航空学报 > 2008, Vol. 29 Issue (3): 627-633

带油箱结构的机身框段坠撞仿真分析

何欢,陈国平,张家滨   

  1. 南京航空航天大学 振动工程研究所
  • 收稿日期:2007-08-02 修回日期:2008-04-07 出版日期:2008-05-20 发布日期:2008-05-20
  • 通讯作者: 何欢

Crash Simulation of a Fuselage Section With Fuel Tank

He Huan, Chen Guoping, Zhang Jiabin   

  1. Institute of Vibration Engineering Research, Nanjing University of Aeronautics and Astronautics
  • Received:2007-08-02 Revised:2008-04-07 Online:2008-05-20 Published:2008-05-20
  • Contact: He Huan

摘要:

主要研究了任意拉格朗日/欧拉耦合方法计算带油箱的机身框段的坠撞过程。首先,建立了带油箱结构的机身框段坠撞分析模型,包括机身框段结构模型和欧拉流体模型。采用水代替油箱内部燃油,考虑了不同装水量对机身框段耐撞性的影响。分析了坠撞过程中的液体晃动和泼溅与机身坠撞响应的影响,给出了装水量和机身框段最大垂向压缩位移、最大过载和能量吸收等参数之间的关系。通过仿真分析,揭示了冲击载荷作用下油箱内部燃油量对机身框段各个部分结构的损伤破坏的影响。研究指出,在垂直撞击环境下,机身加强框和蒙皮是主要的吸能结构。在油箱内装水量多的情况下,油箱结构的吸能作用不能忽略。给出了应急着陆或可生存坠撞事故发生前,飞行员所应采取的紧急措施。

关键词: 任意拉格朗日/欧拉耦合, 耐撞性, 油箱结构, 机身框段

Abstract:

A numerical model for the crash simulation of a fuselage section with a fuel tank is developed in this paper. The fluidstructure interaction is considered in the impact simulation using the arbitrary Lagrangian/Eulerian coupling method. The whole model consists of a finite element model of the fuselage section with a fuel tank and an Eulerian model of the water inside the fuel tank, which is used instead of fuel. Crashworthiness of the fuselage section under the influence of the water volume inside the fuel tank is taken into account.

Key words: arbitrary , Lagrangian/Eulerian , coupling,  , crashworthiness,  , fuel , tank,  , fuselage , section

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