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 estimated 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 viscoelastic 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 constrained 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.

这项工作涉及梁单元振动衰减中主动约束的粘弹性颗粒复合材料（VEPC）层的阻尼能力。整个束以分层形式构成，其中VEPC层被约束在衬底束和扩展驱动的压电层之间。VEPC层是填充石墨颗粒的粘弹性复合层，其有效特性是使用微分方案和弹性-粘弹性对应原理估算的。根据VEPC的理论估算有效特性和速度反馈控制律，得出层状梁的闭环有限元（FE）模型，通过改变约束粘弹性层中石墨颗粒的夹杂物体积分数（VFI）来分析整个梁的主动-被动阻尼特性。已经发现，包含石墨颗粒不仅引起从压电层到基体梁的主动作用的改善，而且通过受约束的粘弹性层增强了被动作用。但是，最大的主动和被动作用会出现在最佳VFI上，从而可以显着增强混合主动－被动阻尼。总体研究通过提出VEPC层提出了混合阻尼处理的增强阻尼能力。已经发现，包含石墨颗粒不仅引起从压电层到基体梁的主动作用的改善，而且通过受约束的粘弹性层增强了被动作用。但是，最大的主动和被动作用会出现在最佳VFI上，从而可以显着增强混合主动－被动阻尼。总体研究通过提出VEPC层提出了混合阻尼处理的增强阻尼能力。已经发现，包含石墨颗粒不仅引起从压电层到基体梁的主动作用的改善，而且通过受约束的粘弹性层增强了被动作用。但是，最大的主动和被动作用会出现在最佳VFI上，从而可以显着增强混合主动－被动阻尼。总体研究通过提出VEPC层提出了混合阻尼处理的增强阻尼能力。