非凸截面管与多胞方管轴向冲击能量吸收性能对比研究

A comparative study of energy absorption performance of non-convex multi-corner and multi-cell square columns subject to axial crush

研究了非凸薄壁管在轴向冲击下的能量吸收性能,并与方管以及多胞方管进行了比较分析。首先,采用显式非线性有限元分析软件ANSYS/LS-DYNA对比分析了这三类薄壁管在壁厚相同情况下的能量吸收性能。然后,在一定的材料用量限制(相同的质量)、一定的能量吸收量需求以及一定的极限峰值力要求等三种情况,比较了这三类截面薄壁管的冲击能量吸收性能。研究表明,非凸截面管在所研究的四种条件下无论在能量吸收效率还是在载荷一致性方面都远远优于方管。此外,非凸截面薄壁管在能量吸收效率方面也显著优于多胞方管,在载荷一致性方面与多胞方管相比各有优劣。

Energy absorption of non-convex multi-corner thin-walled columns subject to axial crush were investigated, and their performance were compared with square and multi-cell square columns. First, the three types of columns with the same wall thickness were investigated using explicit non-linear finite element software ANSYS/LS-DYNA. And then, investigation of their energy absorption under three different requirements were carried out, which were the same amount of material usage, the same amount of energy absorption and the same maximum peak force. The results showed, non-convex multi-corner columns were superior to square column as energy absorber no matter in specific energy absorption or crush force efficiency. Non-convex multi-corner columns performed better than multi-cell square column except for crush force efficiency in some cases.