声学黑洞在圆柱壳上的应用及结构优化研究  

Application and Structural Optimization of Acoustic Black Holesin Cylindrical Shells

作　　者：魏建红[1,2] 向阳[1,2] 廖琳 张春吉 WEI Jianhong;XIANG Yang;LIAO Lin;ZHANG Chunji(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Key Laboratory of High Performance Ship Technology,Ministry of Education,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,武汉430063 [2]武汉理工大学高性能船舶技术教育部重点实验室,武汉430063

出　　处：《噪声与振动控制》2023年第5期59-65,共7页Noise and Vibration Control

基　　金：工信部资助项目(MC-201917-C09);国家自然科学基金资助项目(52241102)。

摘　　要：针对声学黑洞(AcousticBlackHole,ABH)在圆柱壳结构上的应用问题,首先采用有限元法分析嵌入ABH的圆柱壳结构的振动特性并讨论不同结构尺寸对其振动特性的影响。随后对结构开展进一步研究,在嵌入ABH的圆柱壳结构外布置局域振子,分析其振动特性,并讨论不同材料振子及振子不同的质量分布对结构振动特性的影响。结果表明:相比原结构,嵌入ABH的圆柱壳结构的振动传递损失增加;当结构内径增大时,振动峰值向高频移动,振动衰减增大;在嵌入ABH的结构外侧附加振子使其发生局域共振可增加振动衰减,改善结构的振动特性;若采用不同材料振子,其质量增大时,振动衰减会向低频移动;随着振子外侧质量向中心集中,结构固有频率随之降低,振动衰减前移,可知振子质量及刚度参数对结构的振动特性有较大影响。The application of Acoustic black hole(ABH)to cylindrical shell structures is studied.First of all,the finite element method is used to analyze the vibration characteristics of the cylindrical shell structures with ABH embedded and the influence of different structure sizes on the vibration characteristics is discussed.Then,local oscillators are arranged outside the structure to analyze its vibration characteristics,and the influence of different material and mass distributions of the oscillators on the vibration characteristics is discussed.Results indicate that:compared with the ordinary structure,the vibration transmission loss of the structure embedded with ABH has a larger increase;When the inner diameter of the structure increases,the vibration peak shifts towards high frequency side and the vibration attenuation increases;Adding additional oscillators outside the structure with ABH embedded can cause the local resonance which can increase the vibration attenuation and improve the vibration characteristics;When the mass of the oscillator increases,the attenuation frequency decreases;With the concentration of the mass outside the vibrator towards the center,the natural frequency of the structure decreases,and the vibration attenuation moves forward.It can be concluded that the mass and stiffness parameters of the vibrator have a great influence on the vibration characteristics of the structure.

关 键 词：声学 声学黑洞 圆柱壳结构 振动传递特性 局域共振 

分 类 号：O326[理学—一般力学与力学基础] TB535[理学—力学]