Multi-field coupling and free vibration of a sandwiched functionally-graded piezoelectric semiconductor plate  

作　　者：Xueqian FANG Qilin HE Hongwei MA Changsong ZHU 

机构地区：[1]School of Environment and Civil Engineering,Dongguan University of Technology,Dongguan 523808,Guangdong Province,China [2]Guangdong Provincial Key Laboratory of Intelligent Disaster Prevention and Emergency Technologies for Urban Lifeline Engineering,Dongguan University of Technology,Dongguan 523808,Guangdong Province,China [3]State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2023年第8期1351-1366,共16页应用数学和力学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.12172236 and 12202289)。

摘　　要：Sandwiched functionally-graded piezoelectric semiconductor(FGPS)plates possess high strength and excellent piezoelectric and semiconductor properties,and have significant potential applications in micro-electro-mechanical systems.The multi-field coupling and free vibration of a sandwiched FGPS plate are studied,and the governing equation and natural frequency are derived with the consideration of electron movement.The material properties in the functionally-graded layers are assumed to vary smoothly,and the first-order shear deformation theory is introduced to derive the multi-field coupling in the plate.The total strain energy of the plate is obtained,and the governing equations are presented by using Hamilton’s principle.By introducing the boundary conditions,the coupling physical fields are solved.In numerical examples,the natural frequencies of sandwiched FGPS plates under different geometrical and physical parameters are discussed.It is found that the initial electron density can be used to modulate the natural frequencies and vibrational displacement of sandwiched FGPS plates in the case of nano-size.The effects of the material properties of FGPS layers on the natural frequencies are also examined in detail.

关 键 词：sandwiched piezoelectric semiconductor(PS)plate functionally-graded layer multi-field coupling free vibration Hamilton's principle 

分 类 号：O327[理学—一般力学与力学基础]