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Track rigidity fast measuring method based on steel track deformation speed

A technology of deformation speed and measurement method, which is applied in the direction of railway vehicle shape measuring device, railway car body parts, railway auxiliary equipment, etc.

Active Publication Date: 2014-11-05
WUHAN WUDA ZOYON SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a rapid measurement method for rail stiffness based on rail deformation velocity

Method used

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  • Track rigidity fast measuring method based on steel track deformation speed
  • Track rigidity fast measuring method based on steel track deformation speed
  • Track rigidity fast measuring method based on steel track deformation speed

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Embodiment Construction

[0028] In order to better understand the present invention, the principle of the present invention will be firstly described below.

[0029] 1. The establishment of rail deformation deflection curve model.

[0030] Assume that the rail is an infinitely long beam on an elastic foundation, such as figure 2 As shown, according to the Euler-Bernoulli beam theory and the Winkler foundation model, the deflection curve differential equation of the rail deformation curve can be deduced, as shown in Equation 1, where F is the normal pressure at this point, E is the rail rigidity, and I is the moment of inertia of the rail, k is the elastic coefficient, x is the horizontal distance from the load center, and y is the deflection.

[0031] EI d 4 dx 4 y ( x ) + ky ( x ...

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Abstract

The invention discloses a track rigidity fast measuring method based on steel track deformation speed. The method comprises the following measuring steps that a measuring carrier runs on steel tracks at certain speed; the running speed of the measuring carrier and the steel track vertical deformation speed of multiple points on a steel track deflection line at a certain moment point are measured, and pressure loads exerted to the steel tracks by the measuring carrier are measured; a deflection line slope equation set is introduced into the running speed of the measuring carrier and the steel track vertical deformation speed of the points on the steel track deflection line, and deflection line parameters are obtained through calculation; according to the steel track maximum deflection value computational formula, the maximum deflection value of the steel tracks is obtained through calculation; according to the steel track rigidity computational formula, the rigidity of the steel tracks is obtained through calculation. The method supports dynamic collection, the measuring result is not influenced by steel track surface uneven abrasion, weld zone irregularity, track irregularity and other factors, on the basis of fast measurement, the track rigidity is accurately measured, and cost consumption is indirectly reduced.

Description

technical field [0001] The invention relates to a method for measuring rail stiffness. Background technique [0002] Rail stiffness refers to the vertical load (unit: kN / mm) required for the rail to produce unit subsidence, where the unit subsidence of the rail refers to the unit vertical deformation of the rail under the vertical pressure load. [0003] Track stiffness is an important parameter that affects the vibration and deformation of the track structure, the safety and stability of train operation, and the workload of track maintenance and repair. Reasonable track stiffness can not only ensure the safe and stable operation of the train, but also effectively slow down the wheel-rail interaction. Reduce the dynamic stress of the track structure and keep the geometric state of the track in good condition, thereby reducing the maintenance and repair workload of the rail. [0004] At present, there are many methods for measuring the vertical stiffness of the track, some a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61K9/08
Inventor 李清泉张德津曹民林红曲旋王新林孙小进马斌
Owner WUHAN WUDA ZOYON SCI & TECH
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