会议专题

NONLINEAR VIBRATION OF FUNCTIONALLY GRADED PIEZOELECTRIC ACTUACTORS

Piezoelectric actuators have been extensively used in a variety of engineering applications such as microelectromechanical systems, active vibration control, acoustic and pressure sensing. This paper investigates the nonlinear free vibration of a novel class of monomorph and bimorph actuators made of functionally graded piezoelectric materials (FGPM) with piezo-elastic constants varying smoothly along the layer thickness according to a power law distribution in terms of the volume fraction of the constituents. The actuator is modeled as a Timoshenko beam to account for the effects of transverse shear deformation, axial and rotary inertia. The partial differential equations of motion which include the effect of local and global geometric imperfections due to fabrication process are derived by employing Hamiltons principle and von Karman type of nonlinear kinematics. The differential quadrature method is used to obtain the nonlinear vibration frequencies for FGPM monomorph and bimorph actuators. Numerical results are presented in tabular form showing the influences of material composition, slenderness ratio and initial geometric imperfection on both the linear and nonlinear frequency parameters.

Functionally graded materials piezoelectric materials actuator nonlinear vibration initial imperfection Timoshenko beam theory differential quadrature method

J.Yang Y.J.Hu S.Kitipornchai T.Yan

School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University,PO Box 71, Bundoora, College of Mechanical Engineering, University of Shanghai for Science and Technology,Shanghai, 20009 Department of Civil and Architectural Engineering, City University of Hong Kong,Kowloon, Hong Kong,

国际会议

The IJSSD Symposium 2012 on Progress in Structural Stability and Dynamics(2012国际结构稳定与动力学进展会议)

南京

英文

46-52

2012-04-14(万方平台首次上网日期,不代表论文的发表时间)