摘要
建立模拟高速磁浮列车泡沫三明治裙板冲击的有限元模型,基于搭建的钢球冲击试验装置验证模型的有效性,研究冲击速度、前后金属面板厚度和支撑间距对泡沫三明治板吸能量和冲击载荷的影响。采用响应面法建立泡沫三明治板内能和初始峰值载荷的代理模型,基于遗传算法提出冲击速度、前后面板厚度和支撑间距等参数的优化方法。研究结果表明:在低速(8 m/s)冲击下,泡沫三明治板具有更好的吸能效率,吸能效率能达到90%以上;随着冲击速度增加,吸能效率显著下降;增加冲击间距不仅能延长冲击作用时间,也能显著降低冲击载荷峰值力,降幅达到13.59%;针对高速磁浮列车泡沫三明治板的吸能设计要求,通过调整前、后金属面板的厚度可有效改善其吸能效果。内能和峰值力的预测值与其真实值之间的最大相对误差分别为4.14%和0.96%,满足高速磁浮列车泡沫三明治板吸能特性预测的精度要求。
A finite element model was proposed to simulate the impact of foam sandwich skirt plate of high-speed maglev train.Based on the steel ball impact test device,the effectiveness of the model was verified.The effects of impact velocity,front and rear metal panel thickness and support spacing on the energy absorption and impact load of foam sandwich plate were studied.The response surface method was used to establish the surrogate model of internal energy and initial peak load of the foam sandwich plate,and the optimization model of impact velocity,front and rear panel thickness and support spacing was established based on genetic algorithm.The results show that under the low speed(8 m/s)impact,the foam sandwich board has a better energy absorption efficiency,which can reach more than 90%,and the energy absorption efficiency decreases significantly with the increase of impact speed.The increase in impact spacing not only prolongs the impact time,but also significantly reduces the peak impact force,which can be reduced by 13.59%.Aiming at the design of the foam sandwich plate of high-speed maglev train,the energy absorption effect can be effectively improved by adjusting the thickness of the front and rear metal panels.The maximum relative error between the predicted value of internal energy and peak force are 4.14%and 0.96%,respectively.The accuracy of energy absorption characteristics prediction of foam sandwich plate of high-speed maglev train is satisfied.
作者
李玉如
谢君科
肖守讷
朱涛
周刚剑
张昊
李向伟
LI Yuru;XIE Junke;XIAO Shoune;ZHU Tao;ZHOU Gangjian;ZHANG Hao;LI Xiangwei(College of Vehicle and Traffic Engineering,Henan University of Science and Technology,Luoyang 471003,China;State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031,China;CRRC Qiqihar Rolling Stock Co.Ltd.,Qiqihaer 161000,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2024年第5期2011-2022,共12页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(52175123,52172409)
四川省杰出青年基金资助项目(2022JDJQ002)
河南省重点研发与推广专项资助项目(232102240092)
黑龙江省博士后基金资助项目(LBH-Z23041)
2023原创技术十年培育专项项目(2022CYY007)。
关键词
高速磁浮列车
泡沫三明治板
有限元模型
代理模型
吸能特性预测
high-speed maglev train
foam sandwich plate
finite element model
surrogate model
energy absorption characteristic prediction
