Structural Engineering and Mechanics

  • 제68권5호
  • /
  • Pages.549-561
  • /
  • 2018
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  • 1225-4568(pISSN)
  • /
  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Global sensitivity analysis improvement of rotor-bearing system based on the Genetic Based Latine Hypercube Sampling (GBLHS) method

  • Fatehi, Mohammad Reza (Mechanical Engineering Department, Shahid Chamran University of Ahvaz) ;
  • Ghanbarzadeh, Afshin (Mechanical Engineering Department, Shahid Chamran University of Ahvaz) ;
  • Moradi, Shapour (Mechanical Engineering Department, Shahid Chamran University of Ahvaz) ;
  • Hajnayeb, Ali (Mechanical Engineering Department, Shahid Chamran University of Ahvaz)
  • 투고 : 2017.09.17
  • 심사 : 2018.10.23
  • 발행 : 2018.12.10
⟨ 이전 논문 다음 논문 ⟩

초록

Sobol method is applied as a powerful variance decomposition technique in the field of global sensitivity analysis (GSA). The paper is devoted to increase convergence speed of the extracted Sobol indices using a new proposed sampling technique called genetic based Latine hypercube sampling (GBLHS). This technique is indeed an improved version of restricted Latine hypercube sampling (LHS) and the optimization algorithm is inspired from genetic algorithm in a new approach. The new approach is based on the optimization of minimax value of LHS arrays using manipulation of array indices as chromosomes in genetic algorithm. The improved Sobol method is implemented to perform factor prioritization and fixing of an uncertain comprehensive high speed rotor-bearing system. The finite element method is employed for rotor-bearing modeling by considering Eshleman-Eubanks assumption and interaction of axial force on the rotor whirling behavior. The performance of the GBLHS technique are compared with the Monte Carlo Simulation (MCS), LHS and Optimized LHS (Minimax. criteria). Comparison of the GBLHS with other techniques demonstrates its capability for increasing convergence speed of the sensitivity indices and improving computational time of the GSA.

키워드

참고문헌

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