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表面纳米化吸能薄壁多胞结构的数值模拟与设计
Numerical simulation and design on energy absorption for thin wall multicellular structures of the local surface nanocrystallization
投稿时间:2020-04-30  修订日期:2020-07-07
DOI:
中文关键词:  局部表面纳米化  多胞薄壁结构  能量吸收  数值模拟  优化设计
英文关键词:local surface nanocrystallization  multicellular thin-walled structure  energy absorption  numerical simulation  optimal design
基金项目:大连市科技创新基金双重项目(2018J11CY005); 工业装备结构分析国家重点实验室项目(GZ19109; S18313).
作者单位E-mail
王钧仡 大连理工大学工程力学系 wwwjjjyyy@mail.dlut.edu.cn 
仝真真 大连交通大学机车车辆工程学院 tongzhzh@163.com 
王伟 大连理工大学工程力学系  
屈建龙 大连理工大学工程力学系  
徐新生 大连理工大学工程力学系  
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中文摘要:
      本文采用局部表面纳米化技术和数值模拟方法,对金属薄壁多胞结构的吸能问题展开有限元数值分析和优化设计。结果显示,局部表面纳米化布局可诱导结构的屈曲变形并能大幅度提高结构的能量吸收。优化结果还发现,在多胞外壁呈交错矩形格状表面纳米化格局和内附加结构呈均布框架式矩形格状表面纳米化布局情况下,结构屈曲变形稳定且吸能效果最优。该结果和结论为吸能结构的设计提供了依据。
英文摘要:
      Adopting the technology of local surface nanocrystallization and method of numerical simulation, the energy absorption of multicellular thin-walled metal structures is researched by using finite element analysis and optimization design in this paper. Results show that the local surface nanocrystallization can induce the buckling deformation of the structures and greatly improve the energy absorption. The results of optimization also show that the buckling deformation of the structures is stable and the effect of energy absorption is optimal under special conditions, in which the outer wall of the multicellular thin-walled structure is distributed by staggered rectangles of nanocrystallization and the inner additional structures are dispersed by framed nanocrystallization of uniformly distributed rectangular shapes. The results and conclusions provide a basis for the design of energy absorption structure.
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