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Method for vibrating power-generation analysis finite element by different shapes of cantilever beam piezoelectric vibrators

A technology of piezoelectric vibrator and vibration power generation, applied in piezoelectric/electrostrictive/magnetostrictive devices, electrical components, chemical instruments and methods, etc., can solve the problems of lack of simulation analysis methods

Inactive Publication Date: 2010-01-06
NAT UNIV OF DEFENSE TECH
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  • Application Information

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Problems solved by technology

At present, the research on the power generation behavior of piezoelectric vibrators with other shapes has been theoretically studied, but there is still a lack of corresponding simulation analysis methods for verification

Method used

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  • Method for vibrating power-generation analysis finite element by different shapes of cantilever beam piezoelectric vibrators
  • Method for vibrating power-generation analysis finite element by different shapes of cantilever beam piezoelectric vibrators
  • Method for vibrating power-generation analysis finite element by different shapes of cantilever beam piezoelectric vibrators

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Embodiment Construction

[0021] The flow process of the inventive method sees figure 1 , the cantilever piezoelectric vibrator used for vibration power generation is composed of two piezoelectric ceramic sheets, a metal substrate and electrodes. The piezoelectric ceramic sheet is made of PZT-5H, and the metal substrate material is nickel alloy. Since the piezoelectric ceramic sheet is hard and brittle, it is pasted on the metal substrate. In order to generate more electricity, two piezoelectric ceramic sheets are connected in parallel according to the same polarization direction.

[0022] The present invention will be described step by step in detail for rectangular, trapezoidal and triangular cantilever beam piezoelectric vibrators below with reference to the accompanying drawings.

[0023] Step 1: Approximate simplification, using Soliworks software to establish geometric models of rectangular, trapezoidal and triangular cantilever beam piezoelectric vibrators with the same length, thickness and ro...

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Abstract

The invention discloses a method for vibrating a power-generation analysis finite element by different shapes of cantilever beam piezoelectric vibrators. The method comprises the following steps: utilizing soliworks software to respectively establish geometric models of rectangular, trapezoidal and triangular cantilever beam piezoelectric vibrators of which the length, the thickness and the root width are all equal through approximate simplification; respectively leading the geometric models into ansys software and implementing the following operational steps: S1: setting and distributing material properties and cell types of all parts of piezoelectric vibrators; S2: setting meshing properties and carrying out the meshing by adopting a mapping mode; S3: setting boundary conditions and voltage coupling restrains and establishing a finite element model of the cantilever beam piezoelectric vibrators; S4: utilizing the ansys software to apply a fixed load to the cantilever piezoelectric vibrators, carrying out static analysis and recording simulation results; and finally, comparing and analyzing the simulation results of three shapes of piezoelectric vibrators.

Description

technical field [0001] The invention relates to the technical field of finite element modeling of piezoelectric materials, and in particular provides a finite element method for analyzing vibration and power generation of piezoelectric vibrators with different shapes. Background technique [0002] In recent years, piezoelectric vibration power generation technology, which uses piezoelectric materials to convert vibration energy in equipment or the surrounding environment into electrical energy, has become a frontier research topic in the field of condition monitoring. It is of great significance and Value. Since the cantilever beam structure can produce larger deformation and lower resonance frequency under the same conditions, the cantilever beam piezoelectric vibrator structure is widely used in the field of piezoelectric vibration power generation. [0003] At present, rectangular cantilever beam piezoelectric vibrators are widely used to realize the conversion of vibrat...

Claims

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Application Information

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IPC IPC(8): G06F17/50B81C5/00
CPCY02E60/76Y04S40/22Y02E60/00
Inventor 杨拥民陈仲生邓冠前陶利民
Owner NAT UNIV OF DEFENSE TECH
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