摘要
为提升防撞柱结构的耐撞性,基于拓扑优化方法得到防撞柱在多工况下的最优截面构型,并在显式动力学软件Ls-Dyna中建立其冲击有限元模型。利用最优拉丁超立方实验设计方法,构建了多胞防撞柱的比吸能与峰值力关于截面壁厚的多项式响应面代理模型,采用第二代非劣排序遗传算法对多目标优化问题进行了寻优计算,得到其Pareto前沿解集。优化结果表明:优化后的新型多胞防撞柱较传统单胞结构在满足轻量化要求的同时,其吸能量与比吸能均有显著提升。
In order to improve the crashworthiness of the collision post structure,the optimal cross-section configuration of the collision post was obtained based on the topology optimization method,and the impacting finite element model of the collision post was established in the explicit dynamics software Ls-Dyna.Based on the optimal Latin hypercube experimental design method,a polynomial response surface surrogate model of the specific energy absorption and the peak crush force with respect to the wall thickness of the novel multi-cell collision post was established,the multi-objective optimization problem was conducted using the Non-dominated Sorting Genetic Algorithm-Ⅱand the Pareto front was obtained.The optimization results show that the total energy and specific energy absorption of the novel multi-cell collision post are improved significantly while meeting the structural lightweight requirements compared with the conventional single-cell structure.
作者
石越卿
秦睿贤
陈秉智
SHI YueQing;QIN RuiXian;CHEN BingZhi(School of Locomotive and Rolling Stock Engineering,Dalian Jiaotong University,Dalian 116028,China;R&D Center,CRRC Tangshan Co.,Ltd.,Tangshan 064000,China)
出处
《机械强度》
CAS
CSCD
北大核心
2022年第5期1134-1140,共7页
Journal of Mechanical Strength
基金
大连市科技创新基金计划(2019J11CY017)
中国国家铁路集团科技研究计划(N2020J027)资助。
关键词
轨道车辆
防撞柱
耐撞性
拓扑优化
多目标优化
Railway vehicles
Collision post
Crashworthiness
Topology optimization
Multi-objective optimization