摘要
随着本世纪以来航天事业的不断发展,智能材料和智能结构越来越受到人们的关注。自适应结构作为智能结构被广泛的应用于航空、航天、航海、建筑、汽车等领域。随着电子计算机技术的发展和有限元理论的逐渐成熟,有限元方法开始被用来分析智能结构的力学行为。本文利用有限元方法针对压电复合材料层合板自适应结构展开静力变形分析及控制研究。首先,本文介绍了压电材料目前在国内外研究应用的基本概况及压电效应原理;其次,文章对复合材料层合板进行了弹性分析并建立了含有压电层的复合材料层合板的有限元模型,导出了静力变形的有限元方程;在此基础上,根据压电材料的传感作动原理对复合材料层合板在静力作用下的变形进行分析和控制,编写了MATLAB计算程序,并用ANSYS软件作了仿真分析;最后,分析研究结果表明,压电层合板的变形状况有了明显的改善,说明此模型的有效性。
As the space industry getting developed significantly, intelligent materials and intelligent structures have seized more and more people’s attention. Adaptive structure as intelligent structure have been widely used in aviation, aerospace, marine, construction, automotive and other fields. Along with the development of computer technology and the maturity of finite element theory, finite element method has been used to analyze the mechanical behavior of intelligent structures. In this paper, finite element method has been adopted to analyze the static deformation and control of the adaptive structure laminates which is consisted by piezoelectric and composites materials. Firstly, the current global situation of the research and application of piezoelectric materials and piezoelectric equations are introduced. Secondly, an elastic analysis of composite laminates are made and finite element model which contained piezoelectric layer is established and the finite element equations of static deformation is derived. On the basis of the research mentioned above, according to the sensing and actuating principle of piezoelectric materials, the static deformation of laminates are analyzed and controlled by writing an MATLAB computer program and a simulation using ANSYS software is made. The final results show that the deformation of piezoelectric laminates recovered significantly and the model is valid.
引文
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