Volume 39 Issue 8
Aug.  2013
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Xu Menghui, Qiu Zhiping. Interval analysis and optimization for free vibration of all-composite lattice truss core sandwich beam[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(8): 1079-1085. (in Chinese)
Citation: Xu Menghui, Qiu Zhiping. Interval analysis and optimization for free vibration of all-composite lattice truss core sandwich beam[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(8): 1079-1085. (in Chinese)

Interval analysis and optimization for free vibration of all-composite lattice truss core sandwich beam

  • Received Date: 30 Aug 2012
  • Rev Recd Date: 25 Jan 2013
  • Publish Date: 30 Aug 2013
  • Considering the uncertainties in composite materials, free vibration of all-composite lattice truss core sandwich beam was studied. By expressing the uncertain parameters in the form of interval vector, a high-accurate collocation interval analysis method, which requires the intervals rather than probability distribution functions of uncertainties, was proposed to calculate the natural frequency of all-composite lattice truss core sandwich beam with uncertain-but-bounded parameters and based on which interval optimization was accomplished. A feasible way for the design of novel composite materials with serious nonlinear phenomena was provided. Compared with the probabilistic analysis method, the results demonstrate the feasibility of interval analysis method and interval optimization method is of more engineering significance than deterministic optimization technique in the design of composite structures by fully considering the potential negative impact from uncertainties.

     

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