LIU Yang 1 , LUO Zhong 2 , ZHANG Hai-yang 1 , SHEN Li-juan 1 , ZHAO Feng-fei 1 , ZHANG Zong-kai 1.Prediction of Damage to Fan Blade from Bird Strike Based on Response Surface Method[J].航空发动机,2024,50(2):95-100
Prediction of Damage to Fan Blade from Bird Strike Based on Response Surface Method
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Key Words:bird strike  fan blade  damage  response surface method  aeroengine
Author NameAffiliation
LIU Yang 1 , LUO Zhong 2 , ZHANG Hai-yang 1 , SHEN Li-juan 1 , ZHAO Feng-fei 1 , ZHANG Zong-kai 1 1. AECC Shenyang Engine Research InstituteShenyang 110015 2. School of Mechanical Engineering & AutomationNortheastern UniversityShenyang 110819 
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Abstract:The cost of finite element simulation of bird strike fan blade damage is high. In order to solve engineering problems, the classic bird strike cascade slicing model is used to establish the mathematical model for the dynamic load of bird impact. Combined with the results of bird strike component tests, the fitting technology was used to clarify the functional relationship between the degree of fan blade damage and the calculated value of the maximum critical dynamic load, and the blade damage prediction response surface was formed. Rapid prediction of fan blade damage due to bird strike was realized, and the prediction workflow based on the response surface method was established. Combined with the requirements of the turbofan engine bird ingestion test, the fan structural features, and the results of the conducted bird strike component tests, the blade damage prediction response surface was established, the radial bending, and chordwise bending of two bird-strike schemes were preliminarily identified, and the tearing ranges do not exceed 0.3867 and 0.3941, respectively. The tearing and the chordwise bending are significantly correlated, showing a parabolic trend. The results show that the predicted damage is within the acceptable safety level. The prediction method can identify the damage range and trend. It can provide quantitative technical support for subsequent work such as bird strike finite element simulation, test planning, safety analysis, fan blade bird strike resistant design, etc.
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