考虑包容性约束的加筋机匣轻量化设计

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Abstract The aero-engine casing should satisfy the containment requirements to resist the impact of high-energy fragments in order to ensure the safety of aircraft flight. The finite element analysis of casing containment was carried out by LS-DYNA to design the lightweight configuration of high pressure compressor casing, then the containment mechanism which dominated by absorbing blade kinetic energy through bulging plastic deformation of both smooth wall casing and stiffened casing can be obtained. Furthermore, it is necessary to propose an optimal design framework of stiffened casing to fully explore the structural performance. A containment mechanism based on the damage depth of casing thickness was proposed. Then, an optimization process combining parametric modeling, numerical simulation and containment evaluation was established. The software Deskopt which independently developed was used for optimization iteration and the optimal configuration was output. The results show that compared with the smooth wall casing, the optimal stiffened casing can reduce the weight by 20.86% on the premise of ensuring containment.

Key words： casing containment stiffened structure structural optimization numerical simulation

Received: 25 May 2022 Published: 28 June 2023

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	Articles by authors
	SUN Yanjie1
	MA Ning2
	YU Xueran1
	SONG Zhibo2
	ZHOU Caihua2
	XU Shengli3
	WANG Bo2

Cite this article:

SUN Yanjie1,MA Ning2,YU Xueran1, et al. Lightweight design of stiffened casing considering containment constraints[J]. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(12): 274-282.

URL:

http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2023/V42/I12/274

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