JOURNAL BROWSE
Search
Advanced SearchSearch Tips
A case study on the optimal shafting alignment concerning bearing stiffness for 10,100 TEU container carrier
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
A case study on the optimal shafting alignment concerning bearing stiffness for 10,100 TEU container carrier
Lee, Jae-Ung;
  PDF(new window)
 Abstract
Damages of the main engine aftmost bearing and the after stern tube bearing tend to increase due to misalignment. And as the shafting system becomes stiffer due to the large engine power, whereas the hull structure becomes more flexible due to optimization by using high tensile thin steel plates. And this is the reason that more sophisticated shaft alignments are required. In this study, the optimum shafting alignment calculation was carried out, considering the thermal expansion effect, exploiting the sensitivity index, which indicates the reasonable position of forward intermediate shaft bearing for shaft alignment. and as the main subject in this study, the elastic deformation on intermediate shaft and main engine bearings occurred by vertical load of shaft mass were examined thoroughly and analyzed allowable load of bearings, reaction influence numbers of all bearings. As the result, a reliable optimum shafting alignment was derived theoretically. To verify these results, they were referred to the engine maker`s technical information of main engine installation and being used shafting alignment programs of both Korean Register of Shipping and Det Norske Veritas, their reliability were reviewed.
 Keywords
Shaft alignment;Sensitivity index;Bearing stiffness;Reaction influence number;
 Language
Korean
 Cited by
 References
1.
R. Michel, "A quarter century of propulsion shafting design practice and operating experience in the U.S. Navy," Naval Engineers Journal, p. 153, 1959.

2.
H. C. Anderson and J. J. Zrodowski, "Co-ordinated alignment of line shaft, propulsion gear, and turbines," Society of Naval Architects and Marine Engineers, vol. 67, pp. 449-523, 1959.

3.
W. E. Lehr, "Considerations in the design of marine propulsion shaft system," Society of Naval Architects and Marine Engineers, vol. 67, p. 555, 1961.

4.
G. Mann, "Shipyard alignment of propulsion shafting using fair curve alignment theory," Naval Engineers Journal, vol. 77, no. 4, pp. 651-659, 1965. crossref(new window)

5.
Y. J. Lee, A Study on Hull Deflections Effecting the Ship's Propulsion Shafting Alignment, Ph.D. Dissertation, Department of Mechanical Engineering Graduate School, Korea Maritime University, Korea, 2006 (in Korean).

6.
American Bureau of Shipping, Guidance Notes on Propulsion Shafting Alignment, Houston, USA : American Bureau of Shipping, 2006.

7.
K. C. Kim and J. G. Kim, "A study on optimum shaft alignment analysis for VLCC," Proceedings of the Special Transactions of the Society of Naval Architects of Korea, pp. 134-137, 2005 (in Korean).

8.
Class NK, GUIDELINES ON SHAFTING ALIGNMENT, Japan, Class NK, 2006.

9.
H. J. Jeon, Ship Propulsion Transmission Equipment, Busna, Korea, Taehwa Publishing Company, 1986 (in Korean).

10.
C. O. Seo, A Study on the Optimal Shafting Alignment for Chemical Tanker of Medium Size, M.S thesis, Department of Marine System Engineering Graduate School, Korea Maritime and Ocean University, Korea, 2010 (in Korean).

11.
Korean Register of Shipping, SeaTrust-SHALI Shaft Alingment Program User Manual, Korea, 2009 (in Korean).