Mechanical-thermal-electric Coupling Analysis And Design Optimization Of Piezoelectric Multilayered Plates

Piezoelectric smart structure has the ability to sense and actuate by using the piezoelectric effect.This kind of structure has many advantages such as fast reaction,self-diagnosing and self-recovery and so on.Now it has been one of the hotspots in the field of smart structures.For its many advantages,composite laminate has also been used widely in the engineering structures.Based on the piezoelectric constitutive equation,and the hypothesis of higher order displacement field,the high order electrical potential field,the higher order temperature field and Kirchhoff theory,Establishe the mechanical- thermal-electric high order finite element coupled model by using the Hamilton principle.We gave a brief introduction of ANSYS/APDL.Calculate the sticked/embedded piezo actuators and a single point,multi-point configuration of piezo actuators on the effects of deflection of cantilever beam and cantilever plates,and compare the advantages and disadvantages of two types of configuration methods,draw the change trend of the piezo actuators deflection with the variety of physical parameters.Based on above research results,then discuss the free vibration of two models and calculate the five frequencies and make the foundation for the active control.In the end, analyse optimal design and shape control of piezoelectric laminated plate by the zero-order optimization methods and the first-order optimization method of the ANSYS.The methods and conclusions provided in the paper have some reference value for the shape control of smart structures and the deformation of composite laminated plates under thermal,mechanical and electrical loads.