直升机尾桨轴疲劳试验技术研究

Fatigue Test Technique Research of Helicopter Tail Rotor Mast

尾桨轴为直升机传动系统中的关键部件,疲劳破坏为其主要的失效模式。本文结合某直升机尾桨轴的疲劳试验,介绍了疲劳试验设计、试验实施方案设计的工作内容和方法。考虑试验的考核要求,对锥齿面啮合处约束边界进行工程简化,设计了防扭结构。将试验载荷分解到作动器上进行协调加载,实现旋转弯矩和剪力绕尾桨轴轴线的旋转,模拟了真实载荷的传递和分布。根据飞行谱和使用载荷确定低周疲劳载荷谱,并给出了既满足加载要求,又易于实现的加载方法。

Tail rotor mast is one of the most crucial components in the transmission system of helicopter.Fatigue damage is its main failure mode.The content and method of fatigue test and test implement project design are introduced,and example on some tail rotor mast fatigue test is shown.Restriction boundary at gear mesh position is simplified and anti-torsion structure is designed considering test request.Test load is disassembled to actuator to load harmoniously,and to realize the rotating around tail rotor mast ...