摘要
通过建立声子晶体负泊松比蜂窝基座的等效动力学模型,研究该基座局域共振减振机理。探讨动力学参数(固有频率比、质量比、阻尼比)、声子晶体的周期层数等对基座减振性能的影响规律。研究结果表明,当声子晶体固有频率与基座固有频率接近时,能有效降低基座发生结构共振时的响应幅值。建立声子晶体蜂窝基座的优化设计模型,优化得到具有指定局域共振固有频率的声子晶体结构。动力学频响计算表明,该优化设计基座能够有效抑制结构的低频共振现象。
In this paper,the local resonance reduction mechanism of phononic crystal cellular mount with auxetic effects is studied by establishing the dynamic model.The influence of the dynamic parameters(natural frequency ratio,mass ratio and damping ratio)on the vibration reduction performance of this mount is analyzed.It was shown that the frequency response of the cellular mount in the vicinity of the resonant frequency can be effectively reduced when the natural frequency of the phononic crystal is close to the natural frequency of the cellular mount.Then,the optimization design model of the phononic crystal auxetic cellular mount is established,and the phononic crystal structure with the specified local resonant frequency is obtained.The dynamic frequency response characteristics of this novel mount are calculated,which shows that the novel mount has better vibration reduction performance in low frequency resonance.
作者
秦浩星
杨德庆
QIN Hao-xing;YANG De-qing(Collaborative Innovation Center for Advanced Ship and Deep-sea Exploration;State Key Laboratory of Ocean Engineering;School of Naval Architecture,Oceanand Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2019年第3期421-430,共10页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51479115)
海洋工程国家重点实验室课题(GKZD010071)
高技术船舶科研计划项目(K24367)
关键词
减振
声子晶体
负泊松比
蜂窝
基座
vibration reduction
phononic crystal
auxetic
cellular
mount
