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飞机水上迫降已成为适航取证不可缺少的一部分。飞机撞水过程属于复杂的流固耦合模型,从发生在2014年震惊全球的马航MH370航班失事重大事故的背景出发,依据流固耦合理论为基础,对失事客机波音B777-20ER进行非计划的水上迫降冲击动力学分析研究。利用有限元仿真软件ABAQUS采用耦合欧拉-拉格朗日算法(CEL)模拟失事飞机在无计划情况下撞水过程。根据马航MH370官方发布的事故搜救信息和安全调查讨论,建立合理的飞机撞水有限元模型,对不同工况下进行数值模拟,着重讨论飞机偏转角和飞机翼尖压强变化趋势,验证采用CEL法研究飞机水上迫降性能的可行性,也为研究水上迫降和航空失事飞机搜救调查提供参数指导和技术参考。
Airplane water landing has become an indispensable part of airworthiness certification. The aircraft collision process is a complex fluid-structure interaction model. Based on the background of a major accident that affected the Malaysia Airlines MH370 flight which stunned the world in 2014, based on the fluid-solid coupling theory, the aircraft B777-20ER was unplanned Study on Dynamic Analysis of Drought Impact. Using the finite element simulation software ABAQUS, coupled Eulerian-Lagrangian algorithm (CEL) was used to simulate the collision process of the plane without any plans. According to the official search and rescue information and safety investigation published by MH370, a reasonable airplane impact finite element model is established and numerical simulation is conducted under different operating conditions. The deflection angles of aircraft and the tip pressure variations are mainly discussed. The CEL method Study the feasibility of the aircraft’s water-landing performance and also provide parameter guidance and technical reference for the research on the search and rescue of the water-landing and aviation-induced aircraft.