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Dynamic reliability assessment method for coupling fault of middle trough of scraper conveyor

A scraper conveyor, coupling fault technology, applied in the direction of conveyor, conveyor object, conveyor control device, etc., can solve the problems of inability to describe asymmetric probability-related properties, inability to apply small sample conditions, etc., to improve flexibility performance, improved accuracy, improved accuracy

Inactive Publication Date: 2019-09-27
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

This method realizes the construction of probability distribution by collecting a large number of samples, and solves the cumulative probability distribution by integral method, which cannot apply to the small sample condition
And the Frank copula function used cannot describe the asymmetric probability-related properties

Method used

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  • Dynamic reliability assessment method for coupling fault of middle trough of scraper conveyor
  • Dynamic reliability assessment method for coupling fault of middle trough of scraper conveyor
  • Dynamic reliability assessment method for coupling fault of middle trough of scraper conveyor

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Embodiment

[0060] In order to understand more fully the characteristics and engineering applicability of this invention, the present invention aims at such as figure 2 The structure of the middle trough of the scraper conveyor is shown, and the dynamic reliability evaluation of the coupling fault is carried out.

[0061] (1) Collect the data samples (crack length, middle plate width, fracture toughness, yield strength and fatigue load, etc.) of the fracture failure and static strength failure of the middle groove of the scraper conveyor at different time points, and obtain the first four samples of each sample. Moment probability information.

[0062] (2) According to the safety criteria of fracture failure and static strength failure of the middle trough of the scraper conveyor, respectively establish its reliability function function under fracture failure and static strength failure, namely

[0063] g 1 =K IC -K max

[0064] g 2 =Q-S

[0065] Among them, K IC is the fracture ...

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Abstract

The invention discloses a dynamic reliability assessment method for a coupling fault of a middle trough of a scraper conveyor. The approximation precision of the moment-based saddle point approximation method and the function attribute of the dynamic t-copula are fully utilized; the dynamic reliability evaluation method for the coupling fault of the middle trough of the scraper conveyor is provided, so that the dynamic correlation between failure modes of the middle trough of the scraper conveyor under the condition of small samples is described more accurately, and the accuracy of dynamic reliability evaluation of the coupling fault of the middle trough of the scraper conveyor is improved.

Description

technical field [0001] The invention relates to the technical field of mine transportation equipment, in particular to a method for evaluating the dynamic reliability of a coupling fault in a slot in the middle of a scraper conveyor. Background technique [0002] The development and utilization of deep resources is a national development strategy, and the scraper conveyor is the key equipment to realize the development of deep resources. Its safe and stable operation is of great significance to the realization of coal mining. Due to the complex operating conditions and extremely harsh working conditions of underground transportation equipment, the performance degradation process of equipment such as scraper conveyors is exacerbated, and the actual service life of the equipment is reduced. Therefore, it is of great significance to accurately and reasonably evaluate and predict the reliability of the key components of the scraper conveyor to ensure the safe operation of the eq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06F17/50G06F17/18G06F17/17
CPCG06Q10/0639G06F17/18G06F17/17G06F30/20B65G19/28G06F17/00B65G43/02B65G2203/0275B65G2812/02891
Inventor 卢昊朱真才江帆李伟彭玉兴周公博沈刚王大刚汤裕李翔
Owner CHINA UNIV OF MINING & TECH
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