| Welded turnout is one of the most important parts in continuous welded rail, which can improve the speed and stability of the vehicles. The specialty of welded turnout is the basal rails that bear additional temperature force, the temperature force and deformation of the rails in turnout zones are also complex.Based on the finite element principle, a model of weled turnout has been established. According to the characteristic of the elements in ANSYS, different elements are choosed to simulate the rail, tie, fastening, ballast, spacer block, and restricting device so on. Analysis and calculation are carried out on the temperature stress and deformation of NO. 18 welded turnouts by using the model and appropriately parameters selected. The calculation results compared with the testing results of the experts. It validates the results is exact and the calculation model is reasonable.Analysis system of welded turnout is developed based on the fundamental features of ANSYS. Using UIDL to design user interface, establish eyeable dialog box, which realizes the input of parameters and APDL to realize modification of parameters and embedment of module, which makes the modules be a part of ANSYS. The system can decrease much repetitive work in process of analysis after the secondary development, only to input different parameters and select different models that can calculate the temperature stress and deformation of continuous welded turnout in every case, which operates simply and can improve the efficiency of ANSYS sysytem. The influences of some parameters on the rail displacement and temperature forces of welded turnout are analyzed and summarized the disciplinarian.Finally the paper has analyzed the case of welded turnouts that lies on the bridgehead; proper calculation model is built and compared with the force and displacement of welded rail on bridge and continous turnout on roadbed. All that can be used to guide the structural design and the maintenance of continuous welded turnout. |
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