叶片外物损伤容限设计的本质特点及设计准则的发展

通过对风扇/压气机叶片外物损伤及其失效特点的深入分析,认为叶片外物损伤容限设计的本质是考虑外物损伤影响的叶片振动应力设计.通过对国内外发动机设计规范和标准的分析和回顾,将外物损伤容限设计准则的发展分为3个阶段:①50年代初-60年代末,以外物损伤(FOD)的预防和维护为主;②70年代初-90年代末,等效为应力集中系数Kt≤3的缺口容限设计;③2000年以来,FOD的概率容限设计.最后对我国外物损伤容限设计的研究方向提出了建议.

Essential characteristic of foreign object damage tolerance design for airfoils in aeroengine and development of design criteria

Through the analysis of foreign object damage(FOD) and failure characteristic of fan and compressor airfoils,it was concluded that vibratory stress design and control of airfoils according to reduced material allowable due to FOD is the fundamental feature of FOD tolerance design.Then,by the analysis and review of specifications and standards for aeroengine,the development process of FOD tolerance design criteria was divided into three phases.In the first phase(1950s'-1960s'),FOD related failures were mainl...