Dynamic reliability analysis of three nonlinear aging components with different failure modes characteristics

2013 ◽  
pp. 3047-3055 ◽  
Author(s):  
G Manno ◽  
A Zymaris ◽  
N Kakalis ◽  
F Chiacchio ◽  
F Cipollone ◽  
...  
Keyword(s):  
Reliability Analysis ◽  
Failure Modes ◽  
Dynamic Reliability

Dynamic reliability analysis of mechanical system with wear and vibration failure modes

2021 ◽  
Vol 163 ◽  
pp. 104385
Author(s):  
We Wang ◽  
Gang Shen ◽  
Yimin Zhang ◽  
Zhencai Zhu ◽  
Changyou Li ◽  
...  
Keyword(s):  
Mechanical System ◽  
Reliability Analysis ◽  
Failure Modes ◽  
Dynamic Reliability

Markov/CCMT Dynamic Reliability Analysis of the Main and Startup Feedwater Control System in Nuclear Power Plant

2017 ◽  
Author(s):  
Wentao Li ◽  
Danying Gu ◽  
Henan Zhang
Keyword(s):  
Control System ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Reliability Analysis ◽  
Nuclear Power ◽  
Failure Modes ◽  
Engineering Application ◽  
Dynamic Reliability ◽  
Mapping Technology ◽  
Cut Set

The dynamic reliability of the main and startup feedwater control system in nuclear power plant is evaluated by conducting the Markov Cell-to-Cell Mapping Technology (Markov/CCMT) methodology. All the equipment failure modes and potential failure states within the system are analyzed. This process illustrates the uncertainty in the physical process of the system. Furthermore, the failure probability and cut-set of the system can be computed to provide a more comprehensive and accurate response to the system characteristics and reflect the two types of interaction within the system. In contract to the traditional static Probability Safety Assessment (PSA), the Markov/CCMT methodology remedies the defect in terms of event sequence setting, control loop, multiple top event competition, uncertainty of the analysis result as well as the insufficient analysis of human-caused failure. The reliability analysis of the main and startup feedwater control system (FWCS) based on the self-developed Markov/CCMT reliability analysis software verifies the feasibility and engineering application value of the methodology and software.

scholarly journals A New Approach for Fatigue Reliability Analysis of Thin-Walled Structures with DC-ILSSVR

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3967
Author(s):  
Wenyi Du ◽  
Juan Ma ◽  
Changping Dai ◽  
Peng Yue ◽  
Jean W Zu
Keyword(s):  
Reliability Analysis ◽  
Failure Modes ◽  
Probabilistic Approach ◽  
Support Vector ◽  
Model Parameters ◽  
Service Reliability ◽  
Fatigue Reliability ◽  
Dynamic Reliability ◽  
Thin Walled Structures ◽  
Thin Walled

Fatigue analysis is of great significance for thin-walled structures in the spacecraft industry to ensure their service reliability during operation. Due to the complex loadings of thin-walled structures under thermal–structural–acoustic coupling conditions, the calculation cost of finite element (FE) simulations is relatively expensive. To improve the computational efficiency of dynamic reliability analysis on thin-walled structures to within acceptable accuracy, a novel probabilistic approach named DC-ILSSVR was developed, in which the rotation matrix optimization (RMO) method was used to initially search for the model parameters of least squares support vector regression (LS-SVR). The distributed collaborative (DC) strategy was then introduced to enhance the efficiency of a component suffering from multiple failure modes. Moreover, a numerical example with respect to thin-walled structures was used to validate the proposed method. The results showed that RMO performed on LS-SVR model parameters provided competitive prediction accuracy, and hence the reliability analysis efficiency of thin-walled pipe was significantly improved.

Markov/CCMT Dynamic Reliability Analysis of the Main and Startup Feedwater Control System in Nuclear Power Plant

2018 ◽  
Vol 4 (4) ◽  
Author(s):  
Wentao Li ◽  
Danying Gu ◽  
Henan Zhang
Keyword(s):  
Control System ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Reliability Analysis ◽  
Nuclear Power ◽  
Failure Modes ◽  
Engineering Application ◽  
Dynamic Reliability ◽  
Mapping Technology ◽  
Cut Set

The dynamic reliability of the main and startup feedwater control system in nuclear power plant is evaluated by conducting the Markov cell-to-cell mapping technology (Markov/CCMT) methodology. All the equipment failure modes and potential failure states within the system are analyzed. This process illustrates the uncertainty in the physical process of the system. Furthermore, the failure probability and cut-set of the system can be computed to provide a more comprehensive and accurate response to the system characteristics and reflect the two types of interaction within the system. In contrast to the traditional static probability safety assessment, the Markov/CCMT methodology remedies the defect in terms of event sequence setting, control loop, multiple top event competition, uncertainty of the analysis result, as well as the insufficient analysis of human-caused failure. The reliability analysis of the main and startup feedwater control system (FWCS) based on the self-developed Markov/CCMT reliability analysis software verifies the feasibility and engineering application value of the methodology and software.

Dynamic reliability analysis of a cantilever beam during a deterioration process

2018 ◽  
Vol 47 (1) ◽  
pp. 87-101 ◽  
Author(s):  
Wei Wang ◽  
Yanxun Zhou ◽  
Changyou Li ◽  
Hao Wang ◽  
Yimin Zhang
Keyword(s):  
Reliability Analysis ◽  
Cantilever Beam ◽  
Dynamic Reliability ◽  
Deterioration Process

scholarly journals Reliability Analysis of a Filtering Reducer under the Discrete Space Environmental Shocks

2014 ◽  
Vol 6 ◽  
pp. 921720 ◽  
Author(s):  
Jing Lu ◽  
Zhonglai Wang ◽  
Wei Chen ◽  
Xuefei Zhang ◽  
Hao Liu
Keyword(s):  
Differential Equations ◽  
Dynamic System ◽  
Mechanism Design ◽  
Reliability Analysis ◽  
Dynamic Model ◽  
Space Environment ◽  
Newmark Method ◽  
Lumped Mass ◽  
Dynamic Reliability ◽  
Environmental Shocks

Dynamic reliability analysis of a filtering reducer is performed by accounting for discrete shocks from the space environment. Gears are considered as the lumped mass and meanwhile the meshing between different gears is equivalent to a dynamic system consisting of springs and dampers during construction of the dynamic model. The Newmark method is employed to resolve differential equations, and then the additional acceleration could be obtained, caused by shocks to the filtering reducer. Dynamic reliability analysis is conducted with the help of the Simulink tool for the outputs. The results are hopefully useful for spacecraft mechanism design.

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