| Abstrakt: |
In recent years, new type of slab ballastless track developed from CRTS III type has been widely applied to track of metro and intercity. In order to accurately obtain the effect of the structure under loading in the R&D and design, beam-plate-plate model is generally employed, which is difficult. Furthermore, there exists nonlinear contact relationships between the layers of the structure and between the track slab and the boss, thus high precision computational analysis can only rely on general FEM software. But these software are cumbersome to use, expensive to learn, and difficult for designers to master. In addition, after the implementation of the Code for Design of Railway Track (Limit State Method) Q/CR 9130-2018, the design method of the track structure is changed from tolerate stress- based method to limiting condition-based method, which is large change. Therefore, the software is developed based on ANSYS platform. In the software, the parametric modeling and static analysis module are developed by APDL; the reinforcement design and structure checking module is developed by APDL and C ++; the automatic generation module for calculation reports is developed by Python; the UI, including menus and dialogs, is developed by UIDL. Via menus and dialogs, all functions in the software are implemented: by entering the design parameters, the establishment and static analysis of the refined 3D finite element model are automatically completed; afterwards the stress, deformation, internal force and effect combination results of each component of the track can be viewed; by entering or modifying arrangement of bars or reinforcements, the checking according to the design code can be completed and the calculation report can be automatically generated. By comparing with the code method and other literature calculation results, the accuracy of the finite element analysis of this software is verified. Thanks to this software, the time expense of the model-building and arrangement of bars or reinforcements for the slab ballastless track has been reduced from several days to several hours, and the time expense of completing the calculation report has been reduced from hours to seconds. [ABSTRACT FROM AUTHOR] |
