起落架结构疲劳寿命预测技术研究
首发时间:2009-02-12
摘要:本文以某型飞机前起落架为例,通过起落架有限元模型,应用全寿命分析方法,针对建模时所需参数的变化导致起落架疲劳寿命评估预测时产生不同的结果,做出分析讨论,得出疲劳寿命随不同参数变化的趋势;根据实际情况选择最符合实际的一组参数,预测评估前起落架的疲劳寿命,其对起落架的设计和疲劳寿命实验具有很好的指导意义。
关键词: 起落架 有限元分析 疲劳寿命 疲劳缺口系数 存活率
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Research on Fatigue Life Prediction Technique for a Landing Gear
Abstract:In this paper, taking the nose landing gear of an aircraft as an example, the finite element model of it is established. Different parameters have great impact on the fatigue life assessment of the landing gear, and the relationship function between the parameters and the fatigue life are gained by the farther analysis. The fatigue life of the nose landing gear is assessed using the whole life analysis method with the most suitable parameters, and it is useful for the design of landing gear and the fatigue life experiment.
Keywords: landing gear finite element analysis fatigue life fatigue notch factor certainty of survival
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