Research on lightning strike mechanism and protection of metal civil aircraft

This article studies the mechanism and protection requirements of lightning strikes on domestic civil aircraft. Based on the characteristics of lightning strikes and the particularity of aircraft operating space, the lightning protection characteristics and specific requirements of civil aircraft are explained. According to the airworthiness regulations and actual engineering cases of lightning protection, the airworthiness certification requirements of SAE regulations are listed, and different lightning protection requirements are given according to different protection zones. Finally, this article specifically analyzes the thickness issue of the wing fuel tank area of civil aircraft, and provides lightning protection requirements and solutions for the wing fuel tank area. This article summarizes the key factors of lightning protection design and provides specific solutions based on airworthiness clauses, providing design basis for the detailed design phase of aircraft and supporting subsequent civil aircraft lightning protection design.