| Title |
A Experimental Study on Train Speed and Wave Propagation Speed of Contact Wire according to the Speed-up |
| DOI |
https://doi.org/10.5370/KIEE.2013.62.12.1820 |
| Keywords |
Wave propagation speed ; Strain ; Uplift ; Contact wire ; HEMU-430x |
| Abstract |
An overhead catenary system is the one of the main subjects for increasing speed in electric railway. When a vehicle increases the speed over 350km/h, vibrations and wave propagation reflections occur severely. Therefore, the system suitable for the speed are needed. A wave propagation speed of contact wire is the main criteria to determine the tension for the system. Therefore, a train speed is restricted below 70% of wave propagation speed of it in European railway code. In this study, we measured a strain and uplift of contact wire while HEMU-430X tain is operated for the speed-up trial test in Kyungbu high-speed railway. The measured strain and uplift are analyzed with wave propagation speed according to the speed-up. The more a train speed reaches to a propagation speed, the more measured strain is high. Through the study, an experimental approach is performed about the code which a train speed is restricted below 70% of wave propagation speed of it. |