| 考虑UIC强度准则的轨道车轮辐板渐进结构拓扑优化方法 |
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| 引用本文： | 郑晓明,文永蓬,尚慧琳,刘跃杰.考虑UIC强度准则的轨道车轮辐板渐进结构拓扑优化方法[J].交通运输工程学报,2019,19(5):84-95. |
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| 作者姓名： | 郑晓明 文永蓬 尚慧琳 刘跃杰 |
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| 作者单位： | 上海工程技术大学 城市轨道交通学院,上海,201620;上海应用技术大学 机械工程学院,上海,201418 |
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| 基金项目： | 国家自然科学基金项目11472176上海市自然科学基金项目15ZR1419200 |
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| 摘 要： | 为了提高轨道车轮的结构性能, 利用渐进结构拓扑优化方法(ESO)建立了轨道车轮的结构优化模型; 以双S型轨道车轮为设计蓝本, 分析了轨道车轮的辐板设计域, 提出了轨道车轮在多工况作用下的渐进结构拓扑优化方法; 介绍了利用渐进结构拓扑优化方法实现结构应力均匀化的优化思路; 根据《整体车轮技术检验》(UIC 510-5:2003)标准, 分别考虑了轨道车轮在直线工况、曲线工况和道岔通过工况, 不仅获得这3种典型工况共同作用下的拓扑优化结构, 而且还获得了3种典型工况依次作用下的6种拓扑结构; 对比了优化前后车轮辐板的应力, 并利用有限元工具验证了优化后车轮的辐板应力特性, 证明渐进结构拓扑优化方法的正确性和有效性。研究结果表明: 利用渐进结构拓扑优化方法对轨道车轮的拓扑优化是适用的; 在车轮质量不增加的前提下, 优化后车轮辐板的厚度增加且不等厚, 有效地减小应力集中, 降低结构应力; 对比原双S型车轮, 优化后6种车轮模型的结构性能均有所提升, 分别提高了16.6%、20.7%、22.5%、21.3%、20.1%和19.5%, 其中, 方案3的优化车轮在3种工况下辐板处的最大结构应力分别降低了4.0%、14.5%和6.7%。研究有助于轨道车轮结构强度的提高, 并对多工况耦合作用下轨道车轮结构优化具有重要的参考价值。
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| 关 键 词： | 车辆工程 轨道车轮 渐进结构优化 拓扑优化 多工况 结构应力 |
| 收稿时间： | 2019-04-16 |
Evolutionary structure topology optimization method of rail wheel web plate considering UIC strength criterion |
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| ZHENG Xiao-ming,WEN Yong-peng,SHANG Hui-lin,LIU Yue-jie.Evolutionary structure topology optimization method of rail wheel web plate considering UIC strength criterion[J].Journal of Traffic and Transportation Engineering,2019,19(5):84-95. |
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| Authors: | ZHENG Xiao-ming WEN Yong-peng SHANG Hui-lin LIU Yue-jie |
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| Affiliation: | 1.School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620, China2.School of Mechanical Engineering, Shanghai Institute of Technology, Shanghai 201418, China |
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| Abstract: | To improve the structural performance of rail wheels, a structural optimization model of rail wheels was established by using the evolutionary structure topology optimization method. The double S-shaped rail wheel was used as the design blueprint, the design field of rail wheel web plate was analyzed, and the evolutionary structure topology optimization method of the rail wheel web plate was put forward under multi-working conditions. The optimization idea using the evolutionary structure topology optimization method to achieve the structural stress homogenization was introduced. According to the standard Overall Wheel Technical Inspection(UIC 510-5: 2003), considering the rail wheels in linear working condition, curved working condition and passing working condition of ballast, respectively, not only was the topology optimization structure obtained under the joint action of 3 typical working conditions, but also six topology structures were obtained under the action of 3 typical working conditions in turn. The stress conditions of wheel web plate before and after optimization were compared, and the web plate stress features of the optimized wheels were verified by using the finite element tool. The correctness and effectiveness of evolutionary structural topology optimization method were proved. Research result shows that the evolutionary structure topology optimization method is suitable for the topology optimization of rail wheels. Under the premise that the wheel weight does not increase, the thickness of wheel web plate increases and is unequal, the stress concentration reduces effectively, and the structural stress reduces. Compared with the original double S-shaped wheels, the structural performances of the optimized six wheel models improve by 16.6%, 20.7%, 22.5%, 21.3%, 20.1%, and 19.5%, respectively. The maximum structural stresses of the optimized wheel web plates of scheme 3 reduce by 4.0%, 14.5%, and 6.7% under 3 working conditions, respectively. The research contributes to the improvement of structural strength of the rail wheels, and has important reference value for the optimization of rail wheel structure under the multi-working coupling condition. |
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