DESIGN OF ELECTRODES IN TWO-LAYERED PIEZOELECTRIC COMPOSITE DISK FOR CONTROL OF THERMAL STRESSES
(0) This paper deals with a direct control problem of thermal stresses in a two-layered composite disk consisting of a transversely isotopic structural layer onto which a piezoelectric layer of crystal 6mm is perfectly bonded. Some electrodes are arranged concentrically on the top surface of the piezoelectric layer. When a stationary heating temperature distribution acts on the bottom surface of the composite disk, the stationary maximum thermal stress in the structural layer can be controlled with the optimal design of electrodes on the piezoelectric layer. In the previous reports, the maximum thermal stress in the structural layer has been minimized with the application of appropriate voltages to the electrodes; the stepwise voltage applied to each electrode has been obtained by solving an optimization problem. Since the target function for the design problem is multi-peaked, the particle swarm optimization (PSO) based approach is employed for optimization. In this study, an alternative optimization algorithm is developed in order to reduce the computational cost of the optimization. A numerical example for a composite disk consisting of a CFRP layer and a cadmium selenide layer is solved with the proposed method. The numerical results with respect to a suppression ratio of the thermal stress are obtained and shown in tables.
direct control thermal stress composite disk piezoelectric actuation optimization.
Masanori Tomozawa Sei-ichiro Sakata Fumihiro Ashida
Graduate School of Shimane University, Japan Department of Electronic and Control Systems Engineering, Shimane University, Japan
国际会议
南京
英文
267-270
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）