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Correction method of overall chord length for quintic parabolic transition curve

A parabola and curve technology, applied in the direction of instrumentation, geometric CAD, calculation, etc., can solve the problems of suspension string scrapping economy, loss, etc., and achieve the effect of reasonable use, accurate calculation results, and clear calculation process

Active Publication Date: 2019-05-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the calculation is inaccurate, the suspension string may be scrapped and cause a lot of economic losses

Method used

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  • Correction method of overall chord length for quintic parabolic transition curve
  • Correction method of overall chord length for quintic parabolic transition curve
  • Correction method of overall chord length for quintic parabolic transition curve

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Embodiment Construction

[0018] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0019] figure 1 It is a schematic diagram of the correction of catenary hanging chord length between two pillars on a flat curve, in which the three black points on the actual contact line are the contact line hanging points, and the contour line of the ideal contact line is the projection of the ideal contact line in the vertical direction of the track plane. The contour line of the contact line is the projection of the actual contact line in the vertical direction of the orbital plane. In the figure, the centerline of the horizontal curved orbit is taken as...

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Abstract

The invention discloses a quintic parabola type easement curve based contact network complete dropper length correcting method. The correcting method includes: performing correcting calculation on the dropper length of a flat curve, establishing a corresponding calculation formula, and using a flat curve rail central line as an original point and the horizontal direction pointing to a center of a circle as the X-axis positive direction; performing deduction on a radius of curvature of a quintic parabola type easement curve and an included angle between a rail plane and a horizontal plane, and establishing a corresponding formula; and finally performing correcting calculation on the dropper length of the quintic parabola type easement curve, and establishing a corresponding calculation formula. The quintic parabola type easement curve based contact network complete dropper length correcting method is reasonable in use of calculation process and theory, is clear in calculation process, is accurate in calculation result, and provides a positive effective method for correcting and calculating the dropper length of a contact network.

Description

technical field [0001] The invention belongs to the field of electrified railways, and in particular relates to a method for correcting the overall suspension string length of a catenary based on a quintic parabolic relaxation curve. Background technique [0002] The requirement for catenary installation is that the vertical distance between the catenary line and the track plane remains constant under any line conditions. The catenary is connected with the catenary by catenary cables and suspension strings, and the distance between the contact line and the track plane at the suspension point is kept constant by controlling the length of the suspension strings. At present, in the catenary of high-speed electrified railways, the non-adjustable crimping integral hanging strings have gradually replaced the traditional link hanging strings. This hanging string is prefabricated and then installed, and can be installed in place at one time during construction without adjustment. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F2111/10
Inventor 阮杰吴继成路利彬余昉
Owner WUHAN UNIV OF TECH