| 起伏地形上的铁路环境振动特性研究 |
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| 引用本文： | 卢华喜,万佳新,梁平英,吴必涛.起伏地形上的铁路环境振动特性研究[J].科学技术与工程,2020,20(11):4520-4527. |
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| 作者姓名： | 卢华喜 万佳新 梁平英 吴必涛 |
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| 作者单位： | 华东交通大学土木建筑学院,南昌 330013;华东交通大学土木建筑学院,南昌 330013;华东交通大学土木建筑学院,南昌 330013;华东交通大学土木建筑学院,南昌 330013 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目）；江西省教育厅科技项目 |
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| 摘 要： | 越来越多的高速铁路修建在场地条件复杂的山区起伏地带，为了研究起伏地形对铁路环境振动的影响，本文建立了列车作用下路基-起伏地形的二维有限元计算模型,研究了四种起伏地形上的铁路环境振动特性。结果表明：四种起伏地形对地面加速度都存在减小效应；连续凸起地形上的竖向、水平振动位移均出现放大效应,而连续凹陷地形上的竖向、水平振动位移均出现减小效应；在凸起地形与凹陷地形组合的起伏地形上,凸起地形部分水平振动位移出现了明显的放大效应,凹陷部分水平振动位移又出现了明显的减小效应；先凸后凹地形对铁路环境振动的减弱作用比先凹后凸地形更明显。
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| 关 键 词： | 起伏地形 铁路环境振动 地面加速度 振动位移 |
| 收稿时间： | 2019/7/26 0:00:00 |
| 修稿时间： | 2020/1/2 0:00:00 |
Effects of Rugged Topography on Railway Environmental Vibrations |
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| Lu Huaxi,Wan Jiaxin,Liang Pingying,Wu Bitiao.Effects of Rugged Topography on Railway Environmental Vibrations[J].Science Technology and Engineering,2020,20(11):4520-4527. |
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| Authors: | Lu Huaxi Wan Jiaxin Liang Pingying Wu Bitiao |
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| Affiliation: | School of Civil Engineering,East China Jiaotong University,School of Civil Engineering,East China Jiaotong University,School of Civil Engineering,East China Jiaotong University,School of Civil Engineering,East China Jiaotong University |
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| Abstract: | More high-speed railways are being built in areas with complex, rugged topography. In order to Study the influence of rugged topography on railway environmental vibration,two-dimensional(2D) finite element calculation models of subgrade-rugged topography are established by finite element method, to study the effects of rugged topography on the environmental railway vibrations. The results show that the four kinds of rugged topography reduce the ground acceleration; the vertical and horizontal vibration displacements are amplified on convex topography, while the vertical and horizontal vibration displacements are decreased on canyon topography. canyon after convex topography has a greater effect on the vibration displacement than convex after canyon topography. |
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