DOI QR코드

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A Study on the Measurement and Analysis of Whirling Vibration Behavior of Marine Propulsion Shafting System using Gap-sensors

  • Sun, Jin-Suk (DNV GL) ;
  • Han, Tae-Min (Samgong Co., Ltd.) ;
  • Lee, Kang-Ki (Department of Offshore Plant Managements, Korea Maritime Ocean University) ;
  • Kim, Ue-Kan (Division of Mechanical and Energy Systems Engineering, Korea Maritime and Ocean University)
  • 투고 : 2014.11.06
  • 심사 : 2015.01.02
  • 발행 : 2015.02.28

초록

Recently, as a result of the application of large and multi-blade propellers with high efficiency for large vessels, the vertical bending stiffness of propulsion shafting system tends to be declined. For some specific vessels, the shaft arrangement leads to the forward stern tube bearing to be omitted, decreasing vertical bending stiffness. In this respect, decreased vertical bending stiffness causes the problem which is the blade order resonance frequency to be placed within the operational rpm range of propulsion shafting system. To verify whirling vibration, the measurement should be carried out covering from operating rpm up to target rpm, however, the range is un-measurable generally. In order to resolve the measurement issue, this study shows the measuring method and the assessment method of relevant natural frequency of whiling vibration by using measured harmonic order component of whirling vibration.

키워드

참고문헌

  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. H. J. Jeon, Whirling Vibration Problem for Propulsion Shafting System, Korea Ship Safety Technology Authority Report, 7th Edition, Korea Maritime & Ocean University, Korea, 2001.
  5. H. J. Jeon, Ship Propulsion Transmission Equipment, Taehwa Publishing Company, 1986

피인용 문헌

  1. Theoretical and experimental analysis of the lateral vibration of shafting system using strain gauges in 50,000-DWT oil/chemical tankers vol.40, pp.4, 2016, https://doi.org/10.5916/jkosme.2016.40.4.301
  2. 50,000 DWT 유조선의 밸러스트 흘수에서 우현 전타시 과도상태가 프로펠러축 거동에 미치는 영향 연구 vol.26, pp.4, 2015, https://doi.org/10.7837/kosomes.2020.26.4.412
  3. Effects of Ship Propulsion Shafting Alignment on Whirling Vibration and Bearing Temperature Response vol.2021, pp.None, 2021, https://doi.org/10.1155/2021/8353844