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Vol. 153, No. 6, June 2013, pp. 219-225

 

Bullet

 

The Rotating Rectangular Thin Plate's Dynamic Stress Experiment (Single Point's Frequency Research)
 
Xixin JIANG

School of Mechanical/Elect Eng, Wuhan University of Technology, HuBei, Wuhan 430070, China

Tel.: 13627141895

E-mail: Jiangxi2006@gmail.com

 

Received: 19 April 2013   /Accepted: 14 June 2013   /Published: 25 June 2013

Digital Sensors and Sensor Sysstems

 

Abstract: Utilizing optical Fiber Bragg Grating's (FBG) characteristic of transmission optic signals in non-contact way, the measure method of the twisted, variable cross-section, variable thickness, rotating rectangular blade's local strain has been presented. Firstly, by using the finite element method to obtain the rotating blade's natural frequency, modal shape and strain modal shape, the mounting location of the FBG on the rotating blade is determined; secondly, using optical fiber non-contact transmission device, the rotating blade's dynamic strain in different locations can be measured by FBG. In this paper, the author only analyzed the frequency, amplitude and the dynamic stiffening phenomenon of dynamic strain at one point in rotating state. Finally, the author points out that this method can effectively measure rotating blade's dynamic strain and dynamic response, by result analysis, rotatating blade worth further researching.

 

Keywords: Rotating blade, FBG, Dynamic strain, Non-contact, Strain.

 

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