声学黑洞耦合动力吸振器复合梁振动特性研究  

Vibration Properties Investigation of an Acoustic Black Hole Beam with Dynamic Vibration Absorber

作　　者：邓风帆 贾秀娴 于野 华春蓉[1] 解元伟 

机构地区：[1]西南交通大学机械工程学院,四川 成都 [2]西华大学汽车测控与安全四川省重点实验室,四川 成都

出　　处：《机械工程与技术》2024年第3期215-225,共11页Mechanical Engineering and Technology

摘　　要：近些年,声学黑洞(Acoustic Black Hole, ABH)结构由于其在控制结构振动和噪声上的优异表现,得到了广泛的关注。将动力吸振器(Dynamic Vibration Absorber, DVA)和声学黑洞理论结合,可以在包括低频的宽频带内实现更好的减振效果。首先针对ABH结构梁第二阶共振频率设计并测试DVA,并通过振动实验分别测试ABH结构梁附加DVA (ABH + DVA)与附加阻尼层(ABH + Damp)的减振控制效果。然后,建立有限元模型并用实验结果进行验证。最后通过有限元计算,研究了ABH + DVA的宽频减振性能以及DVA参数对减振效果的影响。结果证明,ABH + DVA在目标频率附近有着更好的减振效果,并且在非目标频率的其他高频共振峰也能实现振动控制。In recent years, acoustic black hole (ABH) structures have attracted much attention due to their excellent performance in controlling structural vibration and noise. The combination of Dynamic Vibration Absorber (DVA) and acoustic black hole theory can effectively suppress the vibration response over a wide frequency band, including low frequencies. Firstly, the DVA is designed and tested for the second resonance frequency of the ABH beam, and the vibration damping effect of the additional DVA (ABH + DVA) and the damping layer (ABH + Damp) of the ABH beam was tested by vibration experiments. Then, the finite element model is developed and verified through the experimental results. Finally, the wide-band vibration damping characteristic of ABH + DVA and the influence of DVA parameters on the vibration damping effect are studied by finite element calculation. The results show that ABH + DVA has vibration attenuation advantages near the target frequency and also can achieve vibration reduction at other higher and non-target resonant frequencies.

关 键 词：车辆工程 声学黑洞 动力吸振器 减振降噪 有限元计算 振动试验 

分 类 号：TB5[理学—物理]