Topology Optimization of Urban Rail Wheel Based on BESO Algorithm

doi:10.3901/JME.2020.10.191

Abstract

Abstract: The structural optimization of urban rail wheels is mostly focused on parameter optimization, and the design space has generally certain limitations. To reduce the structural stress at the plate of urban rail wheels, using bidirectional evolutionary structural optimization algorithm, the topology optimization modeling of straight spoke wheel is carried out. New urban rail wheel plate structure is proposed. The study focuses on the worst-case curve conditions of the urban rail wheels, utilizing 2D topological design of the design domain of the straight plate wheels. Under the constraint of volume, the volume ratio is repeatedly oscillated to achieve better performance optimization indicators by setting the deletion rate, the evolution rate and the increase rate, the stress performance of urban rail wheel can be improved and obtained an excellent topology of the urban rail wheels. By comparing with the calculation results of mature finite element software, the optimized static strength and fatigue strength meet the requirements. It proved the effectiveness and reliability of the bi-directional evolutionary structure optimization algorithm. The research results show that evolutionary structure optimization algorithm is suitable for the optimization design of urban rail wheels. Optimizing the form of the plate of the wheel from a straight plate to a curved plate, and the elements are close to the middle arc, the web has unequal thickness characteristics; Without increasing the weight of the wheel, optimized the maximum structural stress of the wheel at the plate was reduced by 17%. This research has important reference value for improving the structural stress performance of the urban rail wheels.

Key words: urban rail wheel, topology optimization, BESO algorithm, structural stress, straight plate wheels

CLC Number:

U270

WEN Yongpeng, ZHENG Xiaoming, WU Aizhong, LIU Yuejie. Topology Optimization of Urban Rail Wheel Based on BESO Algorithm[J]. Journal of Mechanical Engineering, 2020, 56(10): 191-199.

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