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能量吸收结构的性能对航空、航天等领域的人员和结构防护非常重要。针对一种系列嵌套圆环系统的能量吸收特性进行了理论、数值和实验研究。首先建立了考虑应变强化效应的系列嵌套圆环系统受刚性平板横向准静态压缩时的刚塑性理论模型;然后对双环和三环嵌套圆环系统进行了准静态压缩实验及有限元数值模拟,理论预测、数值模拟和实验测得的系列嵌套圆环系统的载荷-挠度曲线吻合很好;最后对将系列嵌套圆环系统应用到航空领域进行了探讨,以应用至航空座椅为例,建立了人体、座椅、能量吸收结构的数学模型,参照美国航空联邦局航空座椅动态实验标准,基于该模型计算得到了人体所受的腰椎负荷,并与不装备能量吸收结构时的腰椎负荷进行了比较,结果表明应用系列嵌套圆环系统可以有效地对人体进行防护。
The performance of energy-absorbing structures is important for personnel and structural protection in the aerospace and aerospace fields. Theoretical, numerical and experimental studies on the energy absorption characteristics of a series of nested annular systems were carried out. First of all, a rigid-plastic theoretical model of a series of nested ring systems considering the strain hardening effect is obtained under the condition of quasi-static compression in the transverse direction of the rigid plate. Then quasi-static compression experiments and finite element numerical simulations , The theoretical prediction, numerical simulation and experimentally measured load-deflection curves of a series of nested annular systems are in good agreement. Finally, the application of the series of nested annular systems to the aerospace field is discussed, For example, the mathematical models of the human body, the seat and the energy absorption structure are established. According to the dynamic test standard of the American Airlines aviation seat, the lumbar load on the human body is calculated based on the model, Lumbar load were compared, the results show that the application of a series of nested ring system can effectively protect the human body.