蜂窝轴向压缩实验与仿真分析方法研究  

Study on honeycomb axial compression test and simulation analysis method

作　　者：车全伟[1,2] 姚曙光[2] 肖娴靓 CHE Quanwei;YAO Shuguang;XIAO Xianliang(CRRC Qingdao Sifang Co. Ltd., Qingdao 266111, China;Key Laboratory for Track Traffic Safety of Ministry of Education, Central South University, Changsha 410075, China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266111 [2]中南大学轨道交通安全教育部重点实验室,湖南长沙410075

出　　处：《铁道科学与工程学报》2017年第5期1049-1055,共7页Journal of Railway Science and Engineering

基　　金：国家自然科学基金重点资助项目(51675537);国家支撑计划资助项目(2015BAG12B01-22);教育部重点资助项目(113051A)

摘　　要：基于蜂窝结构轴向压缩实验,在显式动力学有限元分析仿真平台,研究单元网格大小以及蜂窝封板连接的不同模拟方法对蜂窝结构轴向吸能特性的影响。研究结果表明:单元网格尺度由2 mm减小到0.5 mm时,蜂窝结构的变形模式与实验结果逐渐吻合,蜂窝结构的平台力、平台强度以及吸能量逐渐收敛,与实验结果相比最大误差分别从30%左右降至1%左右。封板连接方式对蜂窝吸能的平台力、平台力以及吸能量影响较小,对蜂窝结构的变形模式影响更加明显,结点耦合与接触固连方式下蜂窝变形模式相似,胶接方式更符合实际情况。Based on the honeycomb structure axial compression test,using explicit dynamic finite element analysis simulation platform,the effect of grid size and simulation methods for panel connection on the axial energy absorption characteristics of honeycomb structure is studied.The results show that when the grid size of the cell is reduced from2mm to0.5mm,the deformation mode of the honeycomb structure is in agreement with the experimental results gradually,and the platform force,the strength of the platform and the energy absorption of the honeycomb structure is gradually convergent,the maximum error is reduced from30%to about1%compared with the test results.panel connection mode has less influence on the platform force,the strength of the platform and the energy absorption of the honeycomb,the influence of the deformation mode of the honeycomb structure is more obvious.adhesive connection is more suitable for the actual situation.

关 键 词：蜂窝轴向压缩实验 单元尺寸 连接方式 

分 类 号：U270.2[机械工程—车辆工程]