한국소음진동공학회논문집 (Transactions of the Korean Society for Noise and Vibration Engineering)

  • 제23권9호
  • /
  • Pages.806-813
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  • 2013
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  • 1598-2785(pISSN)
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  • 2287-5476(eISSN)
한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
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선박 추진축계의 2절 비틀림진동에 기인한 주기관 X-모드 진동 현상의 연구

A Study on Main Engine X-mode Vibration Phenomenon due to 2nd Node Torsional Vibration of the Marine Propulsion System

  • Lee, Donchool (Marine Engineering Division, Mokpo National Maritime University) ;
  • Kim, Junseong (R&D Department D-I Industrial Co. Ltd.) ;
  • Kim, Jinhee (Environment & Plant Team, Korean Register of Shipping)
  • 투고 : 2013.06.04
  • 심사 : 2013.07.23
  • 발행 : 2013.09.20
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초록

For the past years, higher power rating 2 stroke super long stroke diesel engines having more than 8 cylinders and larger cylinder bore are installed mainly on very large containerships to save on fuel consumption. However, these engines are prone to X-mode vibration due to 2nd node torsional vibration or the X-type moment, particularly because of the increase in total length and height. Recently, cases of excessive X-mode vibration often occurred on engine's major components. This vibration is manifested also as secondary vibration causing failure in engine-mount large structures. This study investigated the excitations caused by the 2nd node propulsion shafting torsional vibration that influence X-mode vibration of the main engine and practical countermeasures are proposed. An 8RT-flex82T 8 cylinder engine and 11S90ME-C 11 cylinder engine for a container ship was used as research model.

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참고문헌

  1. Lee, D. C., Kim, U. K. and Jeon, H. J., 1996, Vibration Control on the Diesel Power Plant by the Phase Adjustment of Paralleled Engines' X-mode Vibration, Transactions of the Korea Society for Noise and Vibration Engineering, Vol. 6, No. 6, pp. 701-708.
  2. Kim, Y. W., Bae, Y. C., Bae, C. H. and Lee, Y. S., 2007, High Vibration Phenomena due to Cylinder Explosion Pressure of Low-speed Diesel Engine with 7 Cylinders installed on Land, Transactions of the Korea Society for Noise and Vibration Engineering, Vol 17, No. 9, pp. 826-834. https://doi.org/10.5050/KSNVN.2007.17.9.826
  3. MAN B&W, 1993, Vibration Characteristics of Two-stroke Low Speed Diesel Engine, P.9301-268.
  4. Lee, D. C. and Barro, R. D., 2009, A Study on the Torsional Vibration Characteristics of Super Large Two Stroke Low Speed Diesel Engines with Tuning Damper, Transactions of the Korea Society for Noise and Vibration Engineering, Vol. 19, No. 1, pp. 64-75. https://doi.org/10.5050/KSNVN.2009.19.1.064
  5. Korean Register of Shipping, 1997, Control of Ship Vibration and Noise, pp. 220-243.
  6. Lee, D. C., Joo, K. S., Nam, T. K., Kim, E. S. and Kim, S. H., 2009, Development of Engine Vibration Analysis and Monitoring System(EVAMOS) for Marine Vessels, Transactions of the Korea Society for Noise and Vibration Engineering, Vol. 19, No. 2, pp. 155-162. https://doi.org/10.5050/KSNVN.2009.19.2.155