scholarly journals Reliability and availability assessment of diesel locomotive using Fault Tree Analysis

2016 ◽  
Vol 40 (4) ◽  
pp. 65-75 ◽  
Author(s):  
Maciej Szkoda ◽  
Grzegorz Kaczor
Keyword(s):  
Fault Tree ◽  
Fault Tree Analysis ◽  
Diesel Locomotive ◽  
Tree Model ◽  
Tree Analysis ◽  
Reliability Indices ◽  
Rail Vehicles ◽  
The Times ◽  
Availability Assessment ◽  
Reliability And Availability

The article presents an application of a method based on fault tree analysis and the Monte Carlo simulation in the assessment of reliability and availability of the rail means of transport. The primary target of the presented method is a cause and effect assessment of the occurrence of undesirable events, the determination of selected reliability indices and identification of the weakest components of rail vehicle that affect the downtime and technical availability most strongly. To illustrate the application of the presented method, the results of a project involving a 6Dg diesel locomotive, carried out in cooperation with the biggest Polish rail carrier, are shown. The assessment of availability and reliability was based on real operation data of a selected sample of seventy-five locomotives. Based on the collected data from the operation of the 6Dg locomotives, the times-to-failure and the times-to repair models were determined. A fault tree model of the locomotive was developed to assess the influence of the faults of the components on the reliability of the vehicle. A discrete simulation process allows to obtain a chosen characteristics and values of the selected measures, which – according to the authors – may be applied to assess the reliability and availability of the rail vehicles. Specialist software including Weibull++, BlockSim and MiniTab aided calculations were performed. The software includes and advanced solutions in the range of the reliability and availability simulations. The test results indicate that the proposed solution has a wide applicability potential.

The Application of Fault Tree Analysis in the Safety Performance of Cutter Suction Dredger

2013 ◽  
Vol 405-408 ◽  
pp. 3298-3301
Author(s):  
Yu Gang Zhou ◽  
Huan Min Xu
Keyword(s):  
Failure Probability ◽  
Land Reclamation ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Production Capacity ◽  
Product Configuration ◽  
Tree Model ◽  
Tree Analysis ◽  
Basic Probability ◽  
Key Events

Cutter suction dredgers (CSD) play a major part in the field of dredging engineering in harbors, fairways, and land reclamation. CSD can continuously mine and transport the slop with good quality while CSD can tackle many types of soil. However, even a component failure, which is connected with parts and components of CSD, can result in no working. Thus, it affects the production capacity and efficiency of dredgers seriously. It is necessary to analyze the failure probability of CSD. The method of Fault Tree Analysis (FTA) is applied to analyze the failure probability of CSD. The method uses logical reasoning and builds a fault tree model by analyzing the relationship between the basic, intermediate and top events. Based on fault tree model of a variety of events " and " " or " relationship, we can obtain minimal cut sets of that cause the event to failure. Then, get the basic probability of the event. Finally, we can calculate the probability of the top events. Under experiments, the FTA method can accurately calculate the failure probability of CSD, and deduce in reverse order the key events that cause the top event. The study on the key events can reduce the failure probability of CSD, enhance its reliability and safety, and improve the efficiency and productivity indirectly. It will also lay a foundation for product configuration optimization.

Domain Names Based on Fault Tree Analysis

2014 ◽  
Vol 667 ◽  
pp. 143-148
Author(s):  
Ning Zhang ◽  
Le Jun Chi ◽  
Hai Yan Xu
Keyword(s):  
Analytical Model ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Fault Model ◽  
Tree Model ◽  
Domain Name ◽  
Tree Analysis ◽  
Domain Names ◽  
Domain Name Server ◽  
Relationship Of

The success rate of domain name resolution has a direct influence on the service of DNS. Analytical performance of DNS server is the key to measure the satisfaction degree of users when they access to the network. This article establishes the dependence model for the domain name server. In order to get DNS fault model and analytical model, this article uses Fault Tree Analysis theory to describe the relationship of tree basic events and target events of fault tree of dependency. On the basis of fault tree model, dependencies of domain names are qualitative analyzed, including number of sets and element composition of fault model and analytical model. This study provided a theoretical basis for DNS dependencies and technical support for the DNS vulnerability analysis. It has a great importance for domain name system security.

