Browse > Article
http://dx.doi.org/10.5916/jkosme.2016.40.4.301

Theoretical and experimental analysis of the lateral vibration of shafting system using strain gauges in 50,000-DWT oil/chemical tankers  

Lee, Jae-Ung (Korean Register)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.40, no.4, 2016 , pp. 301-306 More about this Journal
Abstract
During the initial stage of propulsion shaft design, the shaft alignment process includes a thorough consideration of lateral vibration to verify the operational safety of the shaft. However, a theoretical method for analyzing forced lateral vibrations has not been clearly established. The methods currently used in classification societies and international standards can only ensure a sufficient margin to avoid the blade-passing frequency resonance speed outside the range of ${\pm}20%$ of the maximum continuous rating (MCR) for the engine. Typically, in shaft alignment analyses, longer center distances between the support bearings promote affirmative results, but the blade order resonance speed can approach the lower limit for lateral vibration. Therefore, this matter requires careful attention by engineers, and a verification of the theoretical analysis by experimental measurements is highly desirable. In this study, both theoretical and experimental analyses were conducted using strain gauges under two draught conditions of vessels used as 50,000-DWT oil/chemical tankers, introduced recently as eco-friendly ships. Based on the analyses, the influence of the lateral vibration on the shafting system and the system's reliability was reviewed.
Keywords
Lateral vibration; Blade passing frequency; Strain gauge;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 E. Panagopulos, "Design-stage calculations of torsional, axial and lateral vibrations of marine shafting," Transactions of Society of Naval Architects and Marine Engineers, vol. 58, pp. 329-384, 1950.
2 N. H. Jasper, A Theoretical Approach to the Problem of Critical Whirling Speeds of Shaft-Disk Systems, DTMB Report 890, David Taylor Model Basin Washington D. C., America, 1954.
3 N. H. Jasper, A Design Approach to the Problem of Critical Whirling Speeds of Shaft-Disk Systems, DTMB Report 890, David Taylor Model Basin Washington D. C., America, 1954.
4 N. H. Jasper and L. A. Rupp, "An experimental and theoretical investigation of propeller shaft failures," The International Journal of Society of Naval Architects and Marine Engineers, Transaction, vol. 60, pp. 314-381, 1952.
5 H. J. Jeon and H. C. Kim, "Calculation of transverse vibration of Ship's Propulsion Shaftings by the Finite Element Method," Journal of the Korean Society of Marine Engineering, vol. 3, no. 1, pp. 2-18, 1979 (in Korean).
6 S. Y. Ahn and H. J. Jeon, "Calculation of the coupled free, transverse vibration of the multi-supported shaft system by transfer matrix method," Journal of the Korean Society of Marine Engineering, vol. 7, no. 1, pp. 49-63, 1983 (in Korean).
7 S. Y. Ahn, "Coupled transverse vibrations of propeller- shaft systems," Journal of the Society of Naval Architects of Korea, vol. 22 no. 2, pp. 38-44, 1985 (in Korean).
8 S. Y. Ahn, "Coupled free lateral vibration analysis of shafting by the finite element method," Journal of the Society of Naval Architects of Korea, vol. 23 no. 4, pp. 19-24, 1986 (in Korean).
9 K. T. Yu and H. J. Jeon, "A theoretical calculation of coupled free, tranverse vibration of the multi-supported shaft system by finite element method," Journal of the Korean Society of Marine Engineering, vol. 10, no. 4, pp. 41-49, 1986 (in Korean).
10 S. Y. Ahn, "On the lateral vibration of propeller shaft systems," Journal of the Korean Society of Marine Engineering, vol. 13, no. 1, pp. 13-23, 1989 (in Korean).
11 D. C. Lee, B. H. Park, and H. J. Jeon, "A study on the coupled forced lateral vibration of multi-supported shafting by the transfer matrix method," Journal of the Korean Society of Marine Engineering, vol. 14, no. 2, pp. 35-47, 1990 (in Korean).
12 Y. C. Kim and G. D. Lee, "A study on th whirling critical speeds of marine propeller shafts," Journal of the Society of Naval Architects of Korea, vol. 31, no. 2, pp. 29-37, 1994 (in Korean).
13 American Bureau of Shipping, Rules for Building and Classing Steel Vessels Pt 4 Ch3 Sec2, Propulsion Shafting 7.9, TX, USA: ABS, 2015.
14 J. N. Kim, H. Kwun, N. J. Park, S. Y. Song, and S. T. Choi, "Research on whirling vibration characteristics of propulsion shaft of ship with CPP," Proceedings of the Korean Society for Noise and Vibration Engineering 23st spring conference, pp. 879-881, 2013 (in Korean).
15 C. Y. Son, K. S. Lee, and Y. H. Ryu, "A study on the vibration characteristics of critical speed for rotor shaft," Journal of the Korean Society for Noise and Vibration Engineering, vol. 18, no. 9, pp. 961-971, 2008 (in Korean).   DOI
16 H. Kwun, Y. S. Han, and J. K. Eom, "Whirling vibration analysis & measurement of the propulsion shafting system of 1000p ro-ro ferry," Proceedings of the Korean Society for Noise and Vibration Engineering 11th spring conference, pp. 143-148, 2001 (in Korean).
17 J. H. Kim, J. S. Kim, T. U. Kim, and D. C. Lee, "Measurement and assessment of whirling vibration using strain gauge in small propulsion shafting system," Proceedings of the Korean Society for Noise and Vibration Engineering 21st spring conference, pp. 527-532, 2011 (in Korean).
18 J. S. Sun, T. M. Han, K. K. Lee, and U. K. Kim "A study on the measurement and analysis of whirling vibration behavior of marine propulsion shafting system using gap-sensors," Journal of the Korean Society of Marine Engineering, vol. 39, no. 2, pp. 130-135, 2015.   DOI
19 Korean Register(KR), Control of Ship Vibration and Noise, 3rd ed., Korea: Textbooks, 2014 (in Korean).
20 H. J. Jeon, Ship Propulsion Transmission Equipment, Busan, Korea: Taehwa Publishing Company, 1986 (in Korean).