讨论了直升机动部件寿命管理中的安全寿命法和损伤容限法，以及基于安全寿命法的裂纹容限法和基于损伤容限法的缺陷容限法；重点介绍了安全寿命法的两大缺点和损伤容限法中要解决的三方面问题；比较了损伤容限法应用于直升机动部件与应用于固定翼飞机的不同点；回顾了国内外损伤容限法的发展历史和研究现状；介绍了损伤容限寿命管理方法的主要工作；展望了亟待解决的一些问题。

Several life management methods of helicopter dynamic components were discussed, such as safe-life method, flaw-tolerance method, damage-tolerance method and fault-tolerance method. The origin and the current status about damage-tolerance method in life management both at home and abroad were presented. In comparison with the fixed wing aircraft, three main aspects, which can make the damage tolerance approach very difficult to apply in practice to every helicopter dynamic components, were discussed. Several key technical settlements when damage tolerance method was put in practice in life management of helicopter dynamic components were expounded emphatically. Finally, future needs for research were highlighted.