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 acceleratio...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.展开更多
基金Project(2018YFE0207100)supported by the National Key R&D Program of ChinaProject(52078426)supported by the National Natural Science Fundation of China+4 种基金Projects(2020YJ0253,2020YFSY0060,2019JDRC0133,2019JDRC0134)supported by the Sichuan Provincial Science and Technology Support Project,ChinaProject(K2019G009)supported by the Science and Technology Research and Development Plan of China National Railway Corporation LimitedProjects(SY2016G003,N2020T004)supported by the China National Railway Group Co.Ltd.Scientific Research ProjectProject(LNTCCMA-20210109)supported by the Key Laboratory of New Technology for Construction of Cities in Mountain Area,ChinaProject(2021M692689)supported by the China Postdoctoral Science Foundation。
文摘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.
