| 高速铁路接触网腕臂系统的力学特性 |
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| 引用本文： | 张静,刘金增,刘志刚,储文平.高速铁路接触网腕臂系统的力学特性[J].西南交通大学学报,2021,56(2):347-353. |
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| 作者姓名： | 张静 刘金增 刘志刚 储文平 |
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| 基金项目： | 国家自然科学基金（51405401，U1434203，U1734202） |
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| 摘 要： | 为了解决高速铁路接触网腕臂疲劳裂纹及零部件脱落的难题进行了腕臂系统的力学特性研究. 建立了腕臂的实体有限元模型，研究了腕臂系统在风环境和覆冰影响下的静力学特性；采用模态分析，获得腕臂的固有频率和振型；基于变形方程，推导出腕臂系统载荷的传递函数，获得了腕臂上载荷的分布规律；通过台架试验验证了腕臂实体有限元模型的正确性. 研究结果表明:腕臂系统的最大位移均在定位线夹处；当覆冰载荷作用时，腕臂系统的最大应力点在斜腕臂和套管双耳连接的螺栓处；当静风荷载作用时，腕臂系统的最大应力点在定位线夹处.
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| 关 键 词： | 腕臂系统 有限元法 模态分析 传递规律 台架试验 |
| 收稿时间： | 2019-01-09 |
Mechanical Characteristics of High-Speed Railway Catenary Cantilever System |
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| ZHANG Jing,LIU Jinzeng,LIU Zhigang,CHU Wenping.Mechanical Characteristics of High-Speed Railway Catenary Cantilever System[J].Journal of Southwest Jiaotong University,2021,56(2):347-353. |
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| Authors: | ZHANG Jing LIU Jinzeng LIU Zhigang CHU Wenping |
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| Abstract: | In order to solve problems of parts’ fatigue cracks and falling off in the cantilever system for high-speed railway catenary, a study was conducted to investigate mechanical characteristics of the cantilever system. First, a finite element model of the cantilever system was established, whereby the static mechanical properties of the cantilever system were studied under different conditions of static wind load and icing load. Then, the modal analysis was performed to analyze the natural frequencies and mode shapes of the cantilever system. Based on the deformation equation, the transfer function of the load acting on the cantilever was derived, and the distribution rule of the force acting on cantilever brackets was obtained. Finally, the validity of the finite element model of the cantilever system was verified by a bench test. The result shows that the maximum displacement of the cantilever system occurs to the locating clamp. When the static wind load is applied, the maximum stress point of the cantilever system is at the joint-bolt of the inclined cantilever and the binaural casing. When the icing load is applied, however, the maximum stress point of the cantilever system is at the locating clamp. |
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