Applied Mathematics and Mechanics (English Edition) ›› 2024, Vol. 45 ›› Issue (11): 1949-1964.doi: https://doi.org/10.1007/s10483-024-3182-9

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Natural frequency analysis of laminated piezoelectric beams with arbitrary polarization directions

Zhi LI1, Cuiying FAN1,*(), Mingkai GUO2, Guoshuai QIN2, Chunsheng LU3, Dongying LIU4, Minghao ZHAO1,5,6   

  1. 1 School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China
    2 School of Electromechanical Engineering, Henan University of Technology, Zhengzhou 450001, China
    3 School of Civil and Mechanical Engineering, Curtin University, Western Australia 6845, Australia
    4 School of Civil Engineering, Guangzhou University, Guangzhou 510006, China
    5 Henan Province Industrial Science & Technology Institute for Anti-fatigue Manufacturing, Zhengzhou 450001, China
    6 Henan Province Engineering Research Center of Anti-fatigue Manufacturing Technology, Zhengzhou 450001, China
  • Received:2024-07-01 Online:2024-11-03 Published:2024-10-30
  • Contact: Cuiying FAN E-mail:fancy@zzu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(12272353);the National Natural Science Foundation of China(12002316);the Key Scientific and Technological Research Projects in Henan Province of China(232102211075);Project supported by the National Natural Science Foundation of China (Nos. 12272353 and 12002316) and the Key Scientific and Technological Research Projects in Henan Province of China (No. 232102211075)

Abstract:

Piezoelectric devices exhibit unique properties that vary with different vibration modes, closely influenced by their polarization direction. This paper presents an analysis on the free vibration of laminated piezoelectric beams with varying polarization directions, using a state-space-based differential quadrature method. First, based on the electro-elasticity theory, the state-space method is extended to anisotropic piezoelectric materials, establishing state-space equations for arbitrary polarized piezoelectric beams. A semi-analytical solution for the natural frequency is then obtained via the differential quadrature method. The study commences by examining the impact of a uniform polarization direction, and then proceeds to analyze six polarization schemes relevant to the current research and applications. Additionally, the effects of geometric dimensions and gradient index on the natural frequencies are explored. The numerical results demonstrate that varying the polarization direction can significantly influence the natural frequencies, offering distinct advantages for piezoelectric elements with different polarizations. This research provides both theoretical insights and numerical methods for the structural design of piezoelectric devices.

Key words: piezoelectric laminated beam, free vibration, arbitrary polarization, state-space equation, differential quadrature method, natural frequency

2010 MSC Number: 

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