陈彦达,范振民,李军.民用飞机机身段适坠性数值仿真分析[J].民用飞机设计与研 究,2020(2):43-50CHEN Yanda,FAN Zhenmin,LI Jun.[J].Civil Aircraft Design and Research,2020,(2):43-50.
民用飞机机身段适坠性数值仿真分析
  
DOI:10.19416/j.cnki.1674-9804.2020.02.010
中文关键词:碰撞  加速度  能量吸收
英文关键词:collision  acceleration  energy absorption
基金项目:
作者单位
陈彦达 东航技术应用研发中心上海 201707 
范振民 上海飞机设计研究院上海 201210 
李军 东航技术应用研发中心上海 201707 
中文摘要:在飞机紧急迫降过程中,首先要保证碰撞后乘客在客舱区域有足够的逃生空间,其次基于结构强度和撞击持续时间,要确保传递给乘客的加速度和冲击载荷必须降低到人体损伤容限以下。对飞机机身部分结构进行了有限元建模,模拟了其从4.27 m的高度开始坠落,产生9.14 m/s的垂直冲击速度,整个分析过程使用ABAQUS/Explicit计算完成。对机身碰撞后的整体变形展开研究,如机身选定位置的加速度时间历程以及关键结构部件的能量吸收历程,最后确定机身隔框对冲击过程中的能量吸收起着最重要的作用,其次为蒙皮和客舱地板梁。在机身结构的右侧(本文的方向为飞行员视角,与读者看到的方向左右相反)有货舱门和门框,由于机身结构的不对称性,造成左右两侧的速度和加速度不一致。
英文摘要:In the process of emergency landing, first of all, passengers should have enough escape space in the cabin area after the collision. Secondly, based on the structural strength and duration of impact, the acceleration and impact load transmitted to passengers must be reduced below the human injury tolerance. The finite element modeling of the airframe structure was carried out in this paper, and its falling from a height of 4.27 m and generating a vertical shock velocity of 9.14 m/s was simulated. ABAQUS/Explicit calculation was used to complete the entire analysis process. The overall deformation of the fuselage after collision was studied, such as the acceleration, time history of the selected position of the fuselage and the energy absorption process of key structural components. Finally, it was determined that the fuselage frame played the most important role in the energy absorption during impact, followed by skin and passenger floor beam. On the right side of the fuselage structure(the direction in this paper is from the pilot’s perspective, opposite to the left and right directions seen by readers), there were cargo door and cargo door frame. Due to the asymmetry of the fuselage structure, the speed and acceleration on the left and right sides were inconsistent.
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