Stress Management in Rock Drivage Team Based on Fault Tree Analysis Method

2014 ◽  
Vol 919-921 ◽  
pp. 873-877
Author(s):  
Ren Liang Shan ◽  
Shao Hua Dong ◽  
Bao Long Huang ◽  
Fei Huang ◽  
Shu Jing Wu ◽  
...  
Keyword(s):  
Stress Management ◽  
Effective Stress ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Analysis Method ◽  
Tree Model ◽  
Logical Relationship ◽  
Tree Analysis

In order to achieve effective stress management in rock drivage team, this paper use fault tree analysis method to build fault tree model for the stress management of rock borehole-blasting drivage team. Under this model, the stressor of rock drivage team is identified, the logical relationship between the stressor and work of errors in rock drivage team is analyzed, the corresponding recommendations for the stress management of coal companies are provided.

Fault Tree Analysis of Vehicle Charging System

2012 ◽  
Vol 588-589 ◽  
pp. 401-406 ◽  
Author(s):  
Jian Wei Ma ◽  
Wan Jian Yin ◽  
Jin Gang Ma ◽  
Qing Shan Ji
Keyword(s):  
Theoretical Basis ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Occurrence Probability ◽  
Analysis Method ◽  
Tree Model ◽  
Tree Analysis ◽  
Charging System ◽  
Vehicle Charging ◽  
And Function

The composition and function of vehicle charging system are analyzed, and basic theory of fault tree analysis method is introduced. The qualitative analysis of its reliability is carried out. Fault tree model of vehicle charging system is built, the minimum cut sets are solved and the key parts are found out. Through quantitative analysis, the occurrence probability of top event and importance of bottom event are solved, which provides theoretical basis for fault diagnoses of vehicle charging system, saves time of fault diagnoses and reduces unnecessary disassembly.

Safety Analysis of Tower Crane Based on Fault Tree

2012 ◽  
Vol 163 ◽  
pp. 66-69 ◽  
Author(s):  
Qing Wang ◽  
Li Xie
Keyword(s):  
Safety Management ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Control Measures ◽  
Human Beings ◽  
Tree Model ◽  
Tree Analysis ◽  
Construction Machinery ◽  
Tower Crane ◽  
Accident Tree

Tower crane are widely used in construction and installation in our country, especially in high-rise building, tower crane is indispensable construction machinery. But the tower crane accident happen high frequency. This essay based on the accident tree analysis methods, combined with tower crane accident type which establish accident tree model, and then resolve the minimal segmental sets, analysis the accident cause factor, According to the qualitative analysis and quantitative analysis of fault tree analysis, we can put forward some prevention ways and control measures to the tower crane accident in those aspects of unsafe actions of the human beings, insecure status of objects and the defects in safety management.

An Application of Fuzzy Fault Tree Analysis for Large and Medium-Sized Pumping Stations

2012 ◽  
Vol 170-173 ◽  
pp. 1977-1982
Author(s):  
Qiu Lin Cao ◽  
Xing Hua Wang
Keyword(s):  
Risk Analysis ◽  
Influencing Factors ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Tree Model ◽  
Tree Analysis ◽  
Minimal Cut Sets ◽  
Pumping Stations ◽  
Fuzzy Fault Tree Analysis ◽  
Probability Description

Risk analysis for large and medium-sized pumping stations was conducted by using the theory of fault tree. Model was established for fault tree analysis on running risk of pumping stations. Structural importance of minimal cut sets was analyzed and compared on the magnitude based on the probability description of fault tree given. Then the major influencing factors were identified and risk rating of pumping stations was discussed. In addition, appropriate countermeasures were provided for management. And application example was given.

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