一种航空发动机风扇叶片的强度分析

Strength Analysis of an Aeroplane Engine’s Fan Blade

摘要: 航空发动机是一种具有严格气动负荷、机械负荷，且要求强耐久性的热动力机械，它是由许多零部件和附件组成的复杂系统，其可靠性和寿命直接影响着飞行的安全性，而航空发动机的寿命，很大程度上取决于主要零部件的寿命。本文对国内B737民航班机CFM56发动机的风扇叶片的强度展开了一系列研究，为提高发动机可靠性提供了参考价值。利用CATIA自带的有限元软件建立了发动机风扇的有限元模型，分别计算了风扇在不同转速下的离心应力分布和不同转速下扭矩对风扇的影响，并对其静强度进行了强度校核。

Abstract: Aero-engine is a kind of thermodynamic machinery with strict aerodynamic load, mechanical load and strong durability. It is a complex system composed of many parts and accessories. Its reliability and longevity directly affect the flight safety, and the life of the aero engine, largely depends on the life of the main parts. In this paper, a series of studies are carried out on the strength of fan blades of B737 civil aviation CFM56 engines, which provides reference for improving the reliability of engines. The finite element model of engine fan is established by CATIA's finite element software, which calculates the centrifugal stress distribution of the fan at different speeds and the influence of the torque on the fan at different speeds, and the static strength has been checked.