摘要
分析了涡轮喷气发动机的振动与线弹性断裂力学（ＬＥＦＭ）的关系。以叶片为例，将Ｇｒｉｆｆｉｔｈ准则和叶片的振动应力，特别是共振应力联系起来分析。接着用振动与晶体变形的关系来分析各种裂纹扩展的原因和条件以及叶片共振时各种裂纹叠加的可能性。
n this paper, the relation between linear elastic fracture mechanics (LEFM)and vibration in turbojet is mainly analyzed.As and example, the stress in blades resulting from vibration, especially from resonance is also analyzed with Griffith criterion. The causes and the conditions of crackleextension are discussed based on the relation of vibration and crystal deformation. Finally,the possibiLity of crackle superimposure, when blades are in resonance, is discussed.
出处
《推进技术》
EI
CAS
CSCD
北大核心
1996年第1期58-63,共6页
Journal of Propulsion Technology
关键词
涡轮喷气发动机
涡轮
叶片
压缩机
断裂力学
Turbojet engine
Turbine blade
Compressor blade
Combustion vibration, Fracture mechanics
