Reliability-Based Design Optimization Method of Turbine Disk with Transformed Deterministic Constraints

Dian Yin Hu, Jun Jie Yang, Cheng Wei Fei, Rong Qiao Wang, Yat Sze Choy

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

To improve the computational efficiency of the reliability-based design optimization (RBDO) of a complex structure with nonlinear and implicit limit-state function, the single-loop-single-vector (SLSV)-limit-state factor (LSF) (SLSV-LSF) method was developed by fully considering the advantages of the SLSV approach and the LSF method to transform uncertain constraints into deterministic constraints. The mathematical models of SLSV and LSF were established and the basic RBDO process of the SLSV-LSF method is presented. The shape optimization of an aeroengine turbine disk was completed based on the proposed method. From the reliability sensitivity analysis of the turbine disk, it is revealed that an uncertain constraint of average circumferential stress can be transformed into a deterministic constraint and material density can be regarded as a deterministic variable. Through the min-mass shape design of the turbine disk based on different approaches, it is demonstrated that the developed method maintains high computational speed and efficiency while keeping maintaining computational accuracy, which validates the feasibility and validity of the SLSV-LSF method in the RBDO of aeroengine typical components.
Original languageEnglish
Article number04016070
JournalJournal of Aerospace Engineering
Volume30
Issue number1
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Limit-state factor
  • Mean value-based single-loop-single-vector
  • Reliability analysis
  • Reliability-based design optimization
  • Turbine disk

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanical Engineering

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