环肋双叶声学黑洞圆柱壳振动特性分析  

Vibration characterization of cylindrical shells for ring-ribbed double-leaf acoustic black holes

作　　者：郭佳明 汤纪成 姚思彤 田阿利[1] GUO Jiaming;TANG Jicheng;YAO Sitong;TIAN Ali(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212100

出　　处：《舰船科学技术》2025年第4期66-70,共5页Ship Science and Technology

基　　金：国家自然科学基金资助项目(52001145)。

摘　　要：声学黑洞效应常用于结构的振动控制,因其特殊的构造形式往往会导致结构强度减弱。本文提出一种内嵌环肋双叶声学黑洞的圆柱壳体设计,以降低结构中弯曲波的传播,为回转体结构的减振降噪提供新的解决思路。与传统均质圆柱壳相比,该设计显著抑制了弯曲波的传递。通过控制变量法,研究截断厚度、幂律指数和环肋宽度结构参数对振动传播的影响。结果表明,增加截断厚度和环肋宽度会将振动传输衰减的峰值移向高频,而提高幂律指数则使衰减峰移至低频。同时,结合声学黑洞聚波特性在特定区域附加阻尼层,通过仿真验证了其减振效果,证明阻尼层可在部分频率下进一步提升振动衰减。The acoustic black hole effect is commonly used for vibration control of structures,which often leads to weakening of structural strength due to its special construction form.In this paper,a cylindrical shell design with embedded ring-ribbed double-leaf acoustic black holes is proposed to reduce the propagation of bending waves in the structure and provide a new solution idea for vibration and noise reduction of rotating body structures.The design significantly suppresses the transmission of bending waves compared to the conventional homogeneous cylindrical shell.The effects of the structural parameters of truncation thickness,power-law exponent and annular rib width on vibration propagation were investigated by the control variable method.The results show that increasing the truncation thickness and ring rib width shifts the peak of vi-bration transmission attenuation to high frequencies,while increasing the power-law index shifts the attenuation peak to low frequencies.At the same time,the damping layer is attached to a specific region in combination with the acoustic black hole wave gathering property,and its vibration damping effect is verified by simulation,which proves that the damping layer can further enhance the vibration attenuation at some frequencies.

关 键 词：声学黑洞 圆柱壳 振动控制 有限元法 

分 类 号：U663.1[交通运输工程—船舶及航道工程]