In this work, the damping characteristics of an actively constrained viscoelastic material layer are examined because of the inclusion of dispersed graphite particles within the viscoelastic material layer. The study is carried out by analysing the active–passive damping in a layered plate made of a substrate layer, a constrained viscoelastic particulate composite layer and a thin constraining piezoelectric actuator layer. The effective properties of the viscoelastic particulate composite are estimated using a differential scheme and the elastic–viscoelastic correspondence principle. The piezoelectric layer is activated according to the velocity feedback control law, and a closed-loop finite element model of the overall plate is derived for the analysis. The results reveal that the inclusion of graphite particles not only causes an improved transfer of active action from the piezoelectric layer to the substrate plate but also enhances the energy dissipation capability of the constrained viscoelastic layer. It is found that the maximum transfer of active action and the maximum passive damping capability of the viscoelastic particulate composite layer arise almost at the same volume fraction of inclusion. So, an optimal volume fraction of inclusion is obtained for significantly improved active–passive damping in the overall plate. The overall study presents a potential means of improved active–passive damping treatment of structural vibration.

在这项工作中，由于粘弹性材料层中包含分散的石墨颗粒，因此研究了主动约束粘弹性材料层的阻尼特性。该研究是通过分析由基底层，约束粘弹性颗粒复合材料层和约束压电致动器薄层组成的叠层板中的主动-被动阻尼来进行的。使用微分方案和弹性-粘弹性对应原理估算粘弹性颗粒复合材料的有效性能。根据速度反馈控制律激活压电层，并导出整个板的闭环有限元模型以进行分析。结果表明，包含石墨颗粒不仅导致改善了从压电层到基板的主动作用的转移，而且增强了约束粘弹性层的能量耗散能力。发现粘弹性颗粒复合材料层的最大的主动作用传递和最大的被动阻尼能力几乎在夹杂物的相同体积分数下出现。因此，获得了最佳的夹杂物体积分数，以显着改善整个板块的主动-被动阻尼。总体研究提出了改进结构振动主动-被动阻尼处理的潜在手段。