Development Of Finite Element Model And Software Based On Ballastless Track Temperature Field Theory

Ballastless track structure has been widely used in the construction of high-speed railway in China.Because its main structure is composed of concrete,temperature change will have an impact on it.Therefore,in the daily operation of railway workers,it is necessary to define the overall temperature and temperature gradient of the track,and then judge the internal state of the track.However,in the actual process,it is still impossible to achieve real-time monitoring of all-weather and all-terrain of the whole line.Therefore,the research on calculation and prediction of ballastless track temperature field has important application value for maintenance and health monitoring of Ballastless track.In this paper,aiming at the temperature field of internal structure of Ballastless track,the theoretical basis is sorted out,the finite element model is established,the secondary development of software and the correction and comparison of the results of practical examples are carried out.The main research contents and results are as follows:(1)The existing theory of temperature field of ballastless track is summarized.Through the analysis of the theoretical research data of temperature field at home and abroad,the boundary conditions and heat transfer relationship are established by using ANSYS thermal analysis module,and the finite element simulation model of temperature field in ballastless track is established.(2)Through the secondary development of ANSYS software by Python,combining the ANSYS finite element software with the data processing function of Python internal module,the ballastless track temperature field monitoring and prediction software-TMW based on Python language is developed.(3)Verify the results of TMW calculation,get the data through the test,compare the results of the software development with the test results,analyze the overall temperature and temperature gradient of the track plate,point out the parts of the software that need to be debugged,and lay the foundation for further research.