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Longitudinal steel rail constraining force test method for rail traffic

A test method and technology of rail transit, applied in the test of mechanical parts, the test of machine/structural parts, force/torque/work measuring instruments, etc., can solve the problems of difficult operation, complicated test process, inaccurate test results, etc. Achieve the effect of high accuracy, simple test process and easy operation

Active Publication Date: 2019-09-17
苏州集成校准检测认证有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the test results obtained by the test method of longitudinal rail binding force are often not accurate enough, and the test process is very complicated and difficult to operate

Method used

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  • Longitudinal steel rail constraining force test method for rail traffic
  • Longitudinal steel rail constraining force test method for rail traffic
  • Longitudinal steel rail constraining force test method for rail traffic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0024] like figure 2 As shown, for fasteners designed symmetrically with elastic strips, the sleeper 4 is first fixed by the rigid fixture 5, and then the rail 1 is fixed on the sleeper 4 by a single fastener 2, and then the load is applied longitudinally along the rail 1; for the spring strip staggered design Fix the sleeper 4 first, then fix the rail 1 on the sleeper 4 or other supporting structures through two fasteners 2 (the spacing between the fasteners is the standard spacing), and then apply the load along the longitudinal direction of the rail 1. A load-displacement test recording instrument 3 is connected between the rail 1 and the sleeper 4 .

[0025] During the loading process, record the displacement of the rail relative to the sleeper until the loading ends when the rail slides. Then the maximum load under the condition that the rail does not undergo inelastic deformation is obtained on the force-displacement diagram.

[0026] The load-displacement test record...

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PUM

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Abstract

The invention discloses a longitudinal steel rail constraining force test method for rail traffic. The method comprises the following steps: loading set loading force to steel rails, maintaining the loading force for a certain period of time, and measuring the loading force and the longitudinal displacement, relative to sleepers, of the steel rails from the beginning of loading; then continuously reloading to set loading force and maintaining for a certain period of time, and carrying out circulation in sequence for multistage loading; when the steel rails slide in buckles or the loading force exceeds or is equal to a set value, quickly reducing the load to zero, continuously measuring the displacement change of the steel rails for a certain period of time, then repeating the loading process again and again at an interval between every two times of loading, and drawing a force-displacement curve in each loading cycle; calculating the longitudinal elastic displacement before the steel rails slide; determining the amplitude of force F completely used for generating elastic deformation in each curve, abandoning an F value obtained in the first time, and calculating an average value of remaining F values to obtain the amplitude of longitudinal constraining force of the buckles for the steel rails. Accurate test result can be obtained, and the test process is simple and easy in operation.

Description

technical field [0001] The invention relates to the technical field of testing fasteners of urban rail transit, in particular to a method for testing longitudinal rail binding force of rail transit. Background technique [0002] Tracks in rail transit need to be fixed using track fasteners, which are composed of several parts to ensure that the rail is fixed to the supporting structure and in the required position, while allowing any necessary vertical, transverse and longitudinal displacement. This component includes components that distribute the load on the rails to the supporting structure, and must prevent wear on the contact surface of the supporting structure and ensure electrical insulation from the supporting structure. Fasteners include simple fasteners and separate fasteners. Simple fasteners are fasteners that directly fix rails to supporting structures (sleepers or track bed slabs) (may or may not include iron backing plates). The separate fastener is a fasten...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01L5/00
CPCG01L5/00G01M13/00
Inventor 周伦彬肖颖
Owner 苏州集成校准检测认证有限公司
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