effective mass became negative,confirming the full reflection vibration isolation mechanism.Transmission loss simulations further corroborate substantial vibration energy attenuation across the bandgap frequencies.Additionally,the phononic crystals demonstrate robust vibration isolation performance under diverse loading conditions,including distributed,concentrated,and torsional loads.The parametric optimization study reveals that precise adjustment of the helix plate thickness,groove width and cylindrical oscillator radius enabled the realization of the band structure with lower frequency and significantly greater bandwidth.This study provides valuable insights and practical engineering significance for low-frequency vibration mitigation.关键词
声子晶体/局域共振/低频减振/带隙特性/等效质量/传输损耗Key words
phononic crystal/local resonance/low-frequency vibration reduction/bandgap characteristic/equivalent quality/transmission loss分类
数理科学引用本文复制引用
XUE Jingyi,HU Qiguo,YAN Zhaoqiang,LIU Ying,ZHANG Pizhu..三螺旋梁声子晶体的低频带隙仿真研究[J].人工晶体学报,2025,54(12):2127-2135,9.基金项目
国家自然科学基金(52175042) （52175042）
