Analysis of turbine pump blade failure and reliability induced by manufacturing factors
[Objective]In this paper,we analyze the turbine blade failures and the reliability of liquid rocket engine turbopump rotor systems.These failures and related reliability issues may be induced by manufacturing and processing factors.[Methods]Characteristics of possible machining defects are summarized and extracted for turbine blade part of liquid rocket engine turbo pump rotor system.Representative defect factors are selected to develop a defect—mechanical model,and simulation results are obtained by the finite element analysis software.The fuzzy cluster analysis is used to formulate the evaluation index,through which the blade life is predicted and the reliability induced by machining defects is computed.[Results]Based on our simulation results,we believe that faults and reliability issues in turbine blades are most probably caused by manufacturing and processing factors.[Conclusions]This study indicates that it is conducive to investigate faults and the reliability of turbine blades induced by manufacturing and processing factors.In addition,the research method proposed in this paper can offer a theoretical guide for reliability predictions and fault analyses of engine turbine blades.
manufacturing defectturbine bladefinite element analysisfuzzy judgementreliability analysis
万方数据
维普
