Study on Relationship between Operating Modal and Shoulder Wear of Straddle-type Monorail Running Wheel Tires
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摘要: 跨座式单轨列车在重庆推广运营过程中出现了严重的偏磨损现象并引发一系列安全、环境、运行成本等问题。为探索其偏磨机理及控制方法,采用ABAQUS软件建立了走行轮轮胎的有限元模型,通过轮胎模态试验验证了其建模方法的有效性,并基于行波理论,利用有限元方法计算了考虑走行轮轮胎滚动效应的工作模态,同时探索了走行轮轮胎工作模态与偏磨的关联关系。并根据轮胎结构与模态的内在关系,提出了通过改变轮胎结构参数来控制走行轮轮胎偏磨的控制方法。分析结果表明:通过合理改变0°带束层弹性模量可以降低走行轮一阶扭转前后行波差,有效降低跨座式单轨走行轮的偏磨。Abstract: Due to the severe shoulder wear and tear during the operation of Chongqing straddle monorail train, a series of security, environmental and economy problems were aroused. In this paper, to explore the mechanism of the shoulder wear, a finite element model of the running wheel tire was built with ABAQUS software, and the validity of the modeling method was verified by tire modal test. The relationship between operating modes of running wheel tire and its shoulder wear was investigated based on the finite element model. According to the relationship between tire structure and vibration mode, a method of controlling tire deviation of running wheel by modifying tire's structural parameters was put forward. The analysis results showed that the difference between forward and backward traveling waves of the running wheel tire could be reduced by changing the elastic modulus of tire's zero-degree band beam reasonably, and the shoulder wear of the straddle monorail wheel can be effectively reduced.
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Key words:
- straddle-type monorail train /
- tire /
- operating modal /
- mechanism of shoulder wear /
- ABAQUS /
- vibration mode
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表 1 自由模态试验与仿真结果对比
阶次 1 2 3 4 5 一阶扭转 试验值/Hz 60.9 98.1 119.9 146.2 176.6 59.4 仿真值/Hz 67.4 91.7 114.2 137.6 161.7 62.7 误差/% 10.2 6.5 4.7 5.8 8.4 5.5 表 2 约束模态试验与仿真结果对比
阶次 1 2 3 4 5 一阶扭转 试验值/Hz 58.3 90.6 117.6 145.1 174.5 51.8 仿真值/Hz 64.9 89.8 115.4 139.6 163.9 55.9 误差/% 11.4 1.0 1.9 3.8 6.1 8.0 表 3 走行轮轮胎约束模态仿真结果
阶次 1 2 3 4 5 一阶扭转 仿真值/Hz 49.6 67.1 80.8 94.1 116.2 32.2 表 4 外侧走行轮轮胎一阶扭转频率计算结果
Hz 车速 37 975 N 48 510 N 54 880 N 自由状态 32.217 32.217 32.217 20 km/h 30.35 34.32 30.52 34.81 30.62 34.99 30 km/h 30.17 34.57 30.32 35.07 30.41 35.28 43 km/h 29.91 34.99 30.02 35.54 30.03 35.71 表 5 弹性模量对走行轮轮胎模态频率的影响
弹性模量 扭转一阶(自由) 扭转一阶(滚动) 前后行波之差/Hz 摩擦功偏度值 前行波/Hz 后行波/Hz 胎面橡胶弹性剪切模量E0 1.2 MPa 31.356 28.054 35.269 7.215 24.452 5.4 MPa 31.841 28.453 35.863 7.41 26.123 9.8 MPa 32.217 28.763 36.184 7.421 29.493 14.3 MPa 32.523 28.964 36.314 7.35 32.912 18.9 MPa 32.912 29.265 36.631 7.366 34.25 0°带束层钢丝帘线E1 48.6 GPa 30.634 29.197 35.612 6.415 20.654 51.3 GPa 31.021 29.064 35.852 6.788 27.865 53.7 GPa 32.217 28.763 36.184 7.421 29.493 61.7 GPa 34.613 27.862 37.125 9.263 33.212 68.4 GPa 35.345 27.274 37.562 10.288 36.452 1号和2号带束层钢丝帘线E2 119 GPa 32.217 28.763 36.184 7.421 29.493 124 GPa 32.464 28.914 36.295 7.381 30.124 130 GPa 32.709 29.197 36.365 7.168 31.21 136 GPa 32.951 29.381 36.452 7.071 32..765 142 GPa 33.225 29.402 36.471 7.069 32.807 -
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