LEAP-1C发动机风扇叶片符合性验证方法  

Approach for Compliance Verification of LEAP-1C Engine Fan Blade

作　　者：赵希宁 张永旺 施松迪 ZHAO Xining;ZHANG Yongwang;SHI Songdi(Zhengzhou University of Aeronautics,Zhengzhou 450046,China)

机构地区：[1]郑州航空工业管理学院,河南郑州450046

出　　处：《郑州航空工业管理学院学报》2025年第2期43-51,共9页Journal of Zhengzhou University of Aeronautics

基　　金：国家自然科学基金面上项目(11972050)。

摘　　要：针对新一代涡扇发动机LEAP-1C,探讨了发动机风扇叶片适航性设计和符合性验证方法。首先对LEAP-1C发动机风扇叶片进行结构建模并进行有限元分析,分析风扇叶片在受到560MPa载荷下是否具有结构符合性,发现发动机风扇叶片在受到压力载荷后静态变形较小,得出LEAP-1C风扇叶片符合结构符合性要求。其次对LEAP-1C发动机风扇叶片的振动进行符合性验证,验证过程中引入风扇叶片共振裕度大于10%以及风扇叶片动应力裕度不小于30%两个要求,结合模态振动分析,验证不同振动模态下发动机风扇叶片的振动符合性,得出只有在高阶模态下不符合共振裕度要求。最后针对LEAP-1C风扇叶片的鸟撞符合性验证,采用有限元仿真软件模拟大、中两种鸟撞模型,在特定速度下撞击风扇叶片左中右三个部位,从叶片变形的角度提出符合性验证标准,验证了LEAP-1C发动机叶片的鸟撞符合性。This paper investigates the airworthiness design and compliance verification method for the fan blade of the next-generation LEAP-1C turbofan engine. Firstly, a structural model of LEAP-1C engine fan blade is modeled and finite element analysis is carried out to analyze its structural compliance under 560MPa load. The results indicate that LEAP-1C fan blade exhibits small static deformation under pressure loads, meeting the structural compliance requirement. Secondly, vibration compliance of the LEAP-1C engine fan blade is verified, which introduces two criteria: a resonance margin greater than 10% and a dynamic stress margin no less than 30%. Modal vibration analysis is conducted to verify the vibration compliance under different vibration modes. It is concluded that the resonance margin requirements are met in all cases except for higher-order vibration modes. Finally, bird strike compliance verification is carried out by using finite element simulation software, modeling impacts with medium and large birds. Simulations are conducted at predetermined velocity, impacting the left, center, and right sections of the fan blade. Based on the blade deformation characteristics, compliance assessment criteria are established, confirming that the LEAP-1C fan blade can meet bird strike resistance requirements.

关 键 词：风扇叶片 符合性验证 模态振动 鸟撞 

分 类 号：TK433.2[动力工程及工程热物理—动力机械及工程]