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A health monitoring method of crane structure based on residual stress distortion rate

A technology of residual stress and health state, applied in the testing of machine/structural components, force/torque/power measuring instrument, measuring force, etc., can solve the problems of low detection efficiency, low accuracy, complex damage mechanism of cranes, etc. Achieve the effect of improving accuracy and efficiency and avoiding limitations

Active Publication Date: 2021-06-01
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many methods for monitoring the health status of cranes, but most of them focus on the evaluation of the overall crane health status through the combination of a single stress and damage mechanics model. However, due to the complexity of the crane damage mechanism under actual working conditions, it is only possible to use macro indicators Safety monitoring will have many limitations, the accuracy is not high, and the detection efficiency is low

Method used

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  • A health monitoring method of crane structure based on residual stress distortion rate
  • A health monitoring method of crane structure based on residual stress distortion rate
  • A health monitoring method of crane structure based on residual stress distortion rate

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Embodiment 1

[0030] like figure 1 As shown, the method for monitoring the health state of the crane structure based on the residual stress distortion rate in this embodiment includes the following steps:

[0031] S1. Identify vulnerable areas of the crane structure:

[0032] Determine the common vulnerable areas of the crane structure based on experience, and mark the corresponding weld structure area, so as to facilitate the real-time acquisition of subsequent residual stress distribution;

[0033] S2. Real-time acquisition of residual stress in critical areas based on X-rays:

[0034] On the basis of S1, an X-ray residual stress measurement device is arranged for the common damage area to collect the residual stress values ​​in the X, Y, and Z directions of each damage area in real time, namely: σ riqx , σ riqy , σ riqz .

[0035] Then the three-dimensional residual stress is synthesized according to formula (1), and the real-time comprehensive residual stress value σ of each damage...

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Abstract

The invention discloses a method for monitoring the health state of a crane structure based on the residual stress distortion rate, comprising the following steps: S1, determining the easily damaged area of ​​the crane structure; S2, real-time acquisition of residual stress in key areas based on X-rays; S3, fixing the time Calculation of residual stress density of nodes; S4, calculation of residual stress distortion rate of fixed time nodes; S5, calculation of health status judgment of crane structure. The method has high detection accuracy and can realize the evaluation of the health status of the crane structure in real time and efficiently.

Description

technical field [0001] The invention relates to a crane structure state monitoring method, in particular to a crane structure health state monitoring method based on residual stress distortion rate. Background technique [0002] The safety production problem in the current industrial production is more and more strengthened, and the operation safety problem of the crane is more and more paid attention to by the society. Due to the large tonnage of the crane and the harsh working environment, a small fault may cause huge damage, so it is necessary and urgent to monitor the safety status of the crane structure in real time. There are many methods for monitoring the health status of cranes, but most of them focus on the evaluation of the overall crane health status through the combination of a single stress and damage mechanics model. However, due to the complexity of the crane damage mechanism under actual working conditions, it is only possible to use macro indicators Safety...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M99/00G01L5/00G01L1/25
CPCG01L1/25G01L5/0047G01M99/007
Inventor 朱林郭广明边义祥孙进吴多利
Owner YANGZHOU UNIV