Entirety and part combined identification method of ballastless track damage

An identification method and ballastless track technology, which is applied in the direction of analyzing solids using sound waves/ultrasonic waves/infrasonic waves, can solve problems such as unsuitable ballastless track damage detection, and achieve high detection accuracy and easy test operation

Inactive Publication Date: 2014-09-10
SOUTHWEST JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

Ground penetrating radar detection equipment, which is widely used in highways, is not suitable for ballastless track damage detection due to the influence of steel bars in ballastless tracks

Method used

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  • Entirety and part combined identification method of ballastless track damage
  • Entirety and part combined identification method of ballastless track damage
  • Entirety and part combined identification method of ballastless track damage

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Embodiment Construction

[0018] figure 1 The working process of the method of the present invention is expressed. First, the overall damage identification method-curvature modal method is used to determine the area where the damage occurs; secondly, the local damage detection technology-shock echo method is used to further determine the damage depth in the damaged area; Accurately locate the spatial position of the damage, that is: 1) Arrange acceleration sensors at a certain distance on the track slab, use multi-point excitation and multi-point acquisition to collect the surface acceleration of the track slab, and then perform modal analysis to identify the rough area of ​​the damage ; 2) After 1) is completed, the shock echo technology is used to identify the depth of the damage, and finally locate the spatial position of the damage accurately.

[0019] In order to verify the accuracy of Gaussian curvature in identifying ballastless track damage, a slab ballastless track model was made indoors, with...

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Abstract

The invention discloses an entirety and part combined identification method of a ballastless track damage. The method comprises the steps of firstly determining a damage region by use of a damage entirety identification method-curvature modal method, then determining the damage depth of the damage region by use of the damage part detection technology-impact echo, and finally, accurately determining the spatial position of the damage, that is, (1) arranging acceleration sensors on a track plate at intervals, acquiring the surface accelerated speed of the track plate in a multi-point excitation and multi-point acquisition mode, and then performing modal analysis to identify a roughly damage region; (2) utilizing the impact echo technology to identify the damage depth after the step (1) is completed, and finally, accurately determining the spatial position of the damage. The method has simplicity in testing operation and has high detection precision.

Description

technical field [0001] The invention belongs to the technical field of railway tracks, in particular to the field of damage detection of ballastless tracks of high-speed railways. Background technique [0002] The main structural types of high-speed railways in my country include slab ballastless track and double-block ballastless track structure, and the total mileage in operation has reached tens of thousands of kilometers. Ballastless track is widely favored for its smoothness, high stability, long service life, good durability, and less maintenance work. However, the track slab, track bed slab, CA mortar, support layer, etc. In the complex atmospheric environment, it bears the continuous action of water, temperature and train load all the year round. At the same time, due to the limit value of the construction environment, construction conditions and construction technology of these basic structures during construction, the ballastless track structure produces Therefore...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 王平陈嵘肖杰灵韦凯赵才友胡志鹏徐井芒
Owner SOUTHWEST JIAOTONG UNIV
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