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Multi-objective optimization design of motor train unit truck frame based on hybrid addition Kriging surrogate model
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Weiqi WANG, Yubo SONG, Ying WANG
Journal of Mechanical Strength | 2025, 47(10) : 139 - 147
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Journal of Mechanical Strength | 2025, 47(10): 139-147
• Experimental Research·Testing Technology •
Multi-objective optimization design of motor train unit truck frame based on hybrid addition Kriging surrogate model
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Weiqi WANG, Yubo SONG, Ying WANG
Affiliations
  • Mechatronics T&R Institute, Lanzhou Jiaotong University, Lanzhou 730070, China
Published: 2025-10-15 doi: 10.16579/j.issn.1001.9669.2025.10.016
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To enhance the computational efficiency of structural lightweight design for complex structures, a structural lightweight design method based on the Kriging surrogate model is proposed. The proposed method incorporates a hybrid addition strategy and a sample deletion strategy considering a distance threshold，aiming to rapidly improve the fitting accuracy of the Kriging surrogate model. This model was then applied to a multi-objective lightweight design model of the truck frame, with the optimization objectives of minimizing frame mass and maximum stress. Subsequently, the multi-objective lightweight model was solved using the non-dominated sorting genetic algorithm-II (NSGA-II). The results demonstrate that the proposed hybrid addition strategy and sample deletion strategy considering the distance threshold effectively enhance the update process of the Kriging surrogate model. The structural lightweight design method based on the Kriging surrogate model exhibits significant advantages in both computational efficiency and lightweight performance.

Structural lightweight  /  Truck frame  /  Kriging surrogate model  /  Hybrid addition strategy
Weiqi WANG, Yubo SONG, Ying WANG. Multi-objective optimization design of motor train unit truck frame based on hybrid addition Kriging surrogate model[J]. Journal of Mechanical Strength, 2025 , 47 (10) : 139 -147 . DOI: 10.16579/j.issn.1001.9669.2025.10.016
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Year 2025 volume 47 Issue 10
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Article Info
doi: 10.16579/j.issn.1001.9669.2025.10.016
  • Receive Date：2023-11-26
  • Online Date：2026-02-11
  • Published：2025-10-15
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  • Received：2023-11-26
Affiliations
    Mechatronics T&R Institute, Lanzhou Jiaotong University, Lanzhou 730070, China

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SONG Yubo, E-mail:
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小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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