基于年飞行强度的飞机日历寿命研究

Calendar Life of Aircraft Based on Annual Flight Frequency

针对军用飞机飞行小时数较低、飞机寿命主要由日历寿命确定的状况,提出了一种基于年飞行强度的日历寿命方法。该方法以一般环境下的疲劳定寿结论为前提,通过地面停放腐蚀影响系数C和空中腐蚀影响系数K的逐年修正获得动态、视情的飞机日历寿命。算例表明该方法既可以确定给定年飞行强度下的飞机日历寿命,又可以为现役飞机的日历寿命控制与延寿提供一种可行的方法。

The life of aircraft structure is determined by calendar life in the service circumstances for the lower flight time per year of the aircraft. The method of determining the calendar life based on annual flight frequency is proposed according to the conclusion of pure fatigue life in this paper. The residual calendar life of aircraft raring with annual flight frequency is obtained by modifying the parking corrosion influence factor （C） and the flight corrosion fatigue influence factor （K）. The corresponding test is carried out and the results show that the proposed method not only can determine the calendar life of air craft under given annual fight intensity , but also can provide a feasible method to control and delay the calendar life of the service aircraft.