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A study of the analysis of shaft alignment considering hull deflections for 50,000 DWT oil/chemical tankers
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 Title & Authors
A study of the analysis of shaft alignment considering hull deflections for 50,000 DWT oil/chemical tankers
Lee, Jae-Ung;
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 Abstract
The shaft system of a vessel becomes stiffer because of larger engine power, whereas the hull structure becomes more flexible because of scantling optimization conducted by using high-tensile thick steel plates. The draught-dependent deformation of the hull affects each bearing offset and reaction force comprising the subsequent shaft system. This is the reason that more sophisticated shaft alignments are required. In this study, an FE analysis performed under the expected operating conditions of two (2) vessels, as maximum draught change and to analyze the shaft alignment using the relative bearing offset change, which was derived from an FE analysis of the 50,000 DWT oil/chemical tanker, which has become an eco-friendly vessel in recent years. Based on this, the influence of the hull deflection on the bearing offset was reviewed against results for shaft alignment conditions.
 Keywords
Shaft alignment;Hull deflections;Finite elements method;Bearing offset calculation;
 Language
Korean
 Cited by
 References
1.
R. Michel, "A quarter century of propulsion shafting design practice and operating experience in the U.S. navy," Journal of the American Society for Naval Engineers, vol. 71, no. 1, pp. 153-164, 1959.

2.
H. C. Anderson and J. J. Zrodowski, "Co-ordinated alignment of line shaft, propulsion gear, and turbines," Annual meeting of the Society of Naval Architects and Marine Engineers, pp. 449-523, 1959. [Online]. available: http://www.sname. org/HigherLogic/System/DownloadDocumentFile.ash x?DocumentFileKey=51feb692-25ae-4b8b-bf4f-55bdea11ed48

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," The American Society of Naval Engineers Journal, vol. 77, no.1, pp. 117-133, 1965. crossref(new window)

5.
American Bureau of Shipping (ABS), Guidance Notes on Propulsion Shafting Alignment, Houston, USA : American Bureau of Shipping : ABS, 2006.

6.
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).

7.
H. J. Jeon, Ship Propulsion Transmission Equipment, Busna, Korea, Taehwa Publishing Company, 1986 (in Korean)

8.
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 University, Korea, 2010 (in Korean).

9.
J. U. Lee, A study on the Optimal Shafting Alignment Concerning Bearing Stiffness for Extra Large Container Carrier, M.S. Thesis, Department of Marine System Engineering Graduate School, Korea Maritime University, Korea, 2011 (in Korean).

10.
L. Shi, D. Xue, and X. Song, "Research on shafting alignment considering ship hull deformations," Marine Structures, vol. 23, no. 1, pp. 103-114, 2010. crossref(new window)

11.
J. M. Jung, I. H. Choe, and S. H. Shin, "A study on elastic shaft alignment using nonlinear bearing elements," Journal of the Society of Naval Architects of Korea, vol. 42, no. 3, pp. 259-267, 2005 (in Korean). crossref(new window)

12.
MAN B&W, "Bearing load measurement by jaking up", ID No. 07424-5, 2012.

13.
KR, Rules for the Classification of Steel Ships Part 5 Chaper 3 206, Busan, Korea, Korean Register, 2015.

14.
Class NK, GUIDELINES ON SHAFTING ALIGNMENT, Japan, Class NK, 2006.

15.
Korean Register of Shipping, SeaTrust-Machinery User Manual ver.1.0, Busan, Korea, 2013 (in Korean).