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Steel wire rope safety life evaluation method based on normal distribution

A technology with normal distribution and safe life, applied in the field of wire rope operation safety assessment, which can solve the problems of changes in comprehensive degradation factors, no longer scientific or necessary, etc.

Active Publication Date: 2021-06-15
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the change of comprehensive degradation factors due to various reasons during the cyclic inspection period of the steel wire rope, the original inspection period of 12 months is no longer scientific or necessary.

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0019] The present invention proposes a kind of steel wire rope life assessment method based on normal distribution, and specific embodiment comprises the following steps:

[0020] Step 1: Use the historical detection and fracture data of steel wire ropes as initial data, and according to a large number of historical detection records in a larger area and the same field, determine the detection records of broken steel wire ropes of the same model, same service conditions, and same damage state as the original data, according to The last inspection of the wire rope and the record of the last inspection, determine the total failure probability of the wire rope at the last inspection and the last inspection and before.

[0021] Step 2: Based on the fact that the breaking life of the wire rope conforms to a normal distribution, use the average breaking life N 0 and the standard deviation Δ of the breaking life distribution and the current running time, calculate the failure probab...

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Abstract

The invention provides a steel wire rope safety life evaluation method based on normal distribution. The method comprises the following steps: taking the tensile force of the steel wire rope and a large number of historical detection records in a relatively large area and the same field as original data; proposing that the fracture lives of a large number of steel wire ropes conform to normal distribution, and solving the average fracture life and the standard deviation of fracture life distribution in the fracture area of the steel wire ropes; calculating the failure probability of the steel wire rope in the current detection period and the possible failure number of the steel wire rope through the standard deviation and the current operation time. By utilizing the tensile force, the normal industrial working tension and the average breaking life of the new steel wire rope, an index relationship between the endurance strength of the steel wire rope and the average breaking operation time is established, the influence on the breaking life of the steel wire rope and the influence on the failure probability of the steel wire rope when the working environment is changed can be analyzed and discussed, and the relationship between the safety life and the fracture life of the steel wire rope is analyzed. The evaluation method is practical, novel, reasonable and effective.

Description

technical field [0001] The invention relates to the field of steel wire rope operation safety evaluation, in particular to a method for evaluating the safety life of steel wire ropes based on normal distribution. Background technique [0002] As the bearing and transportation parts of people or things, steel wire ropes are widely used in elevators, suspension bridges, cableways, cranes, mines, etc., and are the "lifeline" in the industrial field. Fatigue, corrosion, wear, broken wires and even fractures will occur during the use of steel wire ropes, resulting in a decline in its carrying capacity and reliability, which is directly related to the safety of people's lives and property. Therefore, it is very important to carry out non-destructive testing and life prediction for steel wire ropes, and ensuring the operation of steel wire ropes is a prerequisite for the sustainable development of related industries. [0003] With the economic fluctuations in recent years, the ind...

Claims

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Application Information

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IPC IPC(8): G06F17/18
CPCG06F17/18
Inventor 任尚坤陈冰华任仙芝
Owner NANCHANG HANGKONG UNIVERSITY