scholarly journals Analysis on Coupled Vibration of a Radially Polarized Piezoelectric Cylindrical Transducer

Sensors ◽  
2017 ◽  
Vol 17 (12) ◽  
pp. 2850 ◽  
Author(s):  
Jie Xu ◽  
Shuyu Lin ◽  
Yan Ma ◽  
Yifan Tang
Keyword(s):  
Coupled Vibration ◽  
Cylindrical Transducer ◽  
Radially Polarized

Effects of electrodes and electrical connections of piezoelectric layers on dynamic characteristics of radially polarized multilayer piezoelectric cylindrical transducers

2018 ◽  
Vol 30 (1) ◽  
pp. 63-81 ◽  
Author(s):  
Jianjun Wang ◽  
Donghuan Liu ◽  
Weijie Li ◽  
Peijun Wei ◽  
Lihua Tang
Keyword(s):  
Dynamic Characteristics ◽  
Structural Characteristics ◽  
Smart Devices ◽  
Underwater Sound ◽  
Element Analysis ◽  
Resonance Frequencies ◽  
Piezoelectric Layers ◽  
Cylindrical Transducer ◽  
Electrical Connections ◽  
Radially Polarized

Piezoelectric cylindrical transducer is a type of excellent smart devices that can generate radial sound radiation due to its unique structural characteristics and has been widely used for ultrasonic and underwater sound applications. In the design of a piezoelectric cylindrical transducer, especially with the multilayer structure, the electrodes and electrical connections of piezoelectric layers are two key factors affecting the device performance but have not been well evaluated, which result in the inaccurate prediction of dynamic characteristics. This work establishes the exact theoretical models for radially polarized multilayer piezoelectric cylindrical transducers by taking into account the electrodes and electrical connections of piezoelectric layers. Based on the plane stress assumption, the dynamic solutions of the models are derived. Analytical expressions of electric impedances are also derived to obtain the resonance frequencies. In addition, the analytical solutions are validated using the special example in the earlier work and comparing them with the finite element analysis results. Subsequently, the effects of the electrodes and electrical connections of piezoelectric layers on the dynamic characteristics of the transducer are analyzed and discussed. The results show that the electrode thickness, the electrode type, and the parallel and series connections significantly affect the transducer’s performance, thus providing useful guidelines in the design of piezoelectric cylindrical transducers. This work contributes to an overall analysis on the dynamic characteristics of the radially polarized multilayer piezoelectric cylindrical transducers, which is very helpful to improve the performance of two-dimensional emitter and receiver in underwater sound and ultrasonic applications.

Coupled vibration model of cables and its parameter analysis

2015 ◽  
Vol 32 (3) ◽  
pp. 231
Author(s):  
Haitao Liu ◽  
Minghai Wei ◽  
Kun Lin ◽  
Yiqing Xiao
Keyword(s):  
Parameter Analysis ◽  
Coupled Vibration ◽  
Vibration Model

Paraxial Propagation Properties of Radially Polarized Odd‐Pearcey Gaussian Beams in Free Space

2021 ◽  
pp. 2100055
Author(s):  
Mingyue Fang ◽  
Xiang Liao ◽  
Jiajia Zhao ◽  
Chuangjie Xu ◽  
Yixiao Zhang ◽  
...  
Keyword(s):  
Free Space ◽  
Gaussian Beams ◽  
Propagation Properties ◽  
Radially Polarized

Radiation of acoustic pulses from a multimodal cylindrical transducer in an elastic baffle

1994 ◽  
Vol 30 (6) ◽  
pp. 426-432
Author(s):  
A. �. Babaev ◽  
A. A. Leiko ◽  
V. G. Savin
Keyword(s):  
Cylindrical Transducer

Roller–rail parameters on the transverse vibration characteristics of super-high-speed elevators

2019 ◽  
Vol 43 (4) ◽  
pp. 535-543 ◽  
Author(s):  
Shunxin Cao ◽  
Ruijun Zhang ◽  
Shuohua Zhang ◽  
Shuai Qiao ◽  
Dongsheng Cong ◽  
...  
Keyword(s):  
High Speed ◽  
Relative Displacement ◽  
Guide Rail ◽  
Coupled Vibration ◽  
Vibration Acceleration ◽  
Vibration Model ◽  
Vibration Problems ◽  
Equivalent Method ◽  
Relationship Of ◽  
The Relationship

Interaction and wear between wheel and rail become increasingly serious with the increase in elevator speed and load. Uneven roller surface, eccentricity of rollers, and the looseness of rail brackets result in serious vibration problems of high-speed and super-high-speed elevators. Therefore, the forced vibration differential equation representing elevator guide rails is established based on Bernoulli–Euler theory, and the vibration equation of the elevator guide shoes and the car is constructed using the Darren Bell principle. Then, the coupled vibration model of guide rail, guide shoes, and car can be obtained using the relationship of force and relative displacement among these components. The roller–rail parameters are introduced into the established coupled vibration model using the model equivalent method. Then, the influence of roller–rail parameters on the horizontal vibration of super-high-speed elevator cars is investigated. Roller eccentricity and the vibration acceleration of the car present a linear correlation, with the amplitude of the car vibration acceleration increasing with the eccentricity of the roller. A nonlinear relationship exists between the surface roughness of the roller and the vibration acceleration of the car. Increased continuous loosening of the guide rail results in severe vibration of the car at the loose position of the support.

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