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Failure analysis method for suspended structural member of subway power supply network and application thereof

A technology for suspension structure and failure analysis, which is applied in the direction of material analysis, material analysis by optical means, material analysis by wave/particle radiation, etc. The effect of accurate positioning and simple operation

Inactive Publication Date: 2016-08-17
SHANDONG ANALYSIS & TEST CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of corrosive elements and fatigue on the suspension structure will make the fracture mechanism more complicated and the diagnosis work more difficult
At present, the establishment of failure analysis methods for such complex situations is not perfect
Although there are many methods for failure analysis, none of them can conduct an accurate and comprehensive analysis of this type of failure.

Method used

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  • Failure analysis method for suspended structural member of subway power supply network and application thereof
  • Failure analysis method for suspended structural member of subway power supply network and application thereof
  • Failure analysis method for suspended structural member of subway power supply network and application thereof

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] 1) The present invention provides the damaged stainless steel suspension structure in practice, such as figure 1 shown. The suspension structure is a catenary sliding suspension structure in an underground section of a subway, which breaks during use. It can be seen from the macroscopic inspection that the fracture position of the suspension structure is close to the part clamped by the clamp bolt (that is, close to the ear ring formed by the processing of the suspension structure).

[0029] 2) Collect all the broken fragments of the damaged suspension structure and observe its macroscopic appearance. The fracture surface and sides of the failed suspension structure were carefully inspected with the naked eye and a stereomicroscope under strong light. The inspection results showed that, compared with the used but unfractured structura...

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Abstract

The invention discloses a failure analysis method for a suspended structural member of a subway power supply network and application thereof. The method comprises the following steps: taking a sample (including a fracture surface) from a fracture of a suspended structural member which has a fracture failure, cleaning the sample and carrying out macroscopic inspection on the fracture and surrounding places thereof by using a stereoscopic microscope; observing the microscopic morphology of the fracture by using a scanning electron microscope; then carrying out qualitative elementary analysis on the surface of the fracture by using an electron probe X-ray microanalyzer; and subjecting the sample to analysis of relative distribution of elements via the electron probe X-ray microanalyzer and analyzing causes of the failure of the suspended structural member according to detection results. The method combines equipment like the stereoscopic microscope, the scanning electron microscope and the electron probe X-ray microanalyzer for identification of causes of the failure of a suspended structure, and the equipment complement each other; so the whole analysis process is well-grounded, accurate, visual, convenient and practicable, and analysis and positioning of impurity elements are also accurate.

Description

technical field [0001] The invention specifically relates to a failure analysis method and application of a suspension structural member of a subway power supply network. Background technique [0002] With the development and progress of modern economy, urban rail transit plays an increasingly important role in social development and citizens' daily life. At present, nearly 100 subway lines have been built across the country, covering more than 20 large and medium-sized cities. One of the key links to maintain the normal operation of the subway is the power supply network system of the subway. Among them, the catenary is an important part of the power supply system and the source of power for the high-speed operation of the train. The suspension structure is the support of the entire catenary, the transmitter of vibration and force between the power supply line and the catenary cable, and the key component for the safe operation of the catenary. Once there is a problem wit...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N23/22G01N23/225
CPCG01N21/84G01N23/2206G01N23/225
Inventor 丁宁时军波胡志文
Owner SHANDONG ANALYSIS & TEST CENT
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