Fault tree analysis of single cylinder vertical diesel engine through Intuitionistic Tetradecagonal fuzzy numbers

2020 ◽  
Author(s):  
N. Jose Parvin Praveena ◽  
M. U. Jayanth Sastri ◽  
I. Paulraj Jayasimman
Keyword(s):  
Diesel Engine ◽  
Fuzzy Numbers ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Tree Analysis ◽  
Single Cylinder

scholarly journals ANALISA PENYEBAB TINGGINYA SUHU GAS BUANG DUAL FUEL DIESEL ENGINE DENGAN METODE FAULT TREE ANALYSIS

2018 ◽  
Vol 9 (1) ◽  
pp. 2137-2150
Author(s):  
Nono Sukirno ◽  
Dwi Prasetyo ◽  
Moh. Aziz Rohman
Keyword(s):  
Diesel Engine ◽  
Natural Gas ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Dual Fuel ◽  
Gas Oil ◽  
Tree Analysis ◽  
Instruction Manual ◽  
Methane Gas

Dual Fuel Diesel Engine (Mesin Bahan Bakar Ganda) merupakan mesin denganpemanfaatan dua bahan bakar dalam proses pembakarannya untuk memperoleh tenaga kerjapada mesin. Jenis bahan bakar yang digunakan meliputi bahan bakar Methane Gas (CH4)dan MGO (Marine Gas Oil). Methane (CH4) dihasilkan dari Vapour Cargo Tank LNG(Liquified Natural Gas). Tujuan dari penelitian ini adalah untuk mengetahui apa sajapenyebab tingginya suhu gas buang terhadap kinerja Dual Fuel Diesel Engine di MV.Tangguh Palung dengan menggunakan metode analisis data Fault Tree Analysis. Darianalisis data penelitian di hasilkan beberapa rumusan masalah yaitu, faktor-faktor yangdapat menyebabkan tingginya suhu gas buang pada Dual Fuel Diesel Engine adalahkurangnya suplai udara pembakaran dalam ruang pembakaran mesin, komposisipembakaran yang tidak sesuai antara bahan bakar minyak dan gas, serta suhu Engine Roomyang terlalu panas. Dampak yang di timbulkan adalah kerusakan pada komponen-komponenpermesinan dan penurunan kinerja dari Dual Fuel Diesel Engine. Untuk mengatasipenurunan kerja pada Dual Fuel Diesel Engine adalah dengan melaksanakan perawatan danperbaikan pada setiap komponen permesinan yang mengalami masalah dan kerusakan sesuaidengan Running Hours dan Instruction Manual Book.

Risk Assessment on Fuzzy Fault Tree Analysis for Power Transmission Line Field Maintenance Work

2014 ◽  
Vol 1044-1045 ◽  
pp. 412-416 ◽  
Author(s):  
Zhi Hui Li ◽  
Qin Xiang Gao ◽  
Jie Hui
Keyword(s):  
Transmission Line ◽  
Fuzzy Numbers ◽  
Power Transmission ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Power Transmission Line ◽  
Line Field ◽  
Tree Analysis ◽  
Fuzzy Fault Tree Analysis ◽  
Maintenance Work

This paper introduces a fault tree (FT) method based on fuzzy numbers, aiming to deal with the inadequate statistics and the uncertain probability of the basic events during the fault tree analysis for power transmission line field maintenance work. Based on expert judgment, the Delphi method is used to transform fuzzy language to triangular fuzzy numbers, finally an approach for defuzzification is developed. A typical hazard in replacing the linear composite insulator of 500kV transmission line field maintenance work is presented for a case study. The method is conducive to a better risk pre-control and decision-making.

scholarly journals Fault Tree Analysis and Failure Diagnosis of Marine Diesel Engine Turbocharger System

2020 ◽  
Vol 8 (12) ◽  
pp. 1004
Author(s):  
Vlatko Knežević ◽  
Josip Orović ◽  
Ladislav Stazić ◽  
Jelena Čulin
Keyword(s):  
Diesel Engine ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Failure Diagnosis ◽  
Propulsion Systems ◽  
Air Filter ◽  
Tree Analysis ◽  
Marine Propulsion ◽  
Marine Diesel ◽  
Maintenance Plan

The reliability of marine propulsion systems depends on the reliability of several sub-systems of a diesel engine. The scavenge air system is one of the crucial sub-systems of the marine engine with a turbocharger as an essential component. In this paper, the failures of a turbocharger are analyzed through the fault tree analysis (FTA) method to estimate the reliability of the system and to predict the cause of failures. The quantitative method is used for assessing the probability of faults occurring in the turbocharger system. The main failures of a scavenge air sub-system, such as air filter blockage, compressor fouling, turbine fouling (exhaust side), cooler tube blockage and cooler air side blockage, are simulated on a Wärtsilä-Transas engine simulator for a marine two-stroke diesel engine. The results obtained through the simulation can provide improvement in the maintenance plan, reliability of the propulsion system and optimization of turbocharger operation during exploitation time.

Application of Fuzzy Fault Tree Analysis in Aero-Engine

2014 ◽  
Vol 602-605 ◽  
pp. 857-861 ◽  
Author(s):  
Feng Ding ◽  
Jun Qiang Dang ◽  
Jiu Cheng Yin
Keyword(s):  
Fuzzy Numbers ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Case Analysis ◽  
Fuzzy Probability ◽  
Positive Role ◽  
Tree Analysis ◽  
Fuzzy Fault Tree Analysis ◽  
Aero Engine ◽  
Fault Source

In view of the situation that the traditional fault tree is difficult to determine the probability of the basic events without considering the inherent uncertainly and imprecision of each basic event, the concept of fuzzy set is introduced which transforms various kinds of fuzzy numbers into triangular fuzzy ones to describe the probability of bottom events. Blurred the probability of the basic events in traditional fault tree, then the established fault tree is calculated and analyzed quantitatively, the fuzzy probability of top event of aero-engine can be gotten. The probability importance degree of each basic event under different sets is calculated and sorted for positioning the fault source precisely. Finally, the bottom events with higher probability will be obtained. The case analysis results show that the method gives a direct guiding significance for fault diagnosis of aero-engine, but also has a positive role for improving the reliability of the system.

scholarly journals Evaluation of the Main Causes of Diesel Engine Injector Failure using Fault Tree Analysis

2021 ◽  
Vol 17 (4) ◽  
pp. 23-35
Author(s):  
Hanan B. Matar ◽  
Sawsan S. Al-Zubaidi ◽  
Luma A. Al-Kindi
Keyword(s):  
Diesel Engine ◽  
Fault Tree ◽  
Fault Tree Analysis ◽  
Industrial Sector ◽  
Plant Management ◽  
Tree Analysis ◽  
Undesirable Event ◽  
Engine Part ◽  
Calculated Probability ◽  
Logical Representation

This paper is based on the application of the root cause analysis principle of diesel engine injector failure in diesels Haditha station. The maintenance of the diesel engine injector contains many problems that lead to the injector stopping; several reasons lead to such Problems. Fault tree analysis (FTA) is one of the most widely used methods in the industrial sector to perform reliability analysis of complex engineering systems. A fault tree is a logical representation of the relationship of primary/basic events that lead to a given undesirable event (i.e., top event). This research aims to present the (FTA) technology and how to use it in analyzing the causes of problems that lead to the injector stop working, and how to calculate the probability of occurrence of such problems. Implementation of FTA based on the probabilities of the causes under the top event and canalization lead to the calculated probability value (0.80). The plant management can define a specific plan to reduce these problems, because failure of an important engine part (injector) with such a large value leads to long downtime hours compared to operating hours.

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