斜向载荷下多胞方管结构的压溃特性研究  

Collapse characteristics of multi-cell square tube structure under oblique load

作　　者：李志超 康英姿[1] 甄冉 李瑞龙 上官文斌[1] LI Zhichao;KANG Yingzi;ZHEN Ran;LI Ruilong;SHANGGUAN Wenbin(School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China;Shandong Meichen Industry Group Co.,Ltd.,Weifang 262200,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640 [2]山东美晨工业集团有限公司,山东潍坊262200

出　　处：《振动与冲击》2020年第21期95-100,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51475171)。

摘　　要：建立了计算多胞方管能量吸收特性的有限元模型,利用双胞管的轴向压溃变形试验验证有限元模型的准确性。利用建立的有限元模型,研究了在斜向加载下多胞方管结构的压溃特性,结果表明:在大角度的斜向加载下,多胞方管会发生全局弯曲,导致能量吸收能力的显著下降。提出了分层多胞方管结构,在斜向加载下分层多胞方管结构有较大的能量吸收能力和压溃力效率。此外,在大角度的斜向加载下,分层多胞方管可以避免发生全局弯曲。通过复杂比例评价方法,评价了传统方管、多胞方管和分层多胞方管的斜向综合碰撞性能,确定了分层多胞方管L5具有最优的斜向碰撞性能。The finite element model for calculating energy absorption characteristics of multi-cell square tube structure was established, and axial collapse tests of double-cell tubes were used to verify the correctness of the established model. The developed model was used to study collapse characteristics of multi-cell square tube structure under oblique load. Results showed that multi-cell square tube structure can have the global buckling deformation under oblique loads with angles of 20°and 30° to cause significant drop of its energy absorption capacity. Thus, a layered multi-cell square tube structure was proposed. It was shown that the layered multi-cell square tube structure has a larger energy absorption capacity and crushing force efficiency under oblique loading;under oblique loads with large angles, it can avoid the global buckling deformation. Using the complex proportion assessment method, oblique comprehensive impact performances of traditional square tubes, multi-cell ones and layered multi-cell ones were evaluated to determine the layered multi-cell square tube L5 having the optimal oblique impact performance.

关 键 词：能量吸收 多胞薄壁方管 斜向加载 有限元分析 

分 类 号：U467.14[机械工程—车辆工程]