Title:
RELIABILITY ASSESSMENT METHOD FOR MAIN SHAFT OF KILOMETER-DEEP WELL ELEVATOR UNDER MULTIPLE FAILURE MODES
Document Type and Number:
WIPO Patent Application WO/2018/214348
Kind Code:
A1
Abstract:
The present invention discloses a reliability assessment method for a main shaft of a kilometer-deep well elevator taking multiple failure modes into account. Firstly, a parameterized three-dimensional model of the main shaft is established according to the structure and size of the main shaft; secondly, a sampling matrix of a random variable of the main shaft is established according to a probability attribute of the random variable, and the finite element method is used to solve intensity and rigidity responses of the main shaft under the sampling matrix; further, an explicit function between the responses and the random variable matrix is established by using a neural network method, wherein explicit performance functions are respectively established under intensity failure and rigidity failure modes according to the intensity and rigidity design criteria; subsequently, two types of failure probabilities are calculated by using the saddle point approximation method; and finally, a joint failure probability model between the two failure modes is constructed by means of the Clayton copula function, and the interval reliability method is used to solve for system reliability in a joint failure state. The method takes probability correlation between intensity failures and rigidity failures into account and can be used to more accurately and reasonably assess system reliability of an elevator main shaft.
Inventors:
LU HAO (CN)
ZHU ZHENCAI (CN)
CAO GUOHUA (CN)
ZHOU GONGBO (CN)
LI WEI (CN)
PENG YUXING (CN)
SHEN GANG (CN)
WANG DAGANG (CN)
JIANG FAN (CN)
ZHU ZHENCAI (CN)
CAO GUOHUA (CN)
ZHOU GONGBO (CN)
LI WEI (CN)
PENG YUXING (CN)
SHEN GANG (CN)
WANG DAGANG (CN)
JIANG FAN (CN)
Application Number:
PCT/CN2017/102000
Publication Date:
November 29, 2018
Filing Date:
September 18, 2017
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
XUZHOU COAL MINE SAFETY EQUIPMENT MFT CO LTD (CN)
XUZHOU COAL MINE SAFETY EQUIPMENT MFT CO LTD (CN)
International Classes:
G06F17/50
Foreign References:
| CN104866647A | 2015-08-26 | |||
| CN105653890A | 2016-06-08 |
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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