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Coupler body residual life determination method and device

A determination method and hook body technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as short service life of the coupler

Pending Publication Date: 2019-08-20
CHINA SHENHUA ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, because it is impossible to accurately understand the remaining service life of the coupler body after the cracks appear, the inspection of the coupler cracks is relatively strict. Once the main structure of the coupler has cracks, it will be regarded as scrapped, resulting in a short service life of the coupler.

Method used

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  • Coupler body residual life determination method and device
  • Coupler body residual life determination method and device
  • Coupler body residual life determination method and device

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Embodiment Construction

[0034] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.

[0035] figure 1 It is a flowchart of a method for determining the remaining life of a coupler coupler body provided by an embodiment of the present invention. Such as figure 1 As shown, the method includes:

[0036] Step S11, detecting the initial crack size of the coupler body;

[0037] Step S12, according to the load of each level of load spectrum and the initial crack size of the coupler body, determine the stress intensity factor range of each node at the crack front of each level of load spectrum;

[0038] Step S13, determining the average crack growth rate of each node a...

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Abstract

The embodiment of the invention provides a coupler body residual life determination method and device, and belongs to the field of railway transportation. The method comprises the steps of detecting the initial crack size of a car coupler body; determining the stress intensity factor range of each node at the front edge of the crack of each stage of load spectrum; determining the average crack propagation rate of each node at the front edge of the crack; determining the number of cyclic loading times required by single crack propagation; determining the expansion amount of the nodes except theexpansion point; determining a new crack size, and using the new crack size as the initial crack size to repeat the above steps until any one of the maximum stress intensity factors of each node at the front edge of the crack is equal to the fracture toughness; and determining the remaining life of the coupler body according to the cyclic loading frequency required by single crack propagation obtained by repeating the steps each time, the frequency of the load spectrum and the service kilometer corresponding to the load spectrum. The method and the device for determining the remaining life ofthe car coupler body can accurately evaluate the remaining life of the car coupler body after the car coupler body cracks.

Description

technical field [0001] The invention relates to railway transportation, in particular to a method and device for determining the remaining life of a coupler body. Background technique [0002] With the in-depth research on the fatigue life of structures, the damage tolerance method has been gradually applied to the remaining life prediction of engineering structures. The coupler coupler body is a key load-bearing part of a railway freight car. Accurately grasping the remaining life of the coupler has great engineering practical value for optimizing the maintenance strategy of the coupler and improving the service life of the structure. At present, there are few methods for predicting the remaining life of the coupler body after cracks appear, and there is a lack of a complete set of theory and methods for predicting the remaining life of the coupler. At present, because it is impossible to accurately understand the remaining service life of the coupler body after the cracks...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/17G06F2119/06
Inventor 王洪昆王文刚卢宇星康凤伟李权福边志宏王蒙方琪琦王萌刘洋杨海宾
Owner CHINA SHENHUA ENERGY CO LTD
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