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为了对火箭发射装置炮架工作特性进一步研究,以火箭发射装置炮架作为研究对象,通过使用有限元方法,Miner线性损伤累积理论并结合炮架受载荷情况,使分析条件更接近于实际工况,获得了火箭发射装置在实际工况下应力、变形、安全系数和疲劳寿命分布规律。分析结果表明:基于Q235碳素结构钢疲劳寿命S-N曲线,该火箭发射装置炮架低安全系数区和低寿命区均发生在炮架应力较为集中区域,与工程实际相符合,有利于指导炮架工程设计;以有限元计算模型为基础,并结合Miner线性损伤理论方法,可以获得复杂结构件强度、刚度和疲劳寿命等特性。
In order to further research on the working characteristics of the rocket launcher, the rocket launcher was used as the research object. By using the finite element method and the cumulative damage theory of the Miner and combining with the loading of the launcher, the analysis conditions are closer to the actual working conditions , Obtained the rocket launcher in the actual conditions of stress, deformation, safety factor and fatigue life distribution. The analysis results show that, based on the SN curve of fatigue life of Q235 carbon structural steel, the low safety factor zone and the low life zone of the gun launching device are all located in the relatively concentrated area of the gun crater, which is consistent with the engineering practice, Engineering design; Based on the finite element calculation model and the Miner theory of linear damage, the strength, stiffness and fatigue life of complex structures can be obtained.