QIU Xinyu,LI Yana,LIU Xingyu. Study on secondary optimization of metro aluminum alloy car body based on stiffness contribution[J]. Journal of Mechanical Strength,2025,47(11):128-134.
QIU Xinyu,LI Yana,LIU Xingyu. Study on secondary optimization of metro aluminum alloy car body based on stiffness contribution[J]. Journal of Mechanical Strength,2025,47(11):128-134. DOI: 10.16579/j.issn.1001.9669.2025.11.015.
STUDY ON SECONDARY OPTIMIZATION OF METRO ALUMINUM ALLOY CAR BODY BASED ON STIFFNESS CONTRIBUTION
In the screening of optimization design regions for subway car body structures
the sensitivity method is often used; however
its operation process is complex and cumbersome
and it cannot be quickly applied to the design of car body structures. To address this issue
based on the stiffness contribution theory and on the premise that the accuracy of the finite element model was verified through experiments
the local stiffness and global stiffness of the aluminum alloy subway car body were combined to quickly determine the main optimization regions of the car body. A method integrating topology optimization and size optimization was adopted to conduct a secondary optimization design study on the car body structure. The structural performance of the optimized car body fully complied with the EN 12663 standard: the mass of the optimized car body was reduced by 5.34%
the 1st-order vertical bending frequency was increased by 16%
and other modal frequencies were also significantly improved. This optimization provides a technical reference for the optimization design of other subway car body structures.
ZHANG Lei , XU Shuaikang , CHEN Jie , et al . Research progress in lightweight design of train body [J]. Journal of Mechanical Engineering , 2023 , 59 ( 24 ): 177 - 196 . (In Chinese)
MALZACHER G , TAKAGAKI M , GOMESALVES C . Methodical development of a lightweight car body for a high-speed train [C]// World Congress on Railway Research , University of Birmingham . Birmingham : WCRR , 2022 : 17 - 23 .
SONG Yuhao , SUN Liping , WANG Yuyan . Topologic optimization of the cross section of the hollow aluminum alloy of an urban rapid rail car roof [J]. Modern Machinery , 2022 ( 1 ): 40 - 43 . (In Chinese)
LIU C Y , MA K , ZHU T , et al . A new car-body structure design for high-speed EMUs based on the topology optimization method [J]. Applied Sciences , 2024 , 14 ( 3 ): 1074 .
HUANG Dawei , GUO Chengrong , FU Aijun , et al . Optimization design of the carriage frame of a livestock and poultry transport vehicle based on multiple working conditions [J]. Journal of Chinese Agricultural Mechanization , 2023 , 44 ( 10 ): 137 - 143 . (In Chinese)
CASCINO A , MELI E , RINDI A . Dynamic size optimization approach to support railway carbody lightweight design process [J]. Proceedings of the Institution of Mechanical Engineers ,Part F:Journal of Rail and Rapid Transit, 2022 , 237 ( 7 ): 871 - 881 .
BAI Yuyu . Optimization research of the head car body structure of 160 km/h urban express rail vehicle [D]. Dalian : Dalian Jiaotong University , 2023 : 41 - 47 . (In Chinese)
YU Yang . Research on application for topology optimization of high-speed train carbody section profiles [D]. Changsha : Central South University , 2022 : 39 - 50 . (In Chinese)
NA Jingxin , YUAN Zheng , HE Wuyang , et al . An evaluation method for the degree of contribution of local modules to vehicle body stiffness [J]. Automotive Engineering , 2016 , 38 ( 10 ): 1274 - 1277 . (In Chinese)
YAO Cheng . Research on the improvement and application of the evaluation method for local structural stiffness contribution of bus body [D]. Changchun : Jilin University , 2018 : 14 - 25 . (In Chinese)
TIAN Yongkang , GONG Yunxi , ZOU Ping , et al . Sensitivity analysis and multi-objective lightweight design of an automobile sliding door [J]. Journal of Mechanical Strength , 2024 , 46 ( 1 ): 122 - 128 . (In Chinese)
WANG Suoguo , SHEN Jinghu , SHI Le . Lightweight design of a small family car disc brake based on ANSYS [J]. Journal of Mechanical Strength , 2023 , 45 ( 1 ): 98 - 104 . (In Chinese)
JI Ning , ZHANG Weixing , YU Yangyang , et al . Multi-objective optimization of injection molding based on optimal Latin hypercube sampling method and NSGA-Ⅱ algorithm [J]. Engineering Plastics Application , 2020 , 48 ( 3 ): 72 - 77 . (In Chinese)
ZHOU S Q , ZHANG T L , MAO Z J , et al . Multi-objective optimization of an IGV for a large axial fan based on NSGA-II [J]. Frontiers in Energy Research , 2022 , 10 : 994654 .