|Table of Contents|

Reliability analysis of fatigue life for rocket engine turbine blade(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2020年02期
Page:
57-63
Research Field:
研究与设计
Publishing date:

Info

Title:
Reliability analysis of fatigue life for rocket engine turbine blade
Author(s):
JIANG Jinpeng1;  LIU Zhichao1;  LIU Zhu1;  GONG Fan1;  WANG Jue2
(1.Science and Technology on Space Physics Laboratory, Beijing 100076, China; 2.Systems Engineering Division, China Academy of Launch Vehicle Technology, Beijing 100076, China)
Keywords:
rocket engine;  turbine blade;  fatigue life;  reliability;  sensitivity
PACS:
V434.212
DOI:
-
Abstract:
Due to the randomness of material properties, structural dimensions and working loads during the process of production and use, fatigue life usually has great dispersion.Based on Monte Carlo simulation combined with response surface method(RSM), probabilistic fatigue life and reliability analysis were conducted for some rocket engine turbine blades, considering the randomness of structural geometric parameter, material property and working load.The sensitivity of blade life to those random factors and the influence of variable dispersion on fatigue life were analyzed.The results show that the fatigue life has a skewed distribution.Turbine inlet temperature has the greatest impact on blade fatigue life, followed by low-cycle fatigue(LCF)properties.The rotating speed and thermal expansion coefficient have some effect on blade life.Controlling the variable dispersion is approved to be an effective way to increase the safe life of turbine blade.For a single variable, the effect of controlling the temperature dispersion of turbine inlet is most significant.

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Last Update: 2020-04-25