Smart Structures and Systems

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Second-order statistics of natural frequencies of smart laminated composite plates with random material properties

  • Singh, B.N. (Department of Aerospace Engineering, Indian Institute of Technology) ;
  • Umrao, Atul (Department of Applied Mechanics, MN National Inst. of Technology) ;
  • Shukla, K.K. (Department of Applied Mechanics, MN National Inst. of Technology) ;
  • Vyas, N. (Department of Aerospace Engineering)
  • Received : 2005.09.02
  • Accepted : 2007.03.26
  • Published : 2008.01.25
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Abstract

Nowadays developments in the field of laminated composite structures with piezoelectric have attracted significant attention of researchers due to their wide range of applications in engineering such as sensors, actuators, vibration suppression, shape control, noise attenuation and precision positioning. Due to large number of parameters associated with its manufacturing and fabrication, composite structures with piezoelectric display a considerable amount of uncertainty in their material properties. The present work investigates the effect of the uncertainty on the free vibration response of piezoelectric laminated composite plate. The lamina material properties have been modeled as independent random variables for accurate prediction of the system behavior. System equations have been derived using higher order shear deformation theory. A finite element method in conjunction with Monte Carlo simulation is employed to obtain the secondorder statistics of the natural frequencies. Typical results are presented for all edges simply supported piezoelectric laminated composite plates to show the influence of scattering in material properties on the second order statistics of the natural frequencies. The results have been compared with those available in literature.

Keywords

References

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