Title:
DYNAMIC RELIABILITY EVALUATION METHOD FOR COUPLING FAULT OF MIDDLE TROUGH OF SCRAPER CONVEYOR
Document Type and Number:
WIPO Patent Application WO/2020/232825
Kind Code:
A1
Abstract:
Disclosed is a dynamic reliability evaluation method for a coupling fault of a middle trough of a scraper conveyor. The method comprises the following steps: step 1: defining data collection time points, collecting data samples of crack length, middle plate width, fracture toughness, yield strength and fatigue load of a middle trough of a scraper conveyor at different operation time points, and compiling statistics on first-four-moment probability information of the data samples; step 2: respectively defining, according to failure criteria of a fracture failure and a static strength failure of the middle trough of the scraper conveyor, performance functions of the two failure modes; step 3: establishing a probability distribution function of each failure mode on the basis of the first-four-moment probability information of the data samples of the middle trough of the scraper conveyor and by means of a moment-based saddle point approximation method, and calculating failure probabilities of the fracture failure mode and the static strength failure mode at different time points; step 4: constructing a dynamic probability correlation structure between the fracture failure mode and the static strength failure mode of the middle trough of the scraper conveyor by means of a dynamic copula function, thereby establishing a dynamic joint probability distribution function between the failure modes; and step 5: carrying out dynamic reliability evaluation on a coupling fault of the middle trough of the scraper conveyor in conjunction with the probability distribution function of each failure mode of the middle trough of the scraper conveyor and the dynamic joint probability distribution function and by means of a system reliability theory.
Inventors:
LU HAO (CN)
ZHU ZHENCAI (CN)
JIANG FAN (CN)
LI WEI (CN)
PENG YUXING (CN)
ZHOU GONGBO (CN)
SHEN GANG (CN)
WANG DAGANG (CN)
TANG YU (CN)
LI XIANG (CN)
ZHU ZHENCAI (CN)
JIANG FAN (CN)
LI WEI (CN)
PENG YUXING (CN)
ZHOU GONGBO (CN)
SHEN GANG (CN)
WANG DAGANG (CN)
TANG YU (CN)
LI XIANG (CN)
Application Number:
PCT/CN2019/097907
Publication Date:
November 26, 2020
Filing Date:
July 26, 2019
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
G06F17/00; G01M13/00
Foreign References:
| CN110288188A | 2019-09-27 | |||
| CN107832511A | 2018-03-23 | |||
| CN102945223A | 2013-02-27 | |||
| CN102801157A | 2012-11-28 | |||
| CN107704677A | 2018-02-16 | |||
| CN107291989A | 2017-10-24 | |||
| US20160283621A1 | 2016-09-29 | |||
| CN109766670A | 2019-05-17 |
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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