기설 전차선로에서 전차선 장력 증가 시 오버랩 구간의 무효 인상 지점의 기하 형상의 변화 예측

초록

It happens occasionally that the tension of the contact lines of a operational line is necessary to be increased. The maximum speed test plan in the HEMU-400X(next Korean high speed train) developing projects is a good example. When the contact wire tension would be changed in existing track, some changes in the respect of the contact line geometry are expected. Among them, the contact wire vertical plane geometry change(pre-sag change) in the ordinary pre-sagged span was discussed previously. Subsequently, in this time, we treat of a contact wire vertical plane geometry change in the elevated span of overlaps. Increasing the tension of the existing contact wire makes the elevation starting point position move. In this paper, firstly, we discuss the calculation methods of the elevation starting point position, and then we calculate the amount of the position changed due to the tension increasing in the condition of Gyeongbu-2 HSL Catenary.