Dynamic Response of Transmission Lines Crossing High-Speed Railway

Transmission lines crossinghigh-speed railways are prone to cable rupture accidents, due to the frequent effects of train-induced wind. In this work, we propose a numerical simulation method for the dynamic response of transmission line caused by high-speed train, and validate it by field testing. We investigate the action mechanism of train-induced wind on transmission lines and the time domain responses of cables. Meanwhile the influences of different parameters are discussed, including train speed, train length, span length, and height of transmission lines. It shows that the response caused by the passing of high-speed trains lasts for tens of seconds, and the cumulative damage caused by train induced wind should not be ignored. Increasing the height of transmission line, changing the span length, or installing damping devices can effectively overcome the line vibration or mitigate its impact. The proposed method can help to improve the structure design of transmission lines crossing high-speed railway and can also be used for the design and optimization of damping devices.