铁道科学与工程学报2024，Vol.21Issue(4)：1677-1689,13.DOI:10.19713/j.cnki.43-1423/u.T20230638
过盈配合工况下收缩管吸能特性分析及结构参数优化
Analysis of energy absorption characteristics of shrink tube and optimization of structural parameters under interference fit condition
摘要
Abstract
The energy-absorbing characteristics of rail vehicle shrink tubes under axial impact load and interference fit are important topics in the research of energy-absorbing structures.The energy absorption process was realized by the friction between them and the plastic deformation of the shrink tube.The interference fit improved the energy dissipation of the shrink tube by influencing the contact force.In order to improve the energy absorption characteristics of the shrink tube,the influence of the interference fit was studied.The optimal structural parameters of the shrink tube,including the interference amount,were obtained based on a multi-objective optimization algorithm using a combination of experiments and finite element models.First,the static pressure test of the interference fit between the hollow shaft and the sleeve was carried out to verify the correctness of the theoretical formula.Afterwards,the trolley impact test was used to study the energy absorption characteristics of the shrink tube,and finite element model was constructed for verification.The theoretical model of the shrink tube contact pressure under interference fit was deduced.Then,the full factorial and Hammersley design methods were used to study structural variables,including thickness(T),interference(Intf),taper angle long side(αx),and shrink ratio(Ratio).Based on above results,approximate models of peak force(PCF),specific energy absorption(SEA)and mean force(MCF)were constructed using moving least squares method(MLSM).The main effect analysis showed that the shrink ratio had the most significant influence on PCF,SEA and MCF.To obtain the minimum PCF,the maximum SEA and the MCF closest to the design requirement of 650 kN as the optimization goal,the global response surface method(GRSM)was used for optimization.Finally,the optimal configuration was obtained.Compared with the initial design,the SEA increased by 28.54%,and the PCF decreased by 12.37%.The error between the MCF obtained from the surrogate model and the finite element model is 2.01%,which proves that the surrogate model constructed has high precision and can be used for optimization calculations.The optimized structure effectively improves the energy absorption capacity of the shrinkable tube and reduces the initial peak force of the collision.关键词
收缩管/过盈配合/耐撞性设计/结构参数分析/多目标优化Key words
shrink tubes/interference fit/crashworthiness design/structural parameter analysis/multi-objective optimization分类
交通工程引用本文复制引用
许平,杨雨晖,阳程星,邢杰,姚曙光,邹帆..过盈配合工况下收缩管吸能特性分析及结构参数优化[J].铁道科学与工程学报,2024,21(4):1677-1689,13.基金项目
国家重点研发计划"揭榜挂帅"项目(2021YFB3703801) （2021YFB3703801）
湖南省自然科学基金资助项目(2022JJ40619,2023JJ20074) （2022JJ40619,2023JJ20074）
长沙市自然科学基金资助项目(kq2202102) （kq2202102）
湖南省科技领军人才计划(2019RS3018) （2019RS3018）
中国科协青年人才托举工程(2022QNRC001) （2022QNRC001）
