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The Investigation of Assemblage Intensity and Mode for Marine Diesel Engine

Author: LiFei
Tutor: TangWenXian
School: Jiangsu University of Science and Technology
Course: Mechanical Manufacturing and Automation
Keywords: Marine Diesel Engine Block Assembly methods Strength Finite Element Method
CLC: U664.121
Type: Master's thesis
Year: 2010
Downloads: 48
Quote: 0
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Abstract


The diesel engine is an important part of one of the ship's diesel engine performance directly affects the safety of the ship traveling . The body as the body member of the diesel engine , its stiffness and dynamic properties is guaranteed to work properly an important prerequisite of the diesel engine . Body assembly sequence and crosshead guide assembly deformation has an important impact on the entire diesel engine performance in the design process must be carried out in-depth analysis and calculation , has a more accurate estimate , in order to improve and optimize the design reasonable , made satisfactory design effect . The finite element method is a numerical analysis method is a universal force study the complex structure is the most reliable and effective means . In this paper , a marine diesel engine block as the research object , using the finite element method to the whole body in the the four bolts pretension way case , analysis of the impact of the mechanical properties of the body ; and research in the bolt preload , and explosive action , stand , the mechanical properties of the rack . The treatment of the boundary conditions is an important part of the finite element analysis , which directly determines the solution accuracy . The paper uses the urging unit to simulate the preload of each of the connecting bolts , provided in the mating surfaces between the various parts at the same time a large number of contact elements, in order to obtain reasonable results . And then , using the finite element software specific post-processing module to identify the dangerous parts of the stress variation and the corresponding parts of the deformation data . Strength checking the results show that the static strength of all body components . Finally, the analysis by the middle to both sides of the taut, taut by both sides to the middle , from front to back turn taut and turn tensioning of four assembly on base , rack deformation from back to front . Draw a symmetrical assembly , the body's stress and the smaller displacement . The analysis concluded that the diesel engine assembly , the assembly is symmetrical assembly .

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CLC: > Transportation > Waterway transport > Marine Engineering > Ship machinery > Ship power plant > Internal combustion engine power plant > Diesel engine
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