智能压电结构的新型阻尼修正模型  

A New Modified Damping Model of Smart Material Structure with PZT Actuator

作　　者：詹训慧[1] 王永[1] 

机构地区：[1]中国科学技术大学自动化系,安徽合肥230027

出　　处：《实验力学》2007年第5期539-545,共7页Journal of Experimental Mechanics

摘　　要：针对智能压电结构中,结构和压电材料之间的耦合和压电材料的动态输出,对结构阻尼的影响,提出了一种新的分段阻尼模型。由于压电结构和系统之间的耦合效应,整个结构的刚度和阻尼都会发生变化,尤其是阻尼会发生动态的变化。静态阻尼模型的描述已不能满足描述需要,而文中的分段阻尼模型能更精确地描述智能压电结构中的阻尼,以及系统的动态响应。以悬臂梁为例,实验结果验证了原静态阻尼模型的误差较大,而新模型比原模型精确反映了系统的幅频相应,比原模型更加合理和准确。This paper proposes a piecewise model for dynamic damping, considering the structure damping changed by the PZT＇s dynamical output and the coupling effect between the structure and PZT material in the smart material structure. Due to the coupling effect, the rigidity and damping of the whole structure will change. The static viscosity damping model thus cannot accurately describe the whole structure. On the contrary, the proposed model offers an accurate description for the dynamic output and system magnitude response of the integrated PZT systems, which was verified by experiment results of clamped beam considering three modes.

关 键 词：智能结构 阻尼修正模型 耦合效应 动态输出 压电作动器 

分 类 号：TB535[理学—物理]