【作者】 程显文；

【导师】 关群；

【作者基本信息】 合肥工业大学 ， 结构工程， 2006， 硕士

【摘要】 随机压电智能结构振动主动控制是目前结构动力设计与控制研究领域中的一个重要的崭新课题。 本文针对具有随机参数压电智能结构开展了结构动力分析和结构振动主动控制研究。利用压电材料的压电特性来实现对压电结构的振动主动控制,对压电结构开展了有限元动力特性分析和动力响应分析,推导出压电智能结构的动力学有限元方程;在考虑弹性材料和压电材料的物理参数(质量密度和弹性模量)和尺寸参数(宽度和厚度)为随机变量的情况下,对结构进行了基于概率的动力特性分析:在考虑弹性材料和压电材料的物理参数、尺寸参数、外加荷载均为随机变量的情况下,对结构进行了动力响应分析和振动控制分析。 最后,通过两个数值算例验证了文中建立的动力响应分析确定性模型的正确性;通过计算机数值仿真,验证了对压电智能结构振动主动控制的有效性。更多还原

【Abstract】 Active vibration control for piezoelectric intelligent structures is an important task in the field of engineering structural research.In this paper, the research of structural dynamic characteristic analysis, dynamic response analysis and the active vibration control for piezoelectric intelligent structures are studied. Firstly using piezoelectric coupling of piezoelectric materials for active vibration control, a finite element analysis of piezoelectric intelligent structures is developed and a dynamic finite element equation is obtained. Considering the randomness of physics parameters (mass density and elastic module) and geometric parameters (width and thickness) of main structural material and piezoelectric materials, the problem of the structural dynamic characteristic analysis based on probability is studied. The problems of dynamic response analysis of closed loop control system based on reliability for the intelligent beam structures with random parameters were studied, in which the randomness of physics parameters and geometric parameters of materials and applied loads and control forces are considered.The validity of active vibration control for piezoelectric structure with random parameters is demonstrated by means of the computer simulation. And some significant conclusions and results are obtained.更多还原