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用局部压电层控制约束阻尼约束层产生一种新的主、被动杂交控制形式,称为可控约束层。本文根据弹性材料、粘弹性材料、压电材料的本构关系和变形连续条件,建立了可控约束阻尼层板的控制微分方程;从理论上证明了用离散小压电片组合来代替整体压电层而不影响作动效果,改善了结构的工艺性;利用Galerkin 方法和GHM方法建立了系统的近似低阶控制方程;对一试验模型进行了控制数值模拟和试验实现,结果表明这种杂交控制方式对抑制板的振动有较好的效果,且控制频带宽,可靠性高。
The local piezoelectric layer control constraint damping constraint layer to produce a new form of active and passive hybrid control, known as the controllable constraint layer. In this paper, the governing differential equations of controllable constrained damping laminae are established based on the constitutive relations of elastic materials, viscoelastic materials, piezoelectric materials and deformation continuous conditions. It is theoretically proved that the combination of discrete small piezoelectric sheets instead of integral pressure Electric layer without affecting the moving effect and improve the structure of the technology; the use of Galerkin method and the GHM method to establish approximate lower order control equations of the system; a test model was controlled numerical simulation and experimental results show that this hybrid The control mode has a good effect on suppressing the vibration of the board, and the control frequency bandwidth is high, and the reliability is high.