Rigid Frame Of The Ansys Analysis And The Secondary Development Of Cwr Track

The mutual additional longitudinal force transmission between continuously welded rail (CWR) and railway bridges is an important force for railway bridges.If the force is too great ,it may cause the buckling of track or rupture of rail,the running safety of high-speed train is threatened.Moreover,the mutual additional longitudinal force transmission between CWR and railway bridges is one or control loads for the design of pier and abutment and the foundation of it.Thus the calculation of the additional force is quite important in engineering application. in addition,to satisfy the demand of more and more busy railway transport,the best measure of improving track structure is paving continuously welded rails;It has to check the pier when paved CWR,Thus developing the calculation software of pier checking is also quite important in engineering application.The mechanics calculation model on this aspect at present is usually plane model.In fact,the bridges,pier,and abutment as well as load of the railway are of strongly spatially mechanics characteristics,the plane mechanics calculation model in this aspect can not reflect the situations mentioned above effectively,and has its limitations.In this paper,based on the achievements of predecessors,a three-dimensional finite element space mechanical model for calculating the additional longitudinal force transimission between CWR and railway bridges is established.furthermore the author makes a detailed study on the additional longitudinal force transmission between CWR and railway bridges with the model,the main content of this paper are as follows:(1)A static three-dimensional finite element mechanical model which regards track-ballast-beam-pier and abutment as an integrated system for calculating the additional longitudinal force transmission between CWR and railway railway bridges is established,examples are given to validate the calculation model.(2)With the static finite element model,taking a Continuous Rigid Frame Bridge in li-qin line as an example, the characteristics of additional longitudinal force of rail have been analyzed; and the auther also studies the influences of different operation condition, The value of roadbed vertical resistance on the mutual interaction between CWR and continuous rigid frame bridge in detail.With the static finite element model,taking a curve continuous rigid frame bridge in nan-kun line as an example., the characteristics of additional longitudinal force of rail have been analyzed; and the auther also studies the influences of different operation condition,temperature variation of beam,bearing friction resistance on the mutual interaction between CWR and curve continuous rigid frame bridge in detail.(3)Combining Visual C++ with universal finite element software ANSYS secondary development language, and using Visual C++ to develop pier rating system; the difficulty of 3D model is greatly reduced,work efficiency is also increased.