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Analysis of the Adaptibility of Jointless Track Circuit to Ballast-Less Track

Author: HouZhenYu
Tutor: GaoShiBin
School: Southwest Jiaotong University
Course: Proceedings of the
Keywords: Non-ballasted track Track circuit Finite element method Compensation current
CLC: U284.2
Type: Master's thesis
Year: 2009
Downloads: 95
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Abstract


Non-ballasted track and the track circuit is the two key technologies for the development of China 's high-speed railway will be widely used . Non-ballasted track with its smooth, safe , easy to maintain, play an important role in promoting the development of the entire rail transport . However , the introduction of non-ballasted track caused some adverse effects on the track circuit , the reinforced network criss-crossing in the non-ballasted track plate increased energy attenuation in the transmission signal current will eventually lead to the transmission of the entire track circuit The length of the drop. This never ballasted track the physical model of the plate to start of finite element method , using the Maxwell 3D software on a single rail , the ballasted track conditions and non-ballasted track conditions simulation and comparative analysis to identify the cause rail reasons for the decline of the transmission performance . By analyzing the characteristics of the reinforced network around the magnetic field distribution , targeted to the introduction of the compensation current , and ultimately determined by comparing the the compensation current position , current-carrying conductor and shunt proportion . Finally, the simulation calculation model for compensation , by contrast with uncompensated model to assess the measures for improvement . Simulation results show that , when introduced to the compensation current , current-carrying conductor and shunt the right proportions , can completely eliminate the non-ballasted track on the track circuit . In the study, but also on the accuracy of the model , some relevant analysis , some discussion is given for the problem may result in an error . After discussion found , the biggest shortcoming of the modeling may be derived from the rail impedance value is not calculated , but rather only from a macro point of view of the energy attenuation analyzed . Not considered other factors also affect the accuracy of the model . In conclusion, the established model can reflect non-ballasted track the adverse effects of non - insulated track circuit , at the same time , through the study of this model can be finally obtained several ways to solve this effect . This model also in the process of establishing the presence of some error , but the error level is within the acceptable range .

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CLC: > Transportation > Rail transport > Railway communication,signal > Railway signal > Track circuit
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