【摘要】 基于夹层结构的Mead-Markus基本假设,使用假设模态法对部分主动约束阻尼覆盖的梁结构进行建模和计算,并与有限元结果进行比较。重点研究压电层厚度、阻尼层厚度、ACLD长度和位置对模态损耗因子的影响。研究表明,适当增加压电层厚度,减小阻尼层厚度,增加ACLD长度有利于增强阻尼效果。更多还原

【Abstract】 Based on the Mead-Markus assumptions, the assumed mode method (AMM) was used to model a partially ACLD beam. And the validity and effectiveness of AMM were examined by comparing the results with those of FEM. Furthermore, the geometrical effects of a ACLD patch, such as, PZT thickness, VEM thickness, its location and length on natural frequencies and modal loss factors of the beam were also studied. It seemed that it is useful for damping effect to increase PZT thickness, reduce VEM thickness and extend the length of the ACLD patch.更多还原