Research on multidisciplinary fatigue optimization design method in structural design of high speed train

Miao, Bing Rong; Luo, Yan; Qiu, Yu; Peng, Qihui; Jiang, Chaoyang; Yang, Zhe

doi:10.1016/j.prostr.2020.01.014

Cited by 6 publications

(1 citation statement)

References 11 publications

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“…Sun et al and Hudson et al [20,21] studied the optimization method of carbody parameters considering multiple factors. Sun et al [22] optimized the modal frequency of the railway vehicle carbody based on SA. Miao et al [23] used the ant colony algorithm to optimize the composite sandwich structure of the bottom cover.…”

Section: Introductionmentioning

confidence: 99%

Research on Optimization of Structural Parameters of Equipment Cabin Bottom Cover

Zou

Zhang

2022

Mathematical Problems in Engineering

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Since the railway vehicle structure has lots of parameters and several complex constraints, this study establishes a method for structural parameter optimization based on sensitivity analysis and surrogate models. Fatigue crack problem of the equipment cabin bottom cover of the EMU is taken as an example to optimize its structural parameters. First, establish the finite element (FE) model of the bottom cover and compare it with the bench test results to verify the accuracy of the load and restraint conditions. The sensitivity analysis method is used to determine the main parameters. The input samples are obtained by Latin hypercube sampling method, and the output samples are obtained by the method jointly developed by ABAQUS+Python and the surrogate model between the input and output samples is obtained by fitting, and its accuracy is verified. According to the design requirements, the optimization objective function and constraint conditions are established, and the optimization result is obtained by optimization algorithm. The results were substituted into the FE model for verification. The results show that the maximum equivalent stress of the bottom cover is reduced from 126.7 MPa to 78.9 MPa under a cyclic aerodynamic load of ±4 kPa, which is 37.7% optimized, and the effect is significant. This method avoids the iterative optimization of the FE model and improves the optimization efficiency.

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Section: Introductionmentioning

confidence: 99%

Research on Optimization of Structural Parameters of Equipment Cabin Bottom Cover

Zou

Zhang

2022

Mathematical Problems in Engineering

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Research on the fatigue performance of self-compacting concrete structure in CRTSIII slab ballastless track under the action of heavy haul train

Zeng

Huang

Yan

et al. 2021

Construction and Building Materials

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Structural optimization of the heavy haul wagon body based on MPSO-BP algorithm

Liu

Yong-ju

Liu

et al. 2021

Trans. Can. Soc. Mech. Eng.

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Fatigue cracks usually occur at welded joints of heavy haul wagon body, in order to effectively curb the occurrence of such problems from the design stage, it is researched from structural design strategy to structural optimization method in this paper. Firstly, when analyzing the finite element simulation results, the new structural design strategy not only pays attention to the maximum stress which can reflect the stress concentration position, but also focuses on the stress distributions at the key welded joints. Secondly, in order to further reduce the stress at the key positions, the paper gives the optimization method which integrates orthogonal experimental design, BP network and MPSO algorithm. Finally, 80t gondola car body is optimized from the whole structure to the local area by the method. Meanwhile, it is also verified that the structural optimization method of heavy haul wagon body is reasonable and feasible.

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Research on multidisciplinary fatigue optimization design method in structural design of high speed train

Cited by 6 publications

References 11 publications

Research on Optimization of Structural Parameters of Equipment Cabin Bottom Cover

Research on Optimization of Structural Parameters of Equipment Cabin Bottom Cover

Research on the fatigue performance of self-compacting concrete structure in CRTSIII slab ballastless track under the action of heavy haul train

Structural optimization of the heavy haul wagon body based on MPSO-BP algorithm

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