【作者】 陈建峰；

【导师】 余音；

【作者基本信息】 上海交通大学 ， 工程力学， 2007， 硕士

【摘要】 本文研究船舶智能结构振动反馈控制的分析与数值仿真问题。针对通用有限元软件缺乏对工程智能结构的分析能力及控制控制仿真能力,进行了程序开发,包括用Visual Fortran语言编译有限元计算程序;以及在通用有限元软件ANSYS的基础上开发压电壳单元的功能。利用程序开发的成果,研究了船舶智能结构振动反馈控制。首先叙述了智能结构的构成,以及其组成材料的特性和本构理论,描述了压电材料的正,逆压电效应和压电方程。针对大型商业软件中没有压电壳单元给船舶智能结构的研究带来的困难,本文建立了考虑拉伸与弯曲位移自由度和电势自由度的四节点复合材料平板单元,并利用能量原理导出的复合材料板壳型智能结构的有限元动力学、静力学运动方程,以及作动器和传感器的有限元方程,用Visual Fortran语言编译了复合材料板壳型智能结构有限元计算程序。能够分析复合材料板壳结构在机、电耦合作用下的面内变形和弯曲变形。此外我们在研究中发现,层合板湿热分析的本构方程和压电分析的本构方程非常相似,经过适当的变形,可以设法借用通用软件ANSYS中已有的湿热单元的功能来实现压电单元的一般常用功能。本文还利用ANSYS中的ANSYS Parametric Design Language (APDL)构造了一个振动反馈控制系统,可以进行比例反馈控制和恒值反馈控更多还原

【Abstract】 The analysis and numerical imitation of vibration feedback control of smart marine structure was studied in this dissertation. The analytical program exploitations was carried through, including compiling and editing the smart structure FEA code on Visual Fortran, and the secondary exploiting for smart structure analysis on commercial software ANSYS, as the insufficiency of the capability of smart structure analysis and control imitation in commercial finite element analysis software. And the programs developed were used to investigate the vibration feed-back control of marine smart structure.First of all, the construction of smart structure and the characteristics and constitution mechanism of the component materials was described. And the direct and inverse piezoelectric effect and equations were stated.Because there was no piezoelectric shell element in current commercial software, it would be difficult to analyze the smart marine structure. In this paper, a four-node composite plate element with extension and bending displacement and electrical degrees of freedom was established, and a finite element analysis program of smart structure was compiled by Visual Fortran. The in plane and out plane deflection of the composite laminate bearing the mechanical and electrical load could更多还原