铝蜂窝串联缓冲结构静态压缩仿真与试验研究  

Numerical and experimental analyses on series aluminum honeycomb structures under quasi-static load

作　　者：李萌[1] 刘荣强[1] 罗昌杰[2] 郭宏伟[1] 丁北辰[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,哈尔滨150080 [2]中国科学院深圳先进技术研究院,深圳518000

出　　处：《振动与冲击》2013年第9期50-56,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(50775048);高速列车铝蜂窝吸能器的关键技术研究及产业化(2011A090100019)

摘　　要：为更好设计多级铝蜂窝缓冲结构,为星球着陆器缓冲结构设计提供理论依据,对串联式铝蜂窝结构进行静态压缩的仿真与试验研究。针对仿真模型规格的多样性,为提高仿真效率,基于PCL语言编写参数化建模分析程序,实现有限元模型的自动建立。通过与理论公式及试验结果对比,证明有限元模型可准确计算串联铝蜂窝缓冲结构受静态压缩载荷作用下的平均应力及极限应变值,能准确提供整个变形过程铝蜂窝所受载荷信息。与传统的试验方法相比,该有限元仿真模型计算成本低、不受试验条件限制,且有较高的计算精度。仿真与试验研究表明,对同一尺寸蜂窝,与单个铝蜂窝缓冲器相比,串联式组合铝蜂窝缓冲器能吸收更多的能量。In order to design high quality multi-level aluminum honeycomb buffer structures and provide theoretical basis on designing energy-absorber structures for space landing device, numerical and experimental studies were carried out on series aluminum honeycomb structures under quasi-static load. Patran parameters design language(PCL) was applied to make an analysis program, which will provide convenience to automatically accommodate the parametrized FE model to suit the cases of different lengthes and foil thicknesses of honeycomb cells. Comparisons between experimental and theoretical analysis results show that the numerical model can provide accurately the mean stress and strain limit of the honeycomb as well as the loads subjected on honeycomb during the whole deformation process. Numerical simulation has the advantage of low cost and high precision compared with experiments. The results also show that series honeycomb structures can absorb more energy than single honeycomb structure.

关 键 词：参数化建模 吸能性 串联蜂窝结构 数值仿真 试验研究 

分 类 号：U467.14[机械工程—车辆工程]