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Dynamic Analysis of a Plate on the Generalized Foundation with Fractional Damping Subjected to Random Excitation

Author

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  • Ali Hosseinkhani
  • Davood Younesian
  • Saman Farhangdoust

Abstract

Stochastic response of a plate on the generalized foundation driven by random excitation is solved in this paper. Governing differential equation is obtained by employing the Galerkin method. The generalized harmonic function technique is applied to the governing equation of motion. Using the stochastic averaging method (SAM), the system is approximated by the time homogeneous diffusive Markov process. Corresponding approximate stationary probability function is achieved by solving associated Fokker-Plank-Kolmogorov (FPK). An analytical solution is presented for the stationary probability of the amplitude and velocity. Validity of the stationary probability is verified by Monte-Carlo simulation. Parametric study is carried out to investigate effects of foundation parameters and excitation intensity on the stationary probability function. It is found that the fractional properties act similar to the foundation stiffness and damping and can be employed as a new control parameter for the support design.

Suggested Citation

  • Ali Hosseinkhani & Davood Younesian & Saman Farhangdoust, 2018. "Dynamic Analysis of a Plate on the Generalized Foundation with Fractional Damping Subjected to Random Excitation," Mathematical Problems in Engineering, Hindawi, vol. 2018, pages 1-10, July.
    • Handle: RePEc:hin:jnlmpe:3908371
    DOI: 10.1155/2018/3908371
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