| 轨道结构随机场模型与车辆-轨道耦合随机动力分析 |
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| 引用本文： | 徐磊,翟婉明. 轨道结构随机场模型与车辆-轨道耦合随机动力分析[J]. 应用数学和力学, 2017, 38(1): 67-74. DOI: 10.21656/1000-0887.370370 |
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| 作者姓名： | 徐磊 翟婉明 |
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| 作者单位： | 牵引动力国家重点实验室(西南交通大学), 成都 610031 |
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| 基金项目： | 国家重点基础研究发展计划（973计划）（2013CB036205； 2013CB036206）；国家自然科学基金（高铁联合基金）（U1234209）；中央高校基本科研业务费专项资金资助（2682015CX045）；国家自然科学基金（51478482;51678507） |
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| 摘 要： | 将轨道结构视为一个参数随机系统，提出并建立了轨道结构的随机场模型.利用车辆-轨道耦合动力学的基本方法，将轨道系统有限单元模型与多刚体车辆模型相结合，建立了考虑铁路线路参数空-时随机变化的车辆-轨道动力计算模型.算例表明:所提出的方法较为可靠且高效；线路参数随机性对车辆-轨道系统的动力响应有明显的影响，随线路参数离散程度的增加，可能造成行车不安全、轨道损伤加剧等一些问题.
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| 关 键 词： | 轨道结构 随机场 车辆-轨道耦合动力学 随机振动 |
| 收稿时间： | 2016-12-03 |
The Random Field Model for Track Structures and Vehicle-Track Coupled Stochastic Dynamic Analysis |
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| Affiliation: | State Key Laboratory of Traction Power(Southwest Jiaotong University), Chengdu 610031, P.R.China |
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| Abstract: | In view of the track structure as a system with stochastic parameters, the random field model for railway track systems was proposed and constructed. Then the finite element model for the track system and the multi-rigid-body model for the vehicle system were coupled based on the fundamental principle of vehicle-track coupled dynamics to establish the vehicle-track stochastic analysis model in which the temporal-spatial random variances of rail line parameters were taken into consideration. The numerical examples show that the proposed methods are reliable and efficient, and the randomnesses of railway line parameters have significant influences on dynamic responses of railway vehicle-track systems: for example, running insecurity of vehicles and damage aggravation of track structures may grow with the increases of variances of track structure parameters. |
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