具有无序尺寸肋骨配置的加筋圆柱壳振动局域化  

Localization of vibration on a framed cylindrical shell with irregular stiffener size configuration

作　　者：纪刚[1] 赵鹏 谭路[1] 黄纯文[2] JI Gang;ZHAO Peng;TAN Lu;HUANG Chun-wen(Department of Naval Architecture Engineering,Naval University of Engineering,Wuhan 430033,China;Department of Logistics and Traffic Management,Hubei Communications Vocational and Technical College,Wuhan 430068,China)

机构地区：[1]海军工程大学舰船与海洋学院,湖北武汉430033 [2]湖北交通职业技术学院物流与交通管理学院,湖北武汉430068

出　　处：《振动工程学报》2022年第5期1138-1146,共9页Journal of Vibration Engineering

摘　　要：为控制周期加筋圆柱壳在通带振动的远距离传播问题,拟采取肋骨尺寸无序配置的方式实现将振动局限于振源附近,为此开展了具有肋骨尺寸无序配置的加筋圆柱壳振动局域化研究。为定量预报局域化因子,将加筋圆柱壳各周向模式振动沿轴向的传播等效为耦合振子链的振动传播问题。以加筋圆柱壳有限元振动分析的结果为输入,使用结合波数分析的参数辨识技术给出了等效振子固有频率参数和耦合参数,利用耦合振子链的无序局域化因子公式预报肋骨尺寸无序配置加筋圆柱壳的局域化因子,用于判断振动局域化的发生。为预报局域化因子所需要的肋骨尺寸无序度参数使用了参考模型辨识技术。针对具有无序尺寸肋骨配置的加筋圆柱壳所开展的振动局域化分析结果表明,肋骨尺寸变化能导致单元对地刚度发生改变,从而导致单元固有频率发生改变。因此,肋骨尺寸无序配置可实现振动局域化,具体程度同振动模式、肋骨尺寸无序度参数和频率相关。To confine the vibration energy of a periodically framed cylindrical shell in the pass bands,irregular stiffener size configu‐ration can be used as a control measure.An investigation on localization of a framed cylindrical shell with irregular stiffener size con‐figuration is presented.The vibration of the cylindrical shell is equivalent as a coupled oscillator chain system.Using the vibration results acquired by finite element method as input,resonance frequency parameter and coupling parameter of the equivalent oscilla‐tor chain can be acquired by identification technology combined with wave number analysis.Then the localization factor of the disor‐der configuration model,which is the quantification of localization,can be predicted using the formula derived for the coupled oscil‐lator chain system.The irregular configuration stiffener size parameter can be acquired using reference model identification technolo‐gy.Analysis of the framed cylindrical shells with irregular stiffener size configuration shows that,vibration can be confined to the source due to the element ground stiffness irregularity.The degree of localization is related to vibration mode,irregularity configu‐ration parameter and frequency parameter.

关 键 词：振动控制 振动衰减 加筋圆柱壳 无序结构 局域化 

分 类 号：O328[理学—一般力学与力学基础] U661.44[理学—力学]