不同管状和材料对结构能量吸收性能的影响

Effects of Section and Material of Tubes on Energy Absorption

提出了评价和比较各类管件结构的能量吸收性能的评估指标体系,具体指标为:有效行程比(ESR)、结构承载能力(NLC)、单位重量的能量吸收能力(SEA)、吸能有效率(EEA)和载荷波动度(ULC).为了分析截面和材料对管件能量吸收能力的影响,比较了铝合金和低碳钢2种材料的圆管和方管的能量吸收性能.结果表明:在相同密实度下,圆管的能量吸收能力要优于方管,且在同一截面的管件中,铝合金管件的能量吸收能力和载荷波动程度要优于低碳钢管件.

Based on our extensive studies in the last few years, a set of Key Performance Indicators（KPIs） is proposed to assess and compare the energy absorbing performance of tubular structures with various configurations so as to offer the guidelines for the design of energy absorbers whilst to archive optimization to a certain degree. The set of KPIs contains five indicators, which are Effective Stroke Ratio（ESR）, Non-dimensional Load-carrying Capacity（NLC）, Effectiveness of Energy Absorption（EEA）, Specific Energy Absorption（SEA）, and Undulation of Load-carrying Capacity（NLC）. In this paper, a series of diagrams is presented to compare the energy absorbing performance of circular and square tubes made in aluminum and mild steel in terms of the five KPIs. The results show that the energy absorption capacity of circular tubes is superior to that of square tubes, although their KPIs as the functions of solidity ratio usually follow similar trends. It is also found that the specific energy absorption and undulation of aluminum tubes are superior to that of the mild steel tubes.