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开展轻质复合材料风扇包容机匣的研究,对大型民用涡扇发动机的减重设计具有重要意义。为研究Kevlar纤维束编织布缠绕增强机匣的包容过程,在立式试验台上进行高速旋转平板叶片撞击Kevlar缠绕增强铝合金内层机匣的包容试验,并采用显式瞬态动力学软件LS-DYNA对撞击过程进行数值仿真。结果表明:叶片撞击机匣的过程可分为3个阶段,其中包括两次主要的撞击;断叶的冲击动能大部分由Kevlar纤维束编织布吸收;断叶包容过程中外层纤维布会产生较大的鼓包变形,鼓包的大小和位置随叶片运动而改变。
Carrying out research on lightweight composite material fan casing is of great significance to weight reduction design of large civil turbofan engine. In order to study the containment process of Kevlar fiber bundle braided wrapping and reinforcing case, the inclusion test of Kevlar wrapping reinforced aluminum alloy inner case with high speed rotating slab blades was carried out on a vertical test stand, and the explicit transient dynamics software LS -DYNA Numerical simulation of impact process. The results show that the process of the blade hitting the casing can be divided into three stages, including two main impacts; the impact kinetic energy of the broken leaves is mostly absorbed by Kevlar fiber woven cloth; the outer fiber cloth will produce more Large bulge deformation, bulging the size and position with leaf movement change.