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Crashworthiness design of transport aircraft subfloor using polymer foams

机译：使用聚合物泡沫的运输飞机地板的耐撞性设计

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摘要

An innovative crashworthiness subfloor design concept was developed for middle or larger transport aircrafts. Closed-cell Rohacell-31 polymer foam blocks were introduced into the aircraft subfloor to enhance the energy absorption capability and mitigate peak acceleration during crash. Eight different configurations of foam blocks' longitudinal distribution were considered. To provide a cost-effective method for assessing fuselage crashworthiness, compelling finite element models of an aircraft fuselage for these configurations were developed and vertical drops of the fuselage models were then simulated using the non-linear finite element code LS-DYNA. Impact responses, including failure behaviour, energy absorption and acceleration characteristics, were obtained and detailed effects of different foam block configurations on the crashworthiness was discussed. The analysis of the results showed that the optimal foam block length is 100-126 mm in our studied cases. The fuselage failure mode appeared to be symmetric, energy absorption by foam blocks became more efficient, peak acceleration transmitted to the occupants showed a remarkable reduction and the secondary impact was prevented.
机译：为中型或大型运输机开发了一种创新的耐撞性地板设计概念。闭孔的Rohacell-31聚合物泡沫块被引入飞机地板，以增强能量吸收能力并减轻碰撞时的峰值加速度。考虑了八个不同形状的泡沫块的纵向分布。为了提供一种经济有效的评估机身防撞性的方法，针对这些配置开发了引人注目的飞机机身有限元模型，然后使用非线性有限元代码LS-DYNA模拟了机身垂直垂降。获得了冲击响应，包括失效行为，能量吸收和加速特性，并讨论了不同泡沫块配置对耐撞性的详细影响。结果分析表明，在我们的研究案例中，最佳的泡沫块长度为100-126 mm。机身故障模式似乎是对称的，泡沫块吸收的能量变得更加有效，传递给乘员的峰值加速度显着降低，并防止了二次撞击。

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  • 来源
    《International journal of crashworthiness》 |2011年第4期|p.375-383|共9页
  • 作者

    Jianqiang Zheng; Jinwu Xiang; Zhangping Luo; Yiru Ren;

  • 作者单位

    School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China;

    School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China;

    School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China;

    School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    transport aircraft; crashworthiness; foam; acceleration; failure behaviour; energy absorption;

    机译：运输飞机;耐撞性泡沫;加速失败行为;能量吸收;

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