航空发动机鸟撞适航符合性数值模拟研究

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Abstract Airworthiness certification of aircraft turbine engines with respect to bird ingestion is reliant on physical tests of a full scale engine. Due to the complexity of the engine structure, there are problems, such as computational efficiency and difficulty in determining critical ingestion parameters, in numerical simulation of the whole engine during bird strikes. which is not adopted by engineering wor…ks. In compliance with bird ingestion requirements, numerical analysis of an aeroengine subjected to bird strikes is an economical and efficient method. Based on the numerical simulation requirements of aircraft engine due to bird strikes, simplified modeling of aircraft engine and critical ingestion parameters were investigated. Firstly, considering relationships and interactions among engine components under operating conditions, the finite element model of a full-scale aeroengine was developed using the SPH method. Secondly, based on simulations of fan blades during a bird-strike event, critical ingestion parameters of a large single bird and medium flocking birds were determined. Finally, with regard to the full-scale FE model of a turbine engine subjected to bird strikes under the most critical condition, impact force, rotating unbalance, unbalancing load and blade damage induced by large single bird, medium flocking birds, medium single bird and large flocking bird, respectively, were captured. The numerical results show that the bird-strike damage generated by the large single bird poses the greatest threat to the safety of engine components, while blade damage induced by flocking birds covered a wider area. It is invaluable for engine manufacturers to incorporate a predictive modeling methodology of a turbine engine under bird strikes into structural safety design and bird ingestion certification.

Key words： aircraft engines airworthiness compliance bird strikes medium flocking birds fan blades

Received: 07 August 2023 Published: 28 May 2024

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	Articles by authors
	LI Junjie1
	CHAI Xianghai2
	JIN Xianlong1
	YANG Peizhong1

Cite this article:

LI Junjie1,CHAI Xianghai2,JIN Xianlong1, et al. Numerical simulation on the airworthiness compliance of aircraft engines during bird strikes[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(10): 311-318.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I10/311

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