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Novel Kriging-Based Decomposed-Coordinated Approach for Estimating the clearance Reliability of assembled Structures

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Computer Modeling in Engineering & Sciences 2021年第11期129卷 1029-1049页

作者： Da Teng Yunwen Feng Cheng Lu Chengwei Fei Jiaqi Liu Xiaofeng Xue School of Aeronautics Northwestern Polytechnical UniversityXi’an710072China Department of Aeronautics and Astronautics Fudan UniversityShanghai200433China

Turbine blisks are assembled using blades,disks and *** can endure complex loads at a high temperature,high pressure and high *** safe operation of assembled structures depends on the reliability of each *** Carlo(MC)simulation is commonly used to analyze structural reliability,but this method needs to run thousands of *** order to assess the clearance reliability of assembled structures in an efficient and precise manner,the novel Kriging-based decomposed-coordinated(DC)(DCNK)approach is proposed by integrating the DC strategy,the Kriging model and the importance sampling-based Markov chain(MCIS)*** this method,the DC strategy is used to decompose a multi-objective problem into many single-objective *** relationships between these many single-objectives and the overall objective are then *** Kriging model is applied to establish the limit state functions of the single-objectives and multi-objective problems,while the MCIS method is used to assess the structural assembled clearance ***,a highly nonlinear complex compound function is first utilized to verify the DCNK model from a mathematical ***,the reliability of an aeroengine high-pressure turbine(HPT)blade-tip radial running clearance(BTRRC)is analyzed to validate the DCNK approach by considering thermo-structural *** analytical results show that the reliability is 0.9976 when the allowance value of the BTTRC is 1.7650×10^(−3)*** with different methodologies(including direct simulation,the classical Kriging model,and the weighted response surface method(WRSM)),the proposed method holds obvious advantages in computing time and precision,as well as simulation efficiency and *** efforts of this paper provide a useful approach to analyzing assembled clearance reliability and contribute to the development of structural reliability theory.

关键词： Kriging-based decomposed-coordinated approach assembled clearance reliability assessment importance

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