Smart Structures and Systems

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A novel method to specify pattern recognition of actuators for stress reduction based on Particle swarm optimization method

  • Fesharaki, Javad Jafari (Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University) ;
  • Golabi, Sa'id (Department of Mechanical Engineering, Faculty of Engineering, University of Kashan)
  • Received : 2015.06.19
  • Accepted : 2016.02.02
  • Published : 2016.05.25
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Abstract

This paper is focused on stiffness ratio effect and a new method to specify the best pattern of piezoelectric patches placement around a hole in a plate under tension to reduce the stress concentration factor. To investigate the stiffness ratio effect, some different values greater and less than unity are considered. Then a python code is developed by using particle swarm optimization algorithm to specify the best locations of piezoelectric actuators around the hole for each stiffness ratio. The results show that, there is a line called "reference line" for each plate with a hole under tension, which can guide the location of actuator patches in plate to have the maximum stress concentration reduction. The reference line also specifies that actuators should be located horizontally or vertically. This reference line is located at an angle of about 65 degrees from the stress line in plate. Finally two experimental tests for two different locations of the patches with various voltages are carried out for validation of the results.

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References

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