首页|轮轨激励与气动载荷对高速列车转向架结构载荷的分量贡献研究

轮轨激励与气动载荷对高速列车转向架结构载荷的分量贡献研究

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准确认知高速列车的结构载荷来源是开展疲劳可靠性设计的基础，本文聚焦于厘清高速列车转向架结构载荷中来自轮轨激励与气动作用的分量贡献。首先通过气动-多体动力学耦合计算，得到了单列车明线运行和单列车通过隧道工况不同外载作用下的高速列车转向架结构载荷，进而通过计算不同外载作用下的结构载荷特征差异分析了外部载荷等因素对结构载荷特征的影响。研究表明来自轮轨的激励是决定转向架结构载荷幅值的主因，而气动载荷是引起结构载荷均值变化的关键。本文进一步通过信号分析理论中的时域贡献网络求解方法量化了不同载荷来源对结构载荷的分量贡献，发现轮轨激励在明线和隧道工况下都是转向架结构载荷的主要分量贡献;同时也注意到隧道工况下，气动载荷对结构载荷的贡献显著上升。本文厘清了不同载荷来源在两种工况下对结构载荷的影响，相关结论可为高速列车关键结构的抗疲劳设计提供依据。
Fractional load contributions from wheel-rail excitations and aero-dynamics to the high-speed train bogie structure
Understanding the structural load sources of high-speed trains(HSTs)precisely is critical for their fatigue reliability design.In this paper,we identify fractional load contributions from wheel-rail excitations and aerodynamics to the HST bogie structure.To this end,we first determine the structural loads on the bogies of an HST subjected to various external loads under two conditions—single-train operating in the open air and passing through a tunnel—using coupled aerodynamics and multibody dynamics calculations.Further,we analyze the influence of external loads and other factors on the structural load characteristics for calculating the differences in the structural load characteristics under various external loads.This study shows that wheel-rail excitation is the dominant factor determining the amplitude of the structural loads on bogies,while aerodynamic load is the primary factor responsible for changing the mean values of the structural loads.Additionally,we quantify the fractional contributions of different load sources to the structural loads using the network method of time-domain contribution by solving the signal analysis theory and demonstrate that the fractional contribution of the wheel-rail excitation to the structural loads on bogies under open air and tunnel conditions is the most dominant.Furthermore,contributions of the aerodynamic loads to the structural loads increase considerably under the tunnel condition.This paper clarifies the influence of different load sources on the structural loads under two working conditions,and the findings may provide a foundation for designing fatigue-resistant critical structures of HSTs.

high-speed train bogiefractional load contributionswheel-rail excitationaerodynamic loadcoupled aerodynamics and multi-body dynamics

袁征、陈贤佳、纪占玲、李岑、罗为、李强、孙守光、杨国伟、魏宇杰

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北京交通大学机械与电子控制工程学院,北京 100044

中国科学院力学研究所非线性力学国家重点实验室,北京 100190

中国科学院力学研究所流固耦合系统力学重点实验室,北京 100190

中国铁道科学院集团有限公司机车车辆研究所,北京 100081

北京交通大学智慧高铁系统前沿科学中心,北京 100044

中国科学院大学工程科学学院,北京 100049

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高速列车转向架 结构载荷分量贡献 轮轨激励 气动载荷 气动-多体动力学耦合

中央高校基本科研业务费专项资金科技领军人才团队项目国家自然科学基金基础科学中心项目

2022JBQY00711988102

2024

10.1360/SST-2023-0165

中国科学(技术科学)
中国科学院

中国科学(技术科学)

CSTPCD北大核心
影响因子：0.752
ISSN：1674-7259
年,卷(期)：2024.54(6)
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