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Hierarchical anisogrid stiffened composite panel subjected to blast loading: Equivalent theory

机译：爆炸载荷作用下的分层异质格栅加筋复合板的等效理论

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摘要

Hierarchical anisogrid stiffened panels (HASPs) have two-level stiffeners. The primary stiffeners improve the global stiffness of the HASP and the sub-stiffeners enhance the local stiffness of the mono-cell skin supported by the primary stiffeners. A smearing method was proposed to homogenize the HASP into a homogenous panel, based on two-step equivalences of extensional rigidities and bending rigidities. Dynamic responses of blastloaded HASPs were analyzed based on the homogenous panel and the mode superposition method and validated by finite element (FE) analysis. Commonly the HASP vibrates like a homogenous panel and the theoretical prediction is accurate. Local mono-cell vibration appears only when the skin and the sub-stiffeners are weak enough. The model was applied to analyze the blast response of a composite protective door. Failure criterion based on maximum strain was proposed to predict the peak blast pressure the HASP can bear. The equivalent theory has good accuracy, providing a feasible way to analyze blast responses of HASPs.
机译：分层的等距加劲肋板（HASP）具有两级加劲肋。主加强筋提高了HASP的整体刚度，子加强筋提高了主加强筋支撑的单胞蒙皮的局部刚度。基于拉伸刚度和弯曲刚度的两步当量，提出了一种涂抹方法将HASP均质化为均质面板。基于均质面板和模态叠加法分析了爆破HASP的动力响应，并通过有限元（FE）分析对其进行了验证。通常，HASP像均匀的面板一样振动，并且理论预测是准确的。仅当皮肤和次加筋板足够脆弱时，才会出现局部单细胞振动。该模型用于分析复合防护门的爆炸响应。提出了基于最大应变的破坏准则，以预测HASP可以承受的爆炸峰值压力。等效理论具有很好的准确性，为分析HASP爆炸反应提供了一种可行的方法。

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  • 来源
    《Composite Structures》 |2018年第3期|259-268|共10页
  • 作者

    Zhang Bei; Jin Fengnian; Zhao Zheng; Zhou Zhongxin; Xu Ying; Chen Hailong; Fan Hualin;

  • 作者单位

    PLA Army Engn Univ, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    PLA Army Engn Univ, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    PLA Army Engn Univ, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    PLA Army Engn Univ, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    PLA Army Engn Univ, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    PLA Army Engn Univ, State Key Lab Disaster Prevent & Mitigat Explos &, Nanjing 210007, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Jiangsu, Peoples R 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

    Hierarchical anisogrid stiffened panel; Smearing method; Blast response;

    机译：分层等距加筋板涂抹方法爆炸响应;

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