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首页> 外文期刊>International journal of crashworthiness >Impact characteristics and crashworthiness of multi-cell, square, thin-walled, structures under axial loads
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Impact characteristics and crashworthiness of multi-cell, square, thin-walled, structures under axial loads

机译：轴向载荷下多格方形薄壁结构的冲击特性和耐撞性

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摘要

To study the crashworthiness of single-and multi-cell, square structures under axial loads, the response surface models of these structures were established separately by using the polynomial response surface method (PRSM). The models describe the response surfaces of specific energy absorption (SEA), peak crushing force F-max and mean crushing force F-avg under the variation of the side-length a, wall thickness t and number of cells N in the structure. The results showed that for the square thin-walled structures with the same N, the SEA basically increases with wall thickness t and decreases with side-length a; F-max increases with t and a, while F-avg increases with t but remained unchanged with a. Besides, under the same dimensional parameters (identical a and t), the larger the value of N, the larger the values of SEA, F-max and F-avg. When other parameters are the same, with the progress of the crushing distance in a collision, structures with large side-length a, wall thickness t and number of cells N are subjected to large crushing forces and therefore the kinetic energy generated in the collision, and absorbed by these structures, is large; however, for parameters t and N, the crushing force and absorption energy change only slightly with a.
机译：为了研究单单元和多单元方形结构在轴向载荷下的耐撞性，使用多项式响应面法（PRSM）分别建立了这些结构的响应面模型。这些模型描述了在结构的边长a，壁厚t和孔数N的变化下，比能量吸收（SEA），峰值压碎力F-max和平均压碎力F-avg的响应面。结果表明，对于N相同的正方形薄壁结构，SEA随壁厚t的增加而增加，随边长a的增加而减小； F-max随t和a增加，而F-avg随t增加，但随a保持不变。此外，在相同的尺寸参数（相同的a和t）下，N的值越大，SEA，F-max和F-avg的值就越大。当其他参数相同时，随着碰撞中破碎距离的增加，具有较大的边长a，壁厚t和孔数N的结构将承受较大的破碎力，因此在碰撞中产生的动能会增大，并且被这些结构吸收，很大；但是，对于参数t和N，压紧力和吸收能仅随a的变化很小。

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  • 来源
    《International journal of crashworthiness》 |2017年第6期|503-517|共15页
  • 作者

    Xie Suchao; Yang Weilin; Li Haihong; Wang Ning;

  • 作者单位

    Cent S Univ, Key Lab Traff Safety Track, Minist Educ, Changsha, Hunan, Peoples R China|Cent S Univ, Sch Traff & Transportat Engn, Changsha, Hunan, Peoples R China;

    Cent S Univ, Key Lab Traff Safety Track, Minist Educ, Changsha, Hunan, Peoples R China|Cent S Univ, Sch Traff & Transportat Engn, Changsha, Hunan, Peoples R China;

    Cent S Univ, Key Lab Traff Safety Track, Minist Educ, Changsha, Hunan, Peoples R China|Cent S Univ, Sch Traff & Transportat Engn, Changsha, Hunan, Peoples R China;

    Cent S Univ, Key Lab Traff Safety Track, Minist Educ, Changsha, Hunan, Peoples R China|Cent S Univ, Sch Traff & Transportat Engn, Changsha, Hunan, 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

    Multi-cell structure; axial impact; polynomial response surface method; impact characteristics; crashworthiness;

    机译：多单元结构轴向冲击多项式响应面法冲击特性耐撞性;

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