光致伸缩层合变体机翼研究
发布时间：2019-06-21 11:21
【摘要】：铁电陶瓷材料在高能量光束的照射下能够产生应变,因此可制作成驱动器或传感器层合于空间梁、板、壳结构或者嵌入结构内部实现对结构的形状控制。相比于由电、磁等信号激发的智能材料制作而成的驱动器(如压电驱动器、电致伸缩作动器、记忆合金等),光致伸缩驱动器由于具有不需要硬线连接、远程控制而且不会引起电磁干扰等优点,所以非常适合在太空环境下对结构施加非接触激励以及控制,且符合航空航天领域轻质化的发展趋势,因此具有重大的研究价值。本文利用不同极化方向的光致伸缩驱动器,针对驱动器在多场耦合下的本构模型、光致伸缩层合梁结构力学建模以及光电层合机翼结构的机翼挠度优化问题开展研究。本文首先阐述了铁电陶瓷材料和光致伸缩驱动器在光-电-力-热等物理场下的耦合效应,分别针对不同极化方向的驱动器本构关系进行分析,建立0-1极化和0-3极化驱动器层合梁结构力学模型。采用光-电-力-热耦合单元建立层合结构的有限元模型,并引入加强假定应变以及假定自然应变模式来改善单元性能。解析方法与有限元方法和采用软件Abaqus计算三种计算结果进行对比表明,建立的力学模型正确、有效,提出的光电单元效率更高,能更好的模拟驱动效果。针对Abaqus软件进行二次开发,编写PLZT材料子程序,搭建软件Abaqus和Matlab联合仿真平台,并在此基础上以柔性机翼结构的位移为目标函数,以粘贴于机翼结构表面的光致伸缩驱动器的位置和数目为设计变量,应用有限元软件和遗传算法设计针对柔性结构的位移优化系统。数值模拟结果验证了该优化方法能很好的实现光电层合机翼结构的位移优化。
[Abstract]:Ferroelectric ceramic materials can produce strain under the irradiation of high energy beam, so they can be fabricated into actuators or sensors laminated in space beam, plate, shell structure or embedded structure to control the shape of the structure. Compared with the actuators made of intelligent materials excited by electrical, magnetic and other signals (such as piezoelectric actuators, electrostrictive actuators, memory alloys, etc.), the photostrictive actuators are very suitable for applying non-contact excitation and control to the structure in the space environment because they do not need hard wire connections, remote control and do not cause electromagnetic interference, and are in line with the development trend of lightweight in the aerospace field. Therefore, it has great research value. In this paper, the constitutive model of the actuator under multi-field coupling, the mechanical modeling of phototelescopic laminated beam structure and the optimization of wing deflection of optoelectronic laminated wing structure are studied by using phototelescopic actuators with different polarization directions. In this paper, the coupling effect of ferroelectric ceramic materials and photostrictive actuators in optical-electric-force-thermal and other physical fields is described. The constitutive relations of actuators in different polarization directions are analyzed, and the mechanical models of 0 鈮，
本文编号：2504039
[Abstract]:Ferroelectric ceramic materials can produce strain under the irradiation of high energy beam, so they can be fabricated into actuators or sensors laminated in space beam, plate, shell structure or embedded structure to control the shape of the structure. Compared with the actuators made of intelligent materials excited by electrical, magnetic and other signals (such as piezoelectric actuators, electrostrictive actuators, memory alloys, etc.), the photostrictive actuators are very suitable for applying non-contact excitation and control to the structure in the space environment because they do not need hard wire connections, remote control and do not cause electromagnetic interference, and are in line with the development trend of lightweight in the aerospace field. Therefore, it has great research value. In this paper, the constitutive model of the actuator under multi-field coupling, the mechanical modeling of phototelescopic laminated beam structure and the optimization of wing deflection of optoelectronic laminated wing structure are studied by using phototelescopic actuators with different polarization directions. In this paper, the coupling effect of ferroelectric ceramic materials and photostrictive actuators in optical-electric-force-thermal and other physical fields is described. The constitutive relations of actuators in different polarization directions are analyzed, and the mechanical models of 0 鈮，
本文编号：2504039
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