含能材料2017，Vol.25Issue(1)：20-25,6.DOI:10.11943/j.issn.1006-9941.2017.01.003
运输过程火箭战斗部装药振动疲劳的数值分析
Numerical Analysis of the Vibration Fatigue of the Rocket Warhead Charge in the Transportation Process
摘要
Abstract
In order to understand the structural reliability of the solid rocket warhead in transport,the frequency domain method is used to evaluate the fatigue damage degree.The simplified kinetic model of the rocket launcher was built and the base excitation PSD (power spectrum density) of the charge was calculated by the transfer function and road load PSD;the finite element model of the charge was established and dynamic responses were solved by mode superposition methods;the fatigue damage degree was evaluated by Steinberg's 3-σ Law.Results show that the random vibration of the warhead charge causes the dynamic stress,and the inner face of the top hole is the danger place with the stress peak value of 4.86 MPa.When the loading time reaches 250 h the damage degree is 1.12,which reveals that the warhead charge has been broken.The road roughness load can bring about the fatigue damage of the warhead charge,which has negative impacts on the structural reliability.关键词
战斗部装药/路面激励/随机振动/疲劳损伤Key words
rocket warhead charge/road roughness loads/random vibration/fatigue damage分类
军事科技引用本文复制引用
张巍耀,涂小珍,蓝林刚,董天宝..运输过程火箭战斗部装药振动疲劳的数值分析[J].含能材料,2017,25(1):20-25,6.基金项目
中国工程物理研究院化工材料研究所科技创新基金(KJCX-201509) （KJCX-201509）
