Ray Manas C
Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur.
IEEE Trans Ultrason Ferroelectr Freq Control. 2006 Nov;53(11):2152-65. doi: 10.1109/tuffc.2006.155.
This paper deals with the investigation of active, constrained layer damping (ACLD) of smart, functionally graded (FG) plates. The constraining layer of the ACLD treatment is considered to be made of a piezoelectric, fiber-reinforced composite (PFRC) material with enhanced effective piezoelectric coefficient that quantifies the in-plane actuating force due to the electric field applied across the thickness of the layer. The Young's modulus and the mass density of the FG plates are assumed to vary exponentially along the thickness of the plate, and the Poisson's ratio is assumed to be constant over the domain of the plate. A finite-element model has been developed to model the open-loop and closed-loop dynamics of the FG plates integrated with two patches of ACLD treatment. The frequency response of the plates revealed that the active patches of ACLD treatment significantly improve the damping characteristics of the FG plates over the passive damping. Emphasis has been placed on investigating the effect of variation of piezoelectric fiber angle in the constraining layer of the ACLD treatment on the attenuating capability of the patches. The analysis also revealed that the activated patches of the ACLD treatment are more effective in controlling the vibrations of FG plates when the patches are attached to the surface of the FG plates with minimum stiffness than when they are attached to the surface of the same with maximum stiffness.
本文研究了智能功能梯度（FG）板的主动约束层阻尼（ACLD）。ACLD处理的约束层被认为是由具有增强有效压电系数的压电纤维增强复合材料（PFRC）制成，该系数量化了由于在层厚度方向上施加电场而产生的面内驱动力。假设FG板的杨氏模量和质量密度沿板的厚度呈指数变化，并且泊松比在板的整个区域内假定为常数。已开发出一个有限元模型来模拟与两片ACLD处理集成的FG板的开环和闭环动力学。板的频率响应表明，ACLD处理的主动贴片比被动阻尼显著改善了FG板的阻尼特性。重点研究了ACLD处理约束层中压电纤维角度变化对贴片衰减能力的影响。分析还表明，当贴片以最小刚度附着在FG板表面时，ACLD处理的激活贴片在控制FG板振动方面比以最大刚度附着在FG板表面时更有效。
