Browse > Article
http://dx.doi.org/10.3744/SNAK.2005.42.5.479

Verification of Effective Support Points of Stern Tube Bearing Using Nonlinear Elastic Multi-Support Bearing Elements  

Choung, Joon-Mo (Hyundai Maritime Research Institute, Hyundai Heavy Industries Co., Ltd.)
Choe, Ick-Heung (Hyundai Maritime Research Institute, Hyundai Heavy Industries Co., Ltd.)
Kim, Kyu-Chang (Ship Building Division, Hyundai Heavy Industries Co., Ltd.)
Publication Information
Journal of the Society of Naval Architects of Korea / v.42, no.5, 2005 , pp. 479-486 More about this Journal
Abstract
The final goal of shift alignment design is that the bearing reaction forces or mean pressures are within design boundaries for various service conditions of a ship. However, it is found that calculated bearing load can be substantially variable according to the locations of the effective support points of after sterntube bearing which are determined by simple calculation or assumption suggested by classification societies. A new analysis method for shaft alignment calculation is introduced in order to resolve these problems. Key concept of the new method is featured by adopting both nonlinear elastic and multi-support elements to simulate a bearing support Hertz contact theory is basically applied for nonlinear elastic stiffness calculation instead of the projected area method suggested by most of classification societies. Three loading conditions according to the bearing offset and the hydrodynamic moment and twelve models according to the locations of the effective support points of sterntube bearings are prepared to carry out quantitative verifications for an actual shafting system of 8000 TEU class container vessel. It is found that there is relatively large difference between assumed and calculated effective support points.
Keywords
Elastic shaft alignment; Nonlinear elastic multi-support bearing elemen; Effective support point; Offset; Sterntube after bearing; Bearing reaction force; Relative slope;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 신장룡, 허기선, 허주호, 2002, '추진축계에 대한 VLCC 선체변형의 영향 평가,' 대한조선학회 선박설계연구회 논문집, pp 177-182
2 신장룡, 허주호, 2002, '선체변형이 추진축계에 미치는 영향,' 대한조선학회 추계학술대회 논문집, pp. 428-431
3 전효중, 1986, 선박동력 전달장치, 태화출판사
4 ABS, 2004, Guidance Notes on Propulsion Shafting Alignment
5 BV, 2003, Rules for the Classification of Ships, Pt.C Ch.1 Sec.7
6 DNV, 2003, Rules for Classification of Ships, Pt.4 Ch.4 Sec.1
7 DNV, 2004, Nauticus Machinery Calculation Package Manual
8 GL, 2002, Rules & Guidance, Part1 Chapter2 Section4
9 Hamrock, 1994, Fundamental of Fluid Film Lubrication, McGraw-Hill
10 Johnson, K.L., 1985, Contact Mechanics, Cambridge University Press, pp. 90-104
11 KozouseK, V.M. and Davies, P.G., 2000, 'Analysis and Survey Procedures of Propulsion Systems : Shaft Alignment' , LR Technical Association Paper No.5
12 KR, 2003, Rules for Classification Steel Ships, Part5 Chapter3 Section3
13 ABS, 2002, Shaft Alignment Program ShAL Manual
14 ABS, 2003, Rules for Building and Classing Steel Vessels, Part4 Chapter3 Section2
15 LR, 2002, Rules and Regulations for the Classification of Ships, Part5 Chapter8 Section1-2
16 NK, 2003, Rules for the Survey and Construction of Steel Ship, PartD Chapter6
17 Sekiuchi, M., Oishi. T., Tsuboi, T., Ueda, M., YoshiKi, T., Watanabe, T., Katoh, Y. and Komoto, M., 1974, 'Deflection of Engine Room Double Bottom in Large Tankers', Journal of Society of Naval Architect of Japan, Vol. 136, pp.325-336
18 정준모, 최익홍, 신상훈, 2004, '선체변형을 고려한 탄성 추진축계정렬 설계 및 해석,' 대한조선학회 추계학술대회 논문집, pp. 870-877
19 정준모, 최익흥, 2001, 309K DWT VLCC (1089 호선)의 선미구조 연성 및 축계정렬,HMRI-2000-11-R222