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首页> 外文期刊>Composite Structures >Hybrid damping treatment of a layered beam using a particle-filled viscoelastic composite layer
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Hybrid damping treatment of a layered beam using a particle-filled viscoelastic composite layer

机译：使用颗粒填充粘弹性复合层的分层梁的混合阻尼处理

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摘要

This work deals with the damping capability of an actively constrained viscoelastic particulate composite (VEPC) layer in attenuation of vibration of a beam element. The overall beam is composed in the layered form where VEPC layer is constrained between the substrate beam and extension actuated piezoelectric layer. The VEPC layer is a graphite particle-filled viscoelastic composite layer and its effective properties are estimated using differential scheme and elastic?viscoelastic correspondence principle. Based on the theoretically esti-mated effective properties of VEPC and the velocity feedback control law, a closed-loop finite element (FE) model of the layered beam is derived, and the active?passive damping characteristics of the overall beam are analysed by varying the volume fraction of inclusion (VFI) of graphite particles within constrained vis-coelastic layer. It is found that the inclusion of graphite particles not only causes an improved transfer of active action from the piezoelectric layer to the substrate beam but also enhances the passive action through con-strained viscoelastic layer. However, maximum active and passive actions appear at an optimal VFI so that a significantly augmented hybrid active?passive damping is achieved. The overall study presents the augmented damping capability of the hybrid damping treatment through the proposition of a VEPC layer.
机译：该工作涉及主动约束的粘弹性颗粒复合物（VEPC）层的阻尼能力在梁元件的振动衰减时。整体光束以分层形式组成，其中Vepc层被限制在基板束和延伸致动压电层之间。 VEPC层是石墨填充的粘弹性复合层，并使用差分方案和弹性β粘弹性原理估计其有效性。基于VEPC的理论估计和速度反馈控制规律，推导了分层光束的闭环有限元（FE）模型，并且通过变化分析了整体光束的有源抖动的钝化阻尼特性在约束的VIS - 皮级基层内石墨颗粒的夹杂物（VFI）的体积分数。发现包括石墨颗粒的包含不仅导致从压电层到基板束的改善的主动作用传递，而且还通过排应粘弹性层增强被动作用。然而，最大主动和被动动作出现在最佳VFI处，因此实现了显着增强的混合动力激活？被动阻尼。整体研究通过PEPC层的命题提出了混合阻尼处理的增强阻尼能力。

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