摘要
将层级和梯度相结合,通过六边形管的层级梯度演化,设计出了一种新型的层级梯度六边形管。采用验证的有限元模型开展了0阶、1阶和2阶管的轴向冲击耐撞性分析。结果表明,结构的阶数越高,吸能效果越好,2阶层级梯度六边形管的能量吸收明显高于0阶和1阶管,相比0阶六边形管,2阶管的比能量吸收提高了38.86%,冲击力效率提高了42.66%。不同壁厚配置的2阶层级梯度六边形管的力-位移曲线明显不同,不同组成部分的壁厚对结构耐撞性具有较大的影响。3种不同配置的初始峰值力相差不大,但1.0-1.0-1.0配置的冲击力效率最高,达到65.05%。最后,构建并验证了代理模型,开展了结构参数对耐撞性影响的参数化分析,采用第二代非支配排序遗传算法开展了多目标优化,获得了Pareto前沿和最优设计解,并对优化结果的准确性进行了验证。
Combining hierarchies and gradients,a novel hierarchical gradient hexagonal tube was designed through the hierarchical gradient evolution of hexagonal tube.The axial impact crashworthiness analysis for the 0 order,1 order and 2 order tubes was analyzed using validated finite element model.The results show that the higher the order,the better the energy absorption,and the energy absorption of the 2 order hierarchical gradient hexagonal tube is significantly higher than that of the 0 order and 1 order tubes.Compared with the 0 order hexagonal tube,the specific energy absorption of 2 order tube is increased by 38.86%,and the crush force efficiency is increased by 42.66%.The force-displacement curves of the 2 order hierarchical gradient hexagonal tubes with different wall thickness configurations are significantly different.The wall thickness of different components has a great influence on the structural crashworthiness.The initial peak force of the three different configurations has little difference,but the configuration of 1.0-1.0-1.0 has the highest crush force efficiency,reaching 65.05%.Finally,a surrogate model was constructed and verified,the impact of structural parameters on crashworthiness was analyzed by parametric analysis.The non dominated sorting genetic algorithm-II was used to carry out multi-objective optimization,the pareto frontier and optimal design solutions were obtained,and the accuracy of optimization results was verified.
作者
覃善甘
邓小林
刘鑫炎
刘夫云
QIN Shan-gan;DENG Xiao-lin;LIU Xin-yan;LIU Fu-yun(School of Mechanical Engineering,Guangxi University,Nanning 530004,China;School of Electronics and Information Engineering,Wuzhou University,Wuzhou 543002,China;Farsoon Technologies,Changsha 410000,China;School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin 541004,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2023年第7期194-204,共11页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(52065059)
广西科技基地和人才专项(2020AC19011)
广西研究生教育创新计划(YCSW2022001)。
关键词
耐撞性
层级梯度
六边形管
多目标优化
crashworthiness
hierarchical gradient
hexagonal tube
multi-objective optimization
