直升机的雷击防护

Helicopters Lightning Protection

研究了目前世界上最大的重型直升机米-26受雷击毁坏事件,这次事故中雷击的直接损伤是尾桨后缘与玻璃钢管梁在剪切力和离心力作用下脱离,它对飞机的二次损伤是使尾斜撑动力不平衡,出现约1 m长的物理撕裂,飞机不能继续飞行而迫降。分析表明:闪电击中复合材料结构时可能会导致结构失效或大面积损伤,典型的闪电防护包括在复合材料结构的外表面有可能出现直接闪电附着的地方加上金属丝或金属网,以铝丝网为最佳。

After the lightning accident, Mi-26, the biggest heavy helicopter in the world, was studied.The direct damage of the lightning was on the trailing edge of tail rotor and glass reinforced plastic pipe girder de-tached by the sheering force and centrifugal force .They made the hammer brace unbalanced with a physical tearing about 1m as secondary damage.The aircraft had to make a forced landing after losing fight ability.The results show that when composite construction was hit by the lightning , structure failure and damage of large acreage would be the consequence .Typical lightning protection including adding wire and wire netting , such as alumium netting to the structure surface can increase greater possibility of direct lightning adherence .