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Numerical Study of Dynamic Loading on Ballastless Railway Tracks
https://orcid.org/http://orcid.org/0000-0002-1808-413X
In this study, an attempt is made to analyze the ballast-less track by modelling it as a 3D problem, and the solution is obtained using the ABAQUS CAE FEM package. Designs similar to RHEDA slab track has been modelled, which consists of three layers—concrete/asphalt bearing layer (CBL/ABL), hydraulically bonded layer (HBL) and frost protection layer (FPL, used for freezing temperatures) over subsoil base. The load is applied in static/linear step and motion is incorporated in dynamic/implicit step, point loads of 100 kN at the centre of each wheel are applied, and results for different speeds are obtained. Time increment is decreased to make the loading rate consistent. Indian broad gauge and UIC60 (approx.) rails are used. Mesh sizes are kept optimum to balance result precision and CPU time. For this study, speed of load is proportional to the difference between maximum downward deflection and maximum uplift. Maximum deflection also shows a linear correlation with both subcritical and supercritical speeds. The area under the curve for deflection versus normalized distance along path shows good proportionality at subcritical speeds.
Numerical Study of Dynamic Loading on Ballastless Railway Tracks
https://orcid.org/http://orcid.org/0000-0002-1808-413X
In this study, an attempt is made to analyze the ballast-less track by modelling it as a 3D problem, and the solution is obtained using the ABAQUS CAE FEM package. Designs similar to RHEDA slab track has been modelled, which consists of three layers—concrete/asphalt bearing layer (CBL/ABL), hydraulically bonded layer (HBL) and frost protection layer (FPL, used for freezing temperatures) over subsoil base. The load is applied in static/linear step and motion is incorporated in dynamic/implicit step, point loads of 100 kN at the centre of each wheel are applied, and results for different speeds are obtained. Time increment is decreased to make the loading rate consistent. Indian broad gauge and UIC60 (approx.) rails are used. Mesh sizes are kept optimum to balance result precision and CPU time. For this study, speed of load is proportional to the difference between maximum downward deflection and maximum uplift. Maximum deflection also shows a linear correlation with both subcritical and supercritical speeds. The area under the curve for deflection versus normalized distance along path shows good proportionality at subcritical speeds.
Numerical Study of Dynamic Loading on Ballastless Railway Tracks
https://orcid.org/http://orcid.org/0000-0002-1808-413X
In this study, an attempt is made to analyze the ballast-less track by modelling it as a 3D problem, and the solution is obtained using the ABAQUS CAE FEM package. Designs similar to RHEDA slab track has been modelled, which consists of three layers—concrete/asphalt bearing layer (CBL/ABL), hydraulically bonded layer (HBL) and frost protection layer (FPL, used for freezing temperatures) over subsoil base. The load is applied in static/linear step and motion is incorporated in dynamic/implicit step, point loads of 100 kN at the centre of each wheel are applied, and results for different speeds are obtained. Time increment is decreased to make the loading rate consistent. Indian broad gauge and UIC60 (approx.) rails are used. Mesh sizes are kept optimum to balance result precision and CPU time. For this study, speed of load is proportional to the difference between maximum downward deflection and maximum uplift. Maximum deflection also shows a linear correlation with both subcritical and supercritical speeds. The area under the curve for deflection versus normalized distance along path shows good proportionality at subcritical speeds.
Numerical Study of Dynamic Loading on Ballastless Railway Tracks
Lecture Notes in Civil Engineering
Sitharam, T. G. (editor) / Kolathayar, Sreevalsa (editor) / Sharma, Mukat Lal (editor) / Mandhaniya, Pranjal (author) / Shahu, J. T. (author) / Bakare, Mayuresh (author)
2021-03-23
10 pages
Article/Chapter (Book)
Electronic Resource
English
Numerical Study of Dynamic Loading on Ballastless Railway Tracks
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