考虑尖轨变截面廓形的轮轨接触与磨耗分析

陈雨; 安博洋; 潘自立; 莫宏愿; 王平; 方嘉晟; 钱瑶; 徐井芒

doi:10.3969/j.issn.0258-2724.20210040

考虑尖轨变截面廓形的轮轨接触与磨耗分析

doi: 10.3969/j.issn.0258-2724.20210040

陈雨^{1, 2,},
安博洋^{1, 2, ,},
潘自立³,
莫宏愿³,
王平^{1, 2},
方嘉晟^{1, 2},
钱瑶^{1, 2},
徐井芒^{1, 2}

1.
西南交通大学高速铁路线路工程教育部重点实验室，四川成都 610031
2.
西南交通大学土木工程学院，四川成都 610031
3.
中铁二院工程集团有限责任公司，四川成都 610031

基金项目: 国家自然科学基金（U1734207, 51978586, 51908474）；四川省重点研发计划（2019YFG0460）；中央高校基本科研业务费（2682020CX67）；中铁二院工程集团有限责任公司科技开发计划（KNSQ202054)

详细信息

作者简介:
陈雨（1997—），女，博士研究生，研究方向轮轨关系与轮轨损伤分析，E-mail：291035338@qq.com

通讯作者:
安博洋（1988—），男，讲师，博士，研究方向轮轨接触动力学与伤损，E-mail：anboyang@swjtu.edu.cn

中图分类号: U211.5
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- 被引次数: 0
出版历程
- 收稿日期: 2021-01-19
- 修回日期: 2021-04-05
- 网络出版日期: 2022-07-15
- 刊出日期: 2021-04-08

Analysis of Wheel-Rail Contact and Wear Considering Variable Cross-Sections of Switch Rail

CHEN Yu^{1, 2
,},
AN Boyang^{1, 2
, ,},
PAN Zili³,
MO Hongyuan³,
WANG Ping^{1, 2},
FANG Jiasheng^{1, 2},
QIAN Yao^{1, 2},
XU Jingmang^{1, 2}

1.
MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China
2.
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
3.
China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

摘要

摘要:
为研究尖轨变截面对曲尖轨轮轨接触行为和磨耗分布的影响，提出了一种适用于道岔区的三维非对称接触几何算法，该算法可计算车轮与曲尖轨间的真实法向间隙. 使用SIMPACK建立车辆-道岔多体动力学模型，获得仿真结果；利用考虑变截面的接触模型与英国谢菲尔大学提出的USFD磨耗模型计算曲尖轨磨耗. 研究结果表明：1）以S1002CN车轮与12号道岔曲尖轨为例，轮对摇头角与尖轨变截面均会引起轮轨法向间隙沿接触斑纵向非对称分布，从而导致接触斑形状与应力沿接触斑纵向非对称分布；当摇头角为10 mrad，横移量为7.5 mm时，本文算法得到的接触斑面积比未考虑尖轨变截面和摇头角的简化算法所得结果大9.2%. 2）以CRH3型车与12号曲尖轨道岔为研究对象，简化算法得到的最大磨耗深度为本文算法所得结果的0.75倍.
- 铁路道岔 /
- 尖轨磨耗 /
- 轮轨接触 /
- 变截面 /
- 摇头角
Abstract:
To investigate the influence of variable switch rail cross-sections on wheel-rail contact behaviors and the wear distribution of the curved switch rail, a three dimensional (3D) asymmetric contact geometry method for the turnout area was proposed, which could calculate the real normal gap between the wheel and curved switch rail. The vehicle-turnout multi-body dynamics model was initially built by SIMPACK to obtain simulated results. And then the wear depth of the curved switch rail was calculated by the contact model considering variable cross-sections and the USFD wear model proposed by University of Sheffield. The results show that: 1) Taking the S1002CN wheel profile and No. 12 curved switch rail for examples, both the wheel-set yaw angle and variable cross-sections result in the asymmetric distribution of wheel-rail normal gap along the longitudinal direction within the contact patch. Therefore, the normal gap causes the contact patch shape and stress distribution asymmetric along the longitudinal direction within the contact patch. When the wheel-set yaw angle is 10 mrad and the lateral displacement is 7.5 mm, the area of contact patch obtained by the proposed method is 9.2% larger than that solved by the simplified method without considering the variable cross-sections and yaw angle. 2) Taking the CRH3 vehicle and No.12 curved switch blades as the research objects, the maximum wear depth calculated by the simplified method is 0.75 times as large as that according to the proposed method.
- railway turnout /
- switch rail wear /
- wheel-rail contact /
- variable cross-sections /
- yaw angle

HTML全文

图 1 接触点局部坐标

Figure 1. Wheel-rail contact coordinate system

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图 2 精确算法求解轮轨接触点示意

Figure 2. Schematic diagram of the exact method for determining the wheel-rail contact point

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图 3 不同横移量下的接触点位置

Figure 3. Positions of the contact points under different lateral displacements

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图 4 接触斑轮廓对比

Figure 4. Comparison of contact patch contour

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图 5 横移量为7.5 mm时接触斑内法向应力

Figure 5. Pressure distribution within contact patch at a lateral displacement of 7.5 mm

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图 6 尖轨磨耗量分布

Figure 6. Distribution of wear depth on the switch panel

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图 7 不同车轮与曲尖轨接触时的接触点纵坐标与接触斑面积

Figure 7. Longitudinal coordinates of the contact point and contact areas between different wheelsets and the curved switch rail

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图 8 钢轨截面磨耗深度分布

Figure 8. Wear depth on the switch rail cross-section

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图 9 两种算法得到的切应力分布

Figure 9. Distribution of tangential stress solved by the two methods

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图 10 切应力沿Y_c和X_c方向分布

Figure 10. Distribution of tangential stress along Y_c-direction and X_c-direction

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