Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지

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

선박용 4행정 디젤엔진의 크랭크축 강도해석에 관한 연구

  • 이돈출 (목포해양대학교 기관시스템공학부) ;
  • 강대선 (선박검사기술협회 기술연구소)
  • Published : 2006.05.01
Download PDF
⟨ Previous Next ⟩

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

References

  1. IACS, 'Calculation of Crankshafts for I.C(Internal Combustion).', IACS UR M53, Dec. 2004
  2. Y. Hanawa, S. Kajihara, H. Mori and T. Hamada, 'Development of high strength cast steel for semi-built up type crankshaft, and stress measurement and evaluation of crankshaft of low speed diesel engine.', CIMAC 24th conference, paper No 75, 2004
  3. Erik Sandberg, 'Some classification on crankshafts.', CIMAC 24th conference, paper No 13, 2004
  4. I. Sugimoto, S. Baba, M Yatsuo and H. Tanaka, 'Development of the criteria for crankshaft alignment in large 2-stroke marine diesel engines.', CIMAC 23rd conference, 2001
  5. S. Homori, K Kamada and Y Sasaki, 'Comprehensive evaluation of the vibration and strength of long-stroke diesel engine crank shaftings.', CIMAC 19th conference, 1991
  6. H. Okamura and T. Morita, 'Efficient modelling and analysis for crankshaft three-dimensional vibrations under firing conditions.', IMechE K0089, 1999
  7. M. Kushwaha, S. Gupta, P. Kelly and H. Rahnejat, 'Elasto-multi-body dynamics of a multicylinder internal combustion engine.', IMechE K01902, 2002
  8. Zissimos P and P. Mourelatos, 'A crankshaft system model for structural dynamic analysis of internal combustion engines', Computer and Structures 79 pp2009-2027, 2001 https://doi.org/10.1016/S0045-7949(01)00119-5
  9. Mustapha Lahmar, Djamel Frihi and Daniel Nicolas, 'The effect of misalignment on performance characteristics of engine main crankshaft bearings', European Journal of Mechanics A/Solids 21 pp703-714 Computer and Structures 79 pp703-714,
  10. E. Zahavi with V. Torbilo, Fatigue design, Life Expectancy of Machine Parts, A Solomon Press Book, 1996
  11. R. E. Peterson, Stress concentration factors, A wiley-interscience publication, 1974
  12. DIN743-1/2/3, Load-carrying of shafts, axles, pin(Part 1: Introduction, calculation, Part 2: Stress concentration factors and fatigue notch factors, Part 3:Material strength diagram)
  13. Daryl L. Logan, A first course in the Finite Element Method(Third edition), Brooks/Cole, 2002
  14. 문덕홍.전효중, “삼연속모멘트정리의 매트릭스법에 의한 박용추진축계 배치계산에 관한 연구”, 한국박용기관학회지(한국마린엔지니어링학회) 제5권 제1호, pp.20-27, 1981
  15. 선박검사기술협회, 선박용 디젤엔진의 크랭크축 강도해석에 관한 연구, 선박검사기술협회, 2006