基于局域共振型声子晶体塔筒结构海上风机减振特性研究  

Vibration Reduction Characteristics of OffshoreWind Turbines Based on Locally Resonant Phononic Crystal Tower Structure

作　　者：张健[1] 沈伟明 钱登辉 ZHANG Jian;SHEN Weiming;QIAN Denghui(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,Jiangsu,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：《噪声与振动控制》2024年第1期1-6,共6页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51979130,11847009);中国科协青年人才托举工程资助项目(2022QNRC001);江苏省高等学校自然科学研究资助项目(22KJB80005)。

摘　　要：针对海上风机的振动控制问题,提出一种局域共振型声子晶体塔筒结构,基于周期结构的Bloch定理,采用有限元法计算该结构的能带结构、特征模态所对应的位移场以及相应有限周期声子晶体塔筒结构的振动传输曲线,对其展现出的带隙特性进行分析。基于局域共振带隙的形成,研究声子晶体塔筒结构的振动控制问题,可将其应用于不同海洋环境中海上风机特定频率的减振。得出声子晶体塔筒结构在xy平面内与z方向上受激励时的振动传输曲线,选取两者在特定频率下的结构位移图分别进行分析,计算出非理想化声子晶体塔筒结构在xy平面内与z方向上受激励时的振动传输曲线并加以对比。研究各参数对声子晶体塔筒结构带隙衰减频段的影响规律,通过合理调整设计参数,可以实现结构特定范围内的低频隔振,证明其在复杂海洋环境中海上风机减振方面具有很好的应用前景。In view of the offshore wind turbine vibration control problems,a kind of locally resonant phononic crystal tower structure is put forward.Based on the Bloch theorem of periodic structure,the finite element method is used to calculate the band structure,displacement fields of eigenmodes and transmission power curves of the finite period phononic crystal tower structure,its band gap characteristics are analyzed.Based on the formation of locally resonant band gap,the vibration control problems of the phononic crystal tower structure is studied,which can be applied to the vibration reduction of offshore wind turbines at specific frequencies in different marine environments.The transmission power curves of the phononic crystal tower structure in the xy plane and the z direction are obtained,and the structural displacement diagrams at specific frequencies are selected for analyzing.The transmission power curves of non-ideal phononic crystal tower structure in the xy plane and the z direction are calculated and compared.The influence of various parameters on the band gap attenuation band of the phononic crystal tower structure is studied.By adjusting reasonable design parameters,low frequency vibration isolation in a specific range of the structure can be realized,which has a good application prospect in the field of vibration reduction of offshore wind turbines in complex marine environment.

关 键 词：振动与波 声子晶体 海上风机 减振特性 带隙特性 能带结构 

分 类 号：TH113.1[机械工程—机械设计及理论]