广西科技大学学报2024，Vol.35Issue(2)：1-8,24,9.DOI:10.16375/j.cnki.cn45-1395/t.2024.02.001
基于分段声学黑洞板件的振动特性分析
Vibration characterization analysis on segmented acoustic black hole plates
摘要
Abstract
Due to the existence of truncation in the non-ideal acoustic black hole structure,bending wave will form reflection when it reaches the truncation,which leads to the weakening of vibration suppression effect.Aiming at the bending wave reflection problem,this paper proposes a segmented acoustic black hole structure,and uses the finite element method to carry out harmonic response analysis and calculate the vibration velocity response at different frequencies.The results show that compared with the traditional acoustic black hole structure and uniform plate structure,the segmented acoustic black hole plate has a stronger energy aggregation effect at the black hole arrangement,the bending wave reflection problem is effectively solved,and better vibration suppression effect is shown at the uniform place far away from the black hole structure.Meanwhile,the effects of the applied damping layer and the black hole material properties on the vibration control are investigated,and the results show that the increase of the damping layer size and thickness can improve the vibration damping effect.The increase of material stiffness can also further enhance the vibration damping ability of the structure.This research can provide an idea for the structural design of new acoustic black holes.关键词
分段声学黑洞/振动特性/阻尼/振动速度响应Key words
segmented acoustic black holes/vibration characteristics/damping/vibration velocity response分类
通用工业技术引用本文复制引用
张博强,张强强,金鑫..基于分段声学黑洞板件的振动特性分析[J].广西科技大学学报,2024,35(2):1-8,24,9.基金项目
河南省科技研发计划联合基金项目(222103810086)资助 （222103810086）
