摘要
针对发射装置尾罩在随机振动试验中可能存在的疲劳破坏问题,采用有限元法对其随机振动疲劳寿命进行了预计。分析了频率响应,得到结构的应力传递函数。结合5A06铝合金的S-N曲线和加速度PSD激励,采用Dirlik法计算了尾罩随机振动疲劳寿命,结果满足随机振动试验的考核要求。
For the problem of fatigue failure on launcher trail cover in random vibration test,the random vibration fatigue life is estimated by finite element method. The stress transfer function is obtained by frequency response simulation. Combined with S-N curve of 5A06 aluminium alloy and acceleration power spectral density loads,random vibration fatigue life of trail cover is analyzed by Dirlik method. The results meet the requirements of random vibration test.
出处
《航空兵器》
2016年第4期78-80,共3页
Aero Weaponry
关键词
疲劳寿命
随机振动
尾罩
发射装置
有限元分析
fatigue life
random vibration
trail cover
launcher
finite element analysis
