基于DFR的战斗机疲劳关键部位日历寿命设计方法

doi:10.7527/S1000-6893.2022.27614

Abstract

Abstract: The core of the problem of calendar life in fatigue critical parts of fighter is the lack of universal calendar life design method. To solve this problem, firstly based on the characteristics of fighter flight load, the influence of the envi-ronment of ground parking, low altitude flight and high altitude flight on the structural fatigue performance of fighter is discussed. Secondly, the calendar life analysis model of fighter structure is established based on DFR method for durability design of fighter structures under corrosive conditions and the fatigue damage accumulation theory, and the influencing factors of calendar life are analyzed from the perspective of service environment, aircraft type, material and structure. Thirdly, the calendar life design method of fatigue critical parts of fighter is established based on this model, which preliminarily solves the problem of calendar life design of fatigue critical parts of fighter in the whole life cycle. Finally, the feasibility, universality and superiority of this method are illustrated by comparing with the traditional calendar life evaluation technology and an example of the calendar life design of the outer wing 2rd wall of a certain fighter.

Key words: Fighter, Calendar life, Fatigue critical parts, Detail fatigue rating, Fatigue damage

CLC Number:

V215.2

References

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Calendar life design method for fatigue critical parts of fighter based on DFR method

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