摘要
采用LS-DYNA仿真软件对新型薄壁管在轴向冲击荷载作用下进行了数值模拟,分析了上端薄壁圆管长度和波纹型诱导槽半径对其耐撞性及变形模式的影响,并与普通薄壁圆管进行比较。结果表明:当上端薄壁圆管长度及波纹形诱导槽半径设计合理时,新型薄壁管在压溃阶段的最大峰值压溃力、比吸能以及变形模式相比于普通薄壁圆管更优异。为了获得更好吸能效果的新型薄壁管,以其比吸能和最大峰值压溃力为优化指标,以上端薄壁圆管长度和波纹形诱导槽半径为动态变量,建立了新型薄壁管多目标优化方案。基于Kriging法构造了目标近似函数,同时结合NSGA-Ⅱ算法求解了多目标优化问题。
Numerical simulation of the new thin-walled tube under the axial impact load was obtained by using LS-DYNA.The effects of the length of the upper thin-walled circular tube and the radius of the corrugated inducing groove on its crashworthiness and deformation mode were analyzed,and compared with the ordinary thin-walled circular tube.The results show that when the length of the upper thin-walled circular tube and the radius of the corrugated inducing groove are designed reasonably,the maximum peak crushing force,specific energy absorption and deformation mode of the new thin-walled tube in the crushing stage are superior to those the ordinary thin-walled circular tube.In order to obtain the new thin-walled tube with a better energy absorption effect,a multi-objective optimization scheme was built by using specific energy absorption and the maximum peak crushing force as optimization indicators,and the length of the upper thinwalled circular tube and the radius of the corrugated inducing groove as variables.The objective approximate functions were constructed based on the Kriging method,and the NSGA-Ⅱalgorithm was used to solve the multi-objective optimization problem.
作者
尹华伟
王陈凌
段金曦
刘利民
YIN Huawei;WANG Chenling;DUAN Jinxi;LIU Limin(College of Civil Engineering,Hunan University,Changsha 410082,Hunan,China;Civil Engineering Inspection and Test Limited Company of Hunan University,Changsha 410082,Hunan,China;College of Basic Education,National University of Defense Technology,Changsha 410072,Hunan,China;Hunan Zetian Sensing Technology Co.,Ltd.,Changsha 410131,Hunan,China)
出处
《高压物理学报》
CAS
CSCD
北大核心
2021年第3期98-108,共11页
Chinese Journal of High Pressure Physics
基金
国家重点研发计划(2016YFC0701405)。
