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Dynamic Response of a Single-Layer Reticulated Dome during Aircraft Impact Based on S-J Modeling Method

机译：基于S-J造型方法的飞机冲击过程中单层网状圆顶的动态响应

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摘要

In previous numerical models developed for the impact dynamic responses of reticulated domes, mostly BEAM 161 elements and piecewise linear plastic material model have been employed and spherical joints have been simplified as intersection points of beams, which is called the B-P method. The B-P method can be employed in studying the dynamic responses of reticulated shells under low- to moderate-speed impacts with no obvious temperature effect. However, the analysis of the dynamic responses of reticulated shells under moderate- and high-speed impacts of missiles and other aircraft using this method had errors because it could not take into account the temperature effect. To accurately describe the mechanical responses of reticulated shells under aircraft impacts, the Johnson-Cook material model considering temperature effect with corresponding SHELL 163 element was selected for determining the members of the numerical model and the shell element was used to establish the spherical joints of reticulated shells; the whole process was called the S-J modeling method. This modeling method was capable of considering the effects of high strain rates, high temperatures, large strains, stress state change, and loading history. S-J and B-P methods were used to model the reticulated shell structures. Comparing the numerical analysis results of the drop hammer impact of the two developed methods with experimental results verified the accuracy of the S-J modeling method. In addition, based on the results obtained from the S-J modeling method and LS-DYNA finite element analysis software, a numerical model was established for small aircraft impact reticulated shells and the failure modes and dynamic responses of reticulated shell structures under aircraft impacts were studied. In terms of energy analysis, it was found that the effects of roof plates, spherical joints, and temperature softening could not be ignored in such studies.
机译：在以前用于网状圆顶的冲击动力响应的先前数值模型中，已经采用了梁161元件和分段线性塑料材料模型，并且已经简化了球形接头作为光束的交叉点，称为B-P方法。 B-P方法可以用于研究低至中等速度影响下的网状壳的动态响应，没有明显的温度效应。然而，使用该方法的导弹和其他飞机的中等和高速冲击下网状和高速影响的动态响应的分析具有错误，因为它无法考虑温度效应。为了准确地描述飞机冲击下网状壳的机械响应，考虑与相应的壳163元件的温度效应的约翰逊烹饪材料模型用于确定数值模型的构件，并且使用壳元件来建立网状关节的网状贝壳;整个过程称为S-J造型方法。该建模方法能够考虑高应变率，高温，大菌株，应力状态变化和装载历史的影响。 S-J和B-P方法用于模拟网状壳结构。比较实验结果的两种开发方法的下拉锤撞击的数值分析结果验证了S-J造型方法的准确性。另外，基于从S-J造型方法和LS-DYNA有限元分析软件获得的结果，为小型飞机冲击网壳建立了数值模型，研究了飞机冲击下的网状壳结构的故障模式和动力响应。在能量分析方面，发现在这些研究中，屋顶板，球形接头和温度软化的影响可能无法忽略。

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  • 来源
    《Shock and vibration》 |2019年第9期|9056810.1-9056810.12|共12页
  • 作者

    Lin Li; Huang Bo; Sun Yunhui; Zhu Yu; Wang Duozhi;

  • 作者单位

    Harbin Univ Sci & Technol Coll Civil Engn & Architecture Harbin 150080 Heilongjiang Peoples R China|Harbin Inst Technol Sch Civil Engn Harbin 150080 Heilongjiang Peoples R China;

    Harbin Univ Sci & Technol Coll Civil Engn & Architecture Harbin 150080 Heilongjiang Peoples R China;

    Harbin Univ Sci & Technol Coll Civil Engn & Architecture Harbin 150080 Heilongjiang Peoples R China;

    Harbin Univ Sci & Technol Coll Civil Engn & Architecture Harbin 150080 Heilongjiang Peoples R China;

    China Earthquake Adm Inst Engn Mech Harbin 150080 Heilongjiang 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
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