摘要
服役数据表明,民用飞机辅助动力装置在运行中发生破坏时可能产生非包容的高能转子碎片。本文总结了机体结构受非包容转子碎片损伤的评估方法。根据FAA咨询通告中的"小碎片"模型,绘制非包容转子影响区域包络图;对于处于受影响区域中的结构件,通过作图法确定结构件的平动风险角,从而确定结构受影响的严重情况;对应严重情况,建立机体剩余结构有限元模型,施加剩余载荷,计算剩余结构内力解,对剩余结构进行强度分析。
Service experiences statistics have shown that high-energy fragments can be generated from uncontained auxiliary power unit （APU） rotor failures. Evaluation method for airframe structures which can be destroyed by uncontained rotor fragments was summarized. Uncontained fragments influence envelope was made based on the ＇small fragments＇ model described in FAA advisory circular. For every structure element in the envelope, translational risk angles were calculated by mapping to define serious cases. To apply residual loads onto remaining structure FEMs which were built for serious cases to calculate forces and moments on the remaining structures and to carry out stress analysis.
出处
《航空科学技术》
2015年第9期19-22,共4页
Aeronautical Science & Technology
关键词
辅助动力装置
非包容转子碎片
机体结构
平动风险角
有限元模型
剩余强度
auxiliary power unit
uncontained rotor fragments
airframe structure
translational risk angles
FEMs residual strength
