船舶主推进系统的可靠性分析及维修决策的研究-机械设计及理论专业论文.docx

江苏科技大学工学硕士学位论文 江苏科技大学工学硕士学位论文 II II III III Abstract Abstract The ship propulsion system is the power source of the whole ship. The security and reliability of the ship is the basic guarantee of ship which can make ship voyage normally, it also relates to safety of property and life safety of crew. So, the demand of the safety and reliability of ship main propulsion is higher and higher. We should detect fault quickly, precisely and efficiently, and finish the maintenance management, but the traditional ways of fault maintenance have not satisfied the requirements of reliability development, so, it is necessary to use advance mathematical method and computer technology associate with experience to research the main propulsion system. In this paper, base on the research of home and abroad, and development trend of the ship main propulsion system, introduces the basic structure of main propulsion of ship, analyzes the subsystem’s common fault of main propulsion, and grades the fault influence. Associates with common methods of reliability analysis—fault tree analysis, to analyzes the reliability of main propulsion device, and bases on the traditional fault tree analysis, examples the ship gear box, to research the fault tree reliability simulation, programming the calculation of reliability index, at the end, we get the unit importance, mode importance and reliability parameters, using VC++ and MATLAB mixing programming technology, realizes the analog output of reliability curve. At the research of maintenance decision of main propulsion system, focusing on the various maintenance method, and details the common decision-mode, and introduces the gray clustering decision-making methods using in the health status assessment of the ship’s main propulsion, in the end, chooses AHP as the main decision-mode of main prolusion, establishes the multiple attribute decision-mode and evaluation standard, to analyze the maintenance-decision of crankshaft, Finally, determines the be