利用厚度剪切压电效应的自适应压电复合材料夹芯结构的研究

STUDY ON ADAPTIVE SANDWICH STRUCTURE EMBEDDING PIEZOELECTRIC COMPOSITES USING THICKNESS SHEAR MODE

提出了利用厚度剪切压电效应的压电复合材料（ＰＣＭＴＳ）作为夹芯结构芯材的新型驱动方式，分析了ＰＣＭＴＳ的驱动原理。针对含有１－３ 型ＰＣＭＴＳ芯材的夹芯梁结构，实验研究了ＰＣＭＴＳ在静电场作用下的驱动特性，并利用ＰＣＭＴＳ芯材对夹芯梁的振动进行了主动控制实验。结果表明，利用ＰＣＭＴＳ作为驱动元件，夹芯梁获得了比较理想的变形量，其振动也能得到较为有效的控制，因此是一种很有应用前途的驱动方式。

type piezoelectric composites using thickness shear mode (PCMTS) were selected as the cores of the sandwich structure, which can generate the thickness shear deformation and actuate the sandwich structure to give rise to the desired transverse deflection. The actuating principle of the PCMTS cores was analyzed, and the experimental investigations were carried out to evaluate the sandwich beam characteristics featuring the actuation of the PCMTS cores. Meanwhile, the active vibration control of the sandwich beam with the PCMTS cores was studied. The results indicate that, using the PCMTS cores as the actuators, an ideal deflection of the sandwich beam is generated and the vibration of the sandwich beam is suppressed effectively.