包覆型船舶基座声子晶体结构减振特性研究  

Research on Vibration Reduction Characteristics of Phononic Crystal Structure for Covered Ship Foundation

作　　者：钱登辉 朱海星 QIAN Denghui;ZHU Haixing

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212000

出　　处：《江苏船舶》2024年第5期5-8,15,共5页Jiangsu Ship

基　　金：国家自然科学基金资助项目(11847009);江苏省高等学校自然科学研究项目资助(22KJB580005)。

摘　　要：为了对低频段振动进行控制,构建一种立体包覆型三组元声子晶体,并采用有限元法计算其能带结构,研究其特征模态和应力场;然后将该三维声子晶体拆分为一维声子晶体梁和二维声子晶体板,并分别研究相应带隙特性;最后构建三维声子晶体立体结构与一维声子晶体梁、二维声子晶体板之间的潜在带隙形成机理。该结构能够有效实现结构特定范围的低频隔振,在船舶、大型发电机组及其他领域有着很好的应用前景。To control low-frequency vibrations,a three-dimensional encapsulated ternary phononic crystal is constructed,and its band structure is calculated using the finite element method to study its characteristic modes and stress fields.Subsequently,the three-dimensional phononic crystal is decomposed into one-dimensional phononic crystal beams and two-dimensional phononic crystal plates,and their respective bandgap characteristics are studied.Finally,the potential bandgap formation mechanism is constructed between the three-dimensional phononic crystal structure and the one-dimensional phononic crystal beams and two-dimensional phononic crystal plates.This structure can effectively achieve low-frequency vibration isolation within a specific range of the structure and has promising applications in ships,large generator sets,and other fields.

关 键 词：声子晶体 带隙特性 能带结构 减振特性 Brillouin区 

分 类 号：TB53[理学—物理] U661.44[理学—声学]