Abstract
In order to study the dynamic response of the rail embankment under different speeds and moving load of following vehicles, a model experiment with a ratio of 1:10 is established to test the time history of acceleration and the earth pressure of the embankment at various train speeds. Using the ABAQUS finite element calculation software, a train load is applied through the FORTRAN subroutine, thereby establishing a three-dimensional finite element model with the same size as the model experiment. The data and conclusions of the finite element method model are verified by the model experiment. The model also makes some supplements to the model experiment. The experimental results show that with the increase of speed, the peak acceleration and earth pressure of the embankment also increase. By analyzing the experimental data, it can also be found that the vertical acceleration of the embankment is much greater than the axial acceleration and the lateral acceleration. In addition, the elastic modulus of the soil and the sleeper pitch also have some influence on the acceleration.
摘要
为了研究路基在不同速度下由车辆荷载引起的动态响应,建立了比例为1:10的模型实验,以 测试不同列车速度下路基的加速度和土压力。使用ABAQUS有限元计算软件,通过FORTRAN子程序 来施加列车移动载荷,建立与模型实验相同尺寸的三维有限元模型。通过对比模型实验和有限元方法 的数据,验证了有限元方法的数据和结论。该有限元模型也为模型实验提供了补充。实验结果表明, 随着速度的加快,路基的峰值加速度和土压力也随之增加。通过分析实验数据,发现路基的垂直加速 度远大于轴向加速度和横向加速度。另外,土壤的弹性模量和轨枕间距也对加速度有影响。
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The overarching research goals were developed by YANG Chang-wei, DING Xuan-ming, and QU Li-ming. QU Li-ming and YUAN Cheng provided the experimental data, and analyzed the measured data. YANG Chang-wei, QU Li-ming, and YUAN Cheng established the model and calculated the earth pressure and acceleration. QU Li-ming, YUAN Cheng and LIU Wei-bin analyzed the calculated results. The initial draft of the manuscript was written by YANG Chang-wei, QU Li-ming, and YUAN Cheng. All authors replied to reviewers’ comments and revised the final version.
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YANG Chang-wei, YUAN Cheng, QU Li-ming, DING Xuan-ming and LIU Wei-bin declare that they have no conflict of interest.
Foundation item: Project(2018YFE0207100) supported by the National Key R&D Program of China; Project(52078426) supported by the National Natural Science Fundation of China; Projects(2020YJ0253, 2020YFSY0060, 2019JDRC0133, 2019JDRC0134) supported by the Sichuan Provincial Science and Technology Support Project, China; Project(K2019G009) supported by the Science and Technology Research and Development Plan of China National Railway Corporation Limited; Projects (SY2016G003, N2020T004) supported by the China National Railway Group Co. Ltd. Scientific Research Project; Project(LNTCCMA-20210109) supported by the Key Laboratory of New Technology for Construction of Cities in Mountain Area, China; Project(2021M692689) supported by the China Postdoctoral Science Foundation
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Yang, Cw., Yuan, C., Qu, Lm. et al. Experimental and numerical studies on vibration characteristics of a railway embankment. J. Cent. South Univ. 29, 1641–1652 (2022). https://doi.org/10.1007/s11771-022-5030-9
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DOI: https://doi.org/10.1007/s11771-022-5030-9