可调频超结构充液管道的振动抑制  

Vibration suppression of tunable frequency metastructure fluid-filled pipeline

作　　者：王可心 杨智春[1,3] 赵天 徐艳龙[1] 田玮 WANG Kexin;YANG Zhichun;ZHAO Tian;XU Yanlong;TIAN Wei(School of Aeronautics,Northwestern Polytechnic University,Xi’an 710072,China;The Institute of Xi’an Aerospace Solid Propulsion,Xi’an 710025,China;National Key Laboratory of Strength and Structural Integrity,Xi’an 710072,China)

机构地区：[1]西北工业大学航空学院,西安710072 [2]西安航天动力技术研究所,西安710025 [3]强度与结构完整性全国重点实验室,西安710072

出　　处：《振动与冲击》2024年第13期180-189,共10页Journal of Vibration and Shock

基　　金：国家自然科学基金(11972296,12372169)。

摘　　要：提出了一种附加可调频局域共振单元的超结构充液管道,通过调整局域共振单元的质量块在弹簧片上的安装位置,实现局域共振单元固有频率的可调性,进而实现充液管道在多个频率下的振动抑制。首先建立了附加可调频局域共振单元的超结构充液管道的结构动力学模型,采用伽辽金法推导了超结构充液管道的运动方程,然后利用模态分析方法建立了多频带隙的解析表达式。建立了相应的有限元模型,对其多频减振特性进行数值仿真,并开展了相应的验证试验。计算和试验结果验证了所提出的超结构充液管道存在多个带隙,在带隙范围内充液管道的弯曲振动被显著抑制。研究工作表明,使用可调频局域共振单元能够有效抑制充液管道多个频率下的振动,为其在多目标频段下充液管道的减振应用提供参考。Here,metastructure liquid-filled pipeline with an additional tunable frequency local resonance unit was proposed.By adjusting installation position of mass block of the local resonance unit on spring plate,natural frequency of the local resonance unit could be adjusted to realize vibration suppression of liquid-filled pipeline at multiple frequencies.Firstly,the structural dynamic model of a super-structure fluid-filled pipeline with an additional frequency tunable local resonance unit was established.Its dynamic equation was derived with Galerkin method,and then the analytical expression for multi-frequency band gaps was established with the modal analysis method.The corresponding finite element model was established,and its multi-frequency vibration reduction characteristics were numerically simulated,and the corresponding verification experiments were conducted.The calculation and experimental results showed that the proposed superstructure fluid-filled pipeline has multiple band gaps,and bending vibration of the fluid-filled pipeline is significantly suppressed within the band gap range;using frequency tunable local resonance unit can effectively suppress vibration of the pipeline under multiple frequencies to provide a reference for vibration reduction applications in fluid-filled pipelines under multiple target frequency ranges.

关 键 词：超结构充液管道 多频带隙 可调频局域共振单元 振动抑制 

分 类 号：TB535[理学—物理]