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Estimation method for random sonic fatigue life of thin-walled structure of a combustor liner based on stress probability distribution |
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| Authors: | SHA Yun-dong GUO Xiao-peng LIAO Lian-fang and XIE Li-juan |
| Institution: | SHA Yun-dong1,GUO Xiao-peng2,LIAO Lian-fang2,XIE Li-juan2(1.Liaoning Key Laboratory of Digital Technology Simulation and Test Technique,College of Power and Energy Engineering,Shenyang Aerospace University,Shenyang 110136,China,2.Shenyang Aeroengine Research Institute,Aviation Industry Corporation of China,Shenyang 110015,China) |
| Abstract: | As to the sonic fatigue problem of an aero-engine combustor liner structure under the random acoustic loadings,an effective method for predicting the fatigue life of a structure under random loadings was studied.Firstly,the probability distribution of Von Mises stress of thin-walled structure under random loadings was studied,analysis suggested that probability density function of Von Mises stress process accord approximately with two-parameter Weibull distribution.The formula for calculating Weibull parame... |
| Keywords: | thin-walled structure sonic fatigue life estimation probability density function(PDF) power spectrum density(PSD) |
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