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Crane structure health state monitoring method based on residual stress distortion rate

A technology of residual stress and state of health, applied in the testing of machine/structural components, force/torque/work measuring instrument, measuring force, etc., can solve the problems of low accuracy, low detection efficiency, complicated crane damage mechanism, etc. To avoid limitations, improve accuracy and efficiency

Active Publication Date: 2020-04-03
YANGZHOU UNIV
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  • Summary
  • 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

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  • Crane structure health state monitoring method based on residual stress distortion rate
  • Crane structure health state monitoring method based on residual stress distortion rate
  • Crane structure health state monitoring method 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 crane structure health state monitoring method based on a residual stress distortion rate. The crane structure health state monitoring method comprises the following steps: S1, determining an easily damaged area of a crane structure; S2, carrying out real-time acquisition on key area residual stress based on X-rays; S3, calculating the residual stress intensity of fixedtime nodes; S4, calculating the residual stress distortion rate of the fixed time nodes; and S5, calculating the judgment quantity of the health state of the crane structure. The method is high in detection precision, and the health state of the crane structure can be efficiently evaluated in real time.

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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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