Three-dimensional fast form-finding method for catenary suspension based on static spatial position of catenary

Abstract

The invention relates to a contact line static space position-based contact network suspension three-dimensional rapid shape finding method. The method comprises the following steps: firstly, calculating vertical forces of a contact line dropper point and a positioning point according to a contact line static space position; calculating the three-dimensional static shapes of the carrier cable andthe elastic sling according to the static space position of the contact line, the vertical force of the dropper point and the displacement constraint of the dropper point of the contact line; calculating the gradient and the spatial position of the positioner according to the static spatial position of the contact line, the vertical force of the positioning point and the length of the positioner;and finally, calculating the three-dimensional static shape of the contact network suspension according to the three-dimensional static shapes of the carrier cable and the elastic sling at the staticspace position of the contact line and the slope of the positioner. According to the method, the actual stress state and elastic deformation of the overhead line system suspension cable are considered, the method is simple and efficient, simple chain shapes of various line conditions and actual contact line static space positions and three-dimensional static shapes of elastic chain shape suspension can be accurately calculated, and the method is directly applied to pantograph-catenary system design, overhead line system construction pre-configuration and overhead line system state maintenance.

Description

Technical field [0001] The invention relates to the technical field of railway catenary, in particular to a three-dimensional quick form-finding method for catenary suspension based on the static spatial position of the contact line. Background technique [0002] The catenary is a power supply network laid along the railway, which transmits electric energy through the sliding contact with the pantograph above the high-speed EMU. The static position of the contact wire in space affects the dynamic current receiving performance of the pantograph and catenary, as well as the vibration load of the catenary components. Standard TB 10758-2018 "Quality Acceptance Standard for Construction Quality of High-speed Railway Electric Traction Power Supply Engineering" has strict regulations on the static space position of the contact wire, such as: the allowable deviation of the contact wire pullout value is ±30mm, and the allowable deviation of the contact wire suspension point from the rail ...

AI Technical Summary

Problems solved by technology

The patent "A Calculation Method for Initial Static Balance State of Electrified Railway Catenary" and the document [Zou Dong. Research on Vibration Behavior of High-speed Railway Catenary [D]. 2017.] use finite element iteration to calculate the displacement increment of each node of the catenary, Update the coordinates of the catenary structure nodes, take the displacement of the catenary model under the action of gravity less than a certain set capacity as the convergence index, determine the final three-dimensional static suspension shape of the catenary by judging the size of the displacement increment, and use this method to calculate the EN50318 reference model 1, the number of iterations is 16, and the calculation time is directly related to the number of iterations. If the calculation model is complex and the number of nodes is large, more iterative calculations will not be conducive to the rapid realization of large-scale complex catenary suspension form-finding. shape

[0004] Summarizing the existing technology, it is found that the current form-finding methods for catenary suspension are mostly aimed at the two-dimensional form-finding of catenary suspension for the design value of the static space position of the catenary. Or maintenance stage, for the catenary suspension 3D form-finding of the design value or actual value of the static space position of the contact line, especially the fast form-finding

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