Ballastless track elastic fastener damage identification method

A technology of elastic fasteners and ballastless track, which is applied in the field of ballastless track detection, can solve the problems of inability to accurately identify the location and degree of damage at the same time, and low efficiency, so as to achieve effective and rapid detection, ensure accuracy, and improve accuracy Effect

Active Publication Date: 2020-01-24
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

The detection of elastic fasteners mainly relies on manual inspection along the line, so the traditional manual inspection method is inefficient, and the working time is limited by the time of the skylight, and there are certain defects in the existing fastener damage detection technology. It can only detect the appearance status of the fastener, that is, whether it is missing or broken, and cannot accurately identify the location and degree of damage at the same time

Method used

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  • Ballastless track elastic fastener damage identification method
  • Ballastless track elastic fastener damage identification method
  • Ballastless track elastic fastener damage identification method

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Embodiment Construction

[0050]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0051] Such as figure 1 As shown, the present invention proposes a damage identification method for ballastless track elastic fasteners, which method includes the following steps:

[0052] S1 establishes and optimizes a non-destructive finite element model for the ballastless track in a non-destructive state, and then determines the non-destructive stiffness coefficient of the elastic fastener; ...

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Abstract

The invention belongs to the field of ballastless track detection, and particularly discloses a ballastless track elastic fastener damage identification method. The method specifically comprises the steps of establishing and optimizing a lossless finite element model, and determining a lossless rigidity coefficient of the elastic fastener; measuring actual exciting force data and actual acceleration time history data; substituting the actual exciting force data into the lossless finite element model to obtain simulated acceleration time-history data; according to the actual acceleration time-history data and the simulated acceleration time-history data, calculating an actual rigidity coefficient of each elastic fastener by utilizing an MCMC method; and judging whether the ratio of the actual stiffness coefficient to the lossless stiffness coefficient is 1 or not, if so, determining that the elastic fastener is not damaged, and if not, determining that the elastic fastener is damaged. According to the method, the influence of uncertain factors can be eliminated during testing, and only the damage condition of the elastic fastener is considered, so that the damage identification accuracy of the ballastless track elastic fastener is effectively improved.

Description

technical field [0001] The invention belongs to the field of ballastless track detection, and more particularly relates to a damage identification method for elastic fasteners of ballastless track. Background technique [0002] The track structure of high-speed railways at home and abroad mainly adopts two types: ballasted track and ballastless track. Among them, the high-speed railway ballastless track structure has gradually been widely used in the high-speed railway track structure due to its good overall performance, extremely high ride comfort and stability during operation. [0003] In the ballastless track structure of high-speed railway, the elastic fastener connects the rail and the track slab, plays the role of fixing the rail, and is an important part of the track structure. With the development trend of high-speed and heavy-duty trains, the under-rail foundation of the track structure will be subject to great impact and vibration, resulting in varying degrees of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/23G01M5/00
CPCG01M5/0066G01M5/0075
Inventor 胡琴袁瑞杰朱宏平沈易军陈晗
Owner HUAZHONG UNIV OF SCI & TECH
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