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A Study on the Strength Analysis of Crankshaft for 4 Stroke Marine Diesel Engine  

Lee, D.C. (목포해양대학교 기관시스템공학부)
Kang, D.S. (선박검사기술협회 기술연구소)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.30, no.3, 2006 , pp. 359-368 More about this Journal
Abstract
The trend on marine diesel engine productions and refinements has led to a higher mean effective pressure and thermal efficiency. These resulted in increased maximum combustion pressure within the cylinder and vibratory torque in crankshaft. In view of this. the crankshaft should be able to withstand the dynamic stresses caused by load variations. Different factors including size, material and stress concentration factors should also be considered to ensure the reliability of the shafting system. As such, crankshaft must be designed and compacted within its fatigue strength. In this paper, the strength analysis of crankshaft Is carried out by: simplified method recommended by IACS(International Association Classification Societies) M53 and a detailed method with the crankshaft assumed as a continuous beam and bearing supported in its flexibility. The results of these two methods are then compared.
Keywords
Bending stress; Crankshaft; Marine diesel engine; Strength analysis; Shear force; Stress concentration factor; Torsional vibration stress;
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