| 起落架结构疲劳寿命预测技术研究 |
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| 引用本文： | 马建,薛彩军,邓亚权,王宏. 起落架结构疲劳寿命预测技术研究[J]. 机械科学与技术, 2010, 0(1) |
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| 作者姓名： | 马建 薛彩军 邓亚权 王宏 |
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| 作者单位： | 南京航空航天大学飞行器先进设计技术国防重点学科实验室; |
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| 基金项目： | 航空科学基金项目(2009ZA52001);;高等学校博士学科点专项科研基金项目(20070287033);;江苏省高科技支撑计划——工业部分项目(BE2008137)资助 |
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| 摘 要： | 以某型机前起落架为例,建立起落架有限单元模型,施加多点约束模拟起落架实际情况,然后应用全寿命分析方法,针对疲劳缺口系数、存活率和载荷加载系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进行分析讨论,得出了疲劳寿命随不同参数的变化趋势,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,对起落架的寿命试验和设计有一定参考作用。
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| 关 键 词： | 起落架 有限元分析 疲劳寿命 疲劳缺口系数 存活率 |
On Fatigue Life Prediction of a Landing Gear |
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| Ma Jian,Xue Caijun,Deng Yaquan,Wang Hong. On Fatigue Life Prediction of a Landing Gear[J]. Mechanical Science and Technology for Aerospace Engineering, 2010, 0(1) |
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| Authors: | Ma Jian Xue Caijun Deng Yaquan Wang Hong |
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| Affiliation: | Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle/a>;Nanjing University of Aeronautics and Astronautics/a>;Nanjing 210016 |
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| Abstract: | In this paper,taking the nose landing gear of an aircraft as an example,the finite element model of it is established,and the multipoint restriction is applied to simulating the actual situation of the landing gear.Different parameters such as fatigue notch factor,certainty of survival,and magnitude have great impact on the fatigue life assessment of the landing gear,and the relationship function between the parameters and the fatigue life are obtained by using the full service life analysis method,and the ... |
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| Keywords: | landing gear finite element analysis fatigue life fatigue notch factor certainty of survival |
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