直升机旋翼电加热组件高频热载疲劳试验研究

为探索直升机旋翼桨叶电加热组件在直升机旋翼高频振动复合热载工况下的疲劳寿命、可靠性以及相应的测试方法,在设计完成的地面疲劳试验系统的基础上,研究制定合理的直升机旋翼桨叶工况模拟方案,选用共振法为疲劳试验方法,实现对电加热组件疲劳寿命的快速测试,同时探索模拟件表面应变与振动台加速度之间关系,为在不同动载荷条件下疲劳试验提供应变调节方案。

Research on High Frequency Thermal Load Fatigue Test of Helicopter Rotor Electric Heating Module

For exploring the fatigue life,reliability and the corresponding test method of helicopter rotor blade electric heating component in the environment of high frequency vibration and thermal load conditions,this paper researches on the simulation scheme suitable for the helicopter rotor blade working condition,based on the designed ground fatigue test system and selects the resonance method as the fatigue test method which is used to rapidly test the fatigue life of electric heating components.At the same time,the relationship between the surface strain of the simulated part and the moving coil acceleration of the shaking table is explored.The strain-controlled scheme is provided for the fatigue test and the different load conditions.