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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 11    November 2018

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Dynamic probabilistic design technique for multi-component system with multi-failure modes
ZHANG Chun-yi(张春宜)1, LU Cheng(路成)1, 2, FEI Cheng-wei(费成巍)3, JING Hui-zhe(井慧哲)1, LI Cheng-wei(李成伟)1

1. School of Mechanical and Power Engineering, Harbin University of Science and Technology,Harbin 150080, China;
2. School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China;
3. Department of Aeronautics and Astronautics, Fudan University, Shanghai 200433, China

Abstract:For unacceptable computational efficiency and accuracy on the probabilistic analysis of multi-component system with multi-failure modes, this paper proposed multi-extremum response surface method (MERSM). MERSM model was established based on quadratic polynomial function by taking extremum response surface model as the sub-model of multi-response surface method. The dynamic probabilistic analysis of an aeroengine turbine blisk with two components, and their reliability of deformation and stress failures was obtained, based on thermal-structural coupling technique, by considering the nonlinearity of material parameters and the transients of gas flow, gas temperature and rotational speed. The results show that the comprehensive reliability of structure is 0.9904 when the allowable deformations and stresses of blade and disk are 4.78×10–3 m and 1.41×109 Pa, and 1.64×10–3 m and 1.04×109 Pa, respectively. Besides, gas temperature and rotating speed severely influence the comprehensive reliability of system. Through the comparison of methods, it is shown that the MERSM holds higher computational precision and speed in the probabilistic analysis of turbine blisk, and MERSM computational precision satisfies the requirement of engineering design. The efforts of this study address the difficulties on transients and multiple models coupling for the dynamic probabilistic analysis of multi-component system with multi-failure modes.

 

Key words: probabilistic analysis; multi-extremum response surface method; multi-component; multi-failure modes

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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