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Method for monitoring the fatigue life of crane beams

A technology of crane beams and cranes, which is applied in the field of inspection, can solve the problems of difficult construction and high cost, and achieve the effect of increasing construction difficulty and cost

Active Publication Date: 2019-06-28
中冶检测认证(上海)有限公司 +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

As a result, the cost of monitoring is higher and the construction is more difficult

Method used

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  • Method for monitoring the fatigue life of crane beams
  • Method for monitoring the fatigue life of crane beams

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Embodiment Construction

[0021] 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 with reference to the accompanying drawings and examples.

[0022] The monitoring cost and construction difficulty increase with the increase of the number of crane girders and fatigue checking points, mainly because the monitoring must rely on the installation of stress-sensing sheets at each fatigue checking point of each crane girder. Thus, in one embodiment, this is avoided by eliminating the dependency of monitoring on the stress-sensitive sheet.

[0023] That is, this embodiment pre-establishes the functional relationship between the lifting weight, the running position and the stress amplitude for each fatigue checking point of each crane girder, because such a functional relationship can reflect that when the crane girder bears different load weights at different stress positions The stress amplitude for...

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Abstract

The invention discloses a method monitoring fatigue service life of a crane beam; the method comprises the following steps: recording position information of the crane beam; setting position information of fatigue checking computation points for the crane beam; setting up a corresponding stress amplitude function for each the fatigue checking computation point of the crane beam, wherein the stress amplitude function uses hoisting weight and walking position as input variables; using the corresponding stress amplitude function to calculate a stress amplitude formed on the fatigue checking computation point by a hoisting object in each walking process of the crane beam; converting the stress amplitude of the fatigue checking computation point of the crane beam into a stress amplitude cycle index indicating fatigue life. The method can monitor the fatigue service life of the crane beam without needing a stress induction sheet, so monitoring cost and construction difficulty cannot be obviously improved by increasing number of the crane beams and fatigue checking computation points.

Description

technical field [0001] The invention relates to detection technology, in particular to a method for monitoring the fatigue service life of a crane beam. Background technique [0002] The number of cycles of the stress amplitude of the crane beam at its fatigue checking point is an important parameter to measure its fatigue life. In order to obtain such parameters, it is necessary to lay out stress induction sheets at the fatigue checking point of the crane girder to measure the stress amplitude, and obtain the number of stress amplitude cycles by converting the stress amplitude. [0003] However, in a real environment, there may be multiple crane girders that need to be monitored for fatigue life at the same time, and, in order to make the monitoring results more accurate, the number of fatigue checking points for each crane girder is usually more than one. In this way, the number of stress-sensing sheets required for monitoring will increase with the number of crane girder...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50B66C6/00
Inventor 吴玉峰姜迎秋郑建华金立赞杨珏冷超群齐常军唐纪祥宁涛
Owner 中冶检测认证(上海)有限公司
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