| 摘要: |
| 针对导弹接头吊耳在常规载荷和振动环境共同作用下产生的疲劳问题，提出了一种结构疲劳寿命预测方法。首先，基于两种载荷作用下金属材料的疲劳失效特征共性，建立了对应载荷下两种疲劳损伤的累加规则；其次，采用Miner理论和Dirlik模型分别计算两种载荷下结构的疲劳损伤值；最后，通过对两种疲劳损伤的综合计算，建立了结构疲劳寿命的预测方法。使用该方法对导弹接头吊耳在两种载荷共同作用下的疲劳寿命进行了分析计算。 |
| 关键词: 常规载荷 振动环境 吊耳 疲劳破坏 寿命预测 |
| DOI： |
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| 基金项目:国家自然科学基金（52002181）；江苏高校优势学科建设工程资助项目 |
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| Fatigue Life Calculation of Missile Lug Under Conventional Load and Vibration Environment |
| SHI Xin,WU Fuqiang,LUO Qiwen,HUANG Jie |
| (National Defense Key Discipline Laboratory of Advanced Aircraft Design Technology, Nanjing University of Aeronautics and Astronautics) |
| Abstract: |
| Aiming at the fatigue problem of missile lug under combined action of conventional load and vibration environment, a method of structural fatigue life prediction is proposed. First, the accumulation rules of two kinds of fatigue damage under corresponding loads was established based on the common characteristics of metal fatigue failure. Then, Miner theory and Dirlik model are used to calculate the fatigue damage values of the structure under two kinds of loads. Finally, the prediction method of structural fatigue life is established through the comprehensive calculation of the two kinds of fatigue damage. In this paper, the fatigue life of a missile lug under two kinds of loads has been analyzed by using this method. |
| Key words: Conventional load Vibration environment Lifting lug Fatigue failure Life prediction |