Long and large ramp straight line segment center anchoring positioning method for high-speed railway

Abstract

The invention relates to the technical field of contact network center anchoring, in particular to a long and large ramp straight line segment center anchoring positioning method for a high-speed railway, and aims to provide the long and large ramp straight line segment center anchoring positioning method for the high-speed railway in order to solve the problems in the prior art. In order to solvethe defects of low calculation precision and lack of a calculation method for the position of a central anchoring wire clamp in the existing calculation method for the central anchoring position of the long and large ramp segment overhead line system, the method comprises the following steps of: introducing a line gradient and adopting the actual measurement length of a span; calculating a cabletension difference caused in the line direction and a downhill component caused by the gravity of the cable in the line direction when the positions of a dropper and a positioning device deviate; andcalculating the position of the contact line center anchoring wire clamp according to the obtained tension difference and the downhill component, establishing a contact network model by using ANSYS finite element analysis software to obtain the height difference between the carrier cable and the contact line at the position of the contact line center anchoring wire clamp, and further obtaining thelength of the center anchoring rope.

Description

technical field [0001] The invention relates to the technical field of catenary central anchoring, in particular to a positioning method for the central anchoring of a straight section of a long slope of a high-speed railway. Background technique [0002] The central anchor knot is an important part of the catenary. The central anchor knot can balance the tension of the left and right half-anchor cables, reduce the scope of accidents, and prevent the cables from moving. The offset of the center anchor position will make the force unbalanced on the left and right half anchors, which will increase the wear and tear of the contact wire and the risk of wire breakage. A loose central anchor knot can also cause pantograph-catenary accidents. Therefore, it is of great significance to study the location optimization of catenary central anchor nodes. [0003] At present, the location of the central anchor is mainly carried out by calculating the tension difference of the thread in ...

AI Technical Summary

Problems solved by technology

This method mainly determines the location of the central anchor knot by calculating the cable tension difference caused by the offset of the suspension string and the offset of the positioning device when the temperature changes. When using the average length of the span, it is inconsistent with the actual situation; when determining the position of the central anchor in the span, the central anchor is usually set in the middle of the span, and there is a lack of corresponding theoretical analysis

The above deficiencies will lead to low calculation accuracy of the central anchor knot position, especially for complex lines such as long ramps

Due to the lack of corresponding theoretical guidance, when installing the central anchor, it can only be adjusted repeatedly on site, which not only increases the workload of workers, but also causes many quality problems

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