Theoretical Analysis and FEM Simulation of Piezoelectric Vibrator Used in Ultrasonic EDM System

2013 ◽  
Vol 694-697 ◽  
pp. 3020-3024
Author(s):  
Hong Bing Wang ◽  
Zhi Rong Li ◽  
Chun Hua Sun
Keyword(s):  
Theoretical Analysis ◽  
Natural Frequencies ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Fem Simulation ◽  
Model Analysis ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Piezoelectric Vibrator ◽  
Working Frequency

The dynamic performance of the piezoelectric vibrator used in ultrasonic EDM machine in natural frequencies has a great effect on machining precision. Firstly, Through theoretical analysis the dynamic characteristics of the piezoelectric vibrator is obtained. Then the three-dimensional model of the piezoelectric vibrator is constructed by using PRO/E software, and model analysis is carried by using FEM software. Through theoretical analysis and FEM simulation, the appropriate working frequency and mode of the piezoelectric vibrator was found, and the piezoelectric vibrator was fabricated. Experimented results show that the model analysis of frequency is accord with that of FEM.

Modal Analysis of Ring-Plate of Double Crank Four Ring-Plate-Type Cycloid Reducer

2010 ◽  
Vol 139-141 ◽  
pp. 2364-2367
Author(s):  
Bing Yang ◽  
Wen Liu ◽  
Yan Liu
Keyword(s):  
Natural Frequencies ◽  
Three Dimensional ◽  
Vibration Test ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Distribution Rules ◽  
Ring Plate ◽  
Analysis System ◽  
Vibration Tests ◽  
Plate Type

The vibration tests of the double crank ring-plate-type cycloid reducer driven by three gears are tested and analyzed with the HEAD acoustics multi-channel vibration test and analysis system. The tests of the reducer are completed under the condition of different rotational speeds and different loads. The vibration distribution rules of the reducer are obtained. The three dimensional model of the ring-plates of the double crank four ring-plate-type cycloid reducer with Pro/E are established, the modality analysis are carried out on the model by the use of ANSYS. The natural frequencies and the corresponding vibration models of the ring-plates are gained. The results are well consistent with that of the vibration tests which provide the basis for further study of vibration and noise reduction.

The Dynamic Performance Research of Fixture for Automobile Hydraulic Vibration Reliability Test

2010 ◽  
Vol 37-38 ◽  
pp. 1452-1456
Author(s):  
Yi Shan Zeng
Keyword(s):  
Hydraulic System ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Great Influence ◽  
Reliability Test ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Vibration Reliability ◽  
Vibration Modal ◽  
Performance Research

In order to test the reliability of automobile hydraulic, the vibration reliability test needs to be done. The fixture, which is used to clamp and fix the hydraulic system, is one of the most important components of the test. So the dynamic performance of the fixture has great influence on the vibration test. According to the figure and setting localization of electronics, the three-dimensional model of fixture was constituted. The modal frequency and vibration modal were calculated using FEM. By the result of analysis, the structure of the fixture was mended to meet the test requirement.

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