Investigating the effect of parameters affecting the optimal placement of piezoelectric actuators on reducing stress concentration using PSO algorithm

This article examines the factors affecting the optimal model of piezoelectric actuators’ placement around a hole in a plate under tension in order to reduce stress concentration. It has been provided a stiffness ratio in which the parameters affecting piezoelectric actuators’ placement around a hole are shown. this stiffness ratio is introduced with four parameters include modulus of elasticity, thickness of the plate, thickness of the piezoelectric actuators and voltage applied to piezoelectric actuators as the parameters affecting actuators placement around the hole. In this study PSO algorithm was used to examine the optimum placement of piezoelectric actuators. Next, using particle swarm optimization algorithm, a python code is developed to specify the best pattern for actuation around the hole for effect of different parameters. Using particle swarm optimization algorithm, the area and the best location of piezoelectric patches are investigated and the optimum pattern recognition around the hole is presented. Then, the effect of increasing the area of piezoelectric patches on stress concentration reduction is investigated for all percentage area of piezoelectric patches. To analyze the results, the solution of finite element on an experiment was used.