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航空发动机复合材料风扇叶片抗鸟撞性能考核验证

Assessment and Verification on Bird Impact Performance of Composite Fan Blades of Aircraft Engine

  • 摘要: 为了考核验证新构型复合材料风扇叶片的抗鸟撞性能,开展与服役工况等效的不同位置和不同撞击速度下复合材料风扇叶片的鸟撞试验。通过测量鸟弹撞击速度、叶片变形和应变响应,结合高速摄像观察撞击的整个过程,包括切鸟姿态与偏转角度等撞击姿态信息,再与试验后无损检测结果等信息结合,综合评估风扇叶片的抗鸟撞性能与损伤破坏模式。研究发现,该复合材料风扇叶片具有良好的抗鸟撞性能,在吸能的同时不易导致裂纹扩展,且前缘钛合金包边的设计有力提升了其抗冲击特性,在不同撞击工况下只出现纤维和基体的局部损伤,并未出现掉块、断裂、脱落等现象。本研究得出的结论可为抗鸟撞性能评估以及进行旋转风扇叶片鸟撞试验考核提供支撑。

     

    Abstract: In order to assess and verify the bird impact resistance of new configuration composite fan blades, according to the service conditions, the bird impact tests of composite fan blades at different positions and different impact speeds are carried out, and the speed, deformation and strain response of the blades impacted by bird bombs are measured. The whole impact process is recorded by high-speed camera, and the damage modes of composite fan blades are analyzed by nondestructive test. It is found that the composite fan blade has good energy absorption characteristics, and its impact resistance is greatly enhanced by titanium alloy wrapping at the leading edge. Under different impact conditions, only the local damage of fiber and matrix occurs, and there are no phenomena such as breaking and falling off. The conclusions obtained can provide reliable data for the evaluation of bird impact resistance and the verification of bird impact simulation analysis.

     

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