Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지
DOI QR코드

DOI QR Code

Optimum design of propulsion shafting system considering characteristics of a viscous damper applied with high-viscosity silicon oil

고점도 실리콘오일 적용 점성댐퍼 동특성을 고려한 추진축계 최적 설계

  • Kim, Yang-Gon (Korea Register of Shipping) ;
  • Cho, Kwon-Hae (Department of Offshore Plant Management, Korea Maritime and Ocean University) ;
  • Kim, Ue-Kan (Division of Mechanical Systems Engineering, Korea Maritime and Ocean University)
  • Received : 2016.10.12
  • Accepted : 2017.02.21
  • Published : 2017.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

The recently developed marine engines for propulsion of ships have higher torsional exciting force than previous engines to improve the propulsion efficiency and to reduce specific fuel oil consumption. As a result, a viscous damper or viscous-spring damper is installed in front of marine engine to control the torsional vibration. In the case of viscous damper, it is supposed that there is no elastic connection in the silicon oil, which is filled between the damper housing and inertia ring. However, In reality, the silicon oil with high viscosity possesses torsional stiffness and has non-linear dynamic characteristics according to the operating temperature and frequency of the viscous damper. In this study, the damping characteristics of a viscous damper used to control the torsional vibration of the shafting system have been reviewed and the characteristics of torsional vibration of the shafting system equipped with a corresponding viscous damper have been examined. In addition, it is examined how to interpret the theoretically optimal dynamic characteristics of a viscous damper for this purpose, and the optimum design for the propulsion shafting system has been suggested considering the operating temperature and aging. when the torsional vibration of the shafting system is controlled by a viscous damper filled with highly viscous silicon oil.

최근 개발된 선박용 주기관은 추진효율 향상과 연료소비율 저감기술이 요구됨에 따라 과거에 비해 높은 비틀림진동 기진력 특성을 갖고 있다. 따라서 이를 제어하기 위해 기본적으로 엔진 선단에 점성 댐퍼나 점성-스프링댐퍼를 장착한다. 점성댐퍼의 경우 댐퍼 내부에 채워진 실리콘 오일이 탄성적인 연결이 없다고 가정하고 댐퍼설계를 하여 왔으나 고점도 실리콘 오일은 높은 점도에 따른 비틀림 강성이 존재할 뿐만 아니라 작동온도와 주파수에 따라 비선형적인 동특성을 갖는다. 본 논문에서는 고점도 실리콘 오일이 적용된 점성댐퍼의 동특성을 확인하고 해당 댐퍼가 장착된 축계의 비틀림진동 특성을 검토하였다. 이를 위해 점성댐퍼의 최적 동특성을 이론적으로 해석하는 방법을 검토하였고, 고점도 실리콘 오일로 채워진 점성댐퍼로 해당축계의 비틀림진동 제어를 하는 경우 댐퍼 작동온도 및 경년변화를 고려한 추진축계 최적 설계 방안에 대해서 검토하였다.

Keywords

References

  1. Y. G. Kim, S. J. Hwang, J. S. Sun, S. G. Jung, and U. K. Kim, "A study on the effect of torsional vibration for propulsion shafting due to the characteristics of fuel saving marine engine," Proceedings of the 39th the Korean Society of Marine Engineering Fall Conference, p. 186, 2015 (in Korean).
  2. Y. G. Kim, S. J. Hwang, Y. H. Kim, K. H. Cho, and U. K. Kim, "A control of torsional vibration for propulsion shafting by optimum design of viscous damper applying silicon oil with high viscosity," Proceedings of the 40th the Korean Society of Marine Engineering Spring Conference, p. 172, 2016 (in Korean).
  3. C. K. Lee and H. J. Jeon, "A study on the design of the torsional vibration viscous damper for the crankshaft and developing of its performance simulation computer program," Journal of the Korean Society of Marine Engineering, vol. 13, no. 1, pp. 77-96, 1989 (in Korean).
  4. H. J. Jeon, Y. J. Kim, D. H. Kim, and U. K. Kim, "A study on the torsional vibration damper of the small internal combustion engine driving system (Part I) -Development of the optimum viscous-rubber damper-," Journal of the Korean Society of Marine Engineering, vol. 15, no. 2, pp. 44-52, 1991 (in Korean).
  5. T. E. Kim, A Study on the Torsional Vibration Characteristics and Control for the Shafting Systems with Middle and High Speed Diesel Engine, M.S. Thesis, Department of Mechanical Engineering, Korea Maritime University, Korea, 1999 (in Korean).
  6. D. C. Lee, A Study on the Vibration Control of the Engine Body and Shafting System for a Large Scale Diesel Engine," Ph.D. Dissertation, Department of Mechanical Engineering, Korea Maritime University, Korea, 1995 (in Korean).
  7. S. Iwamoto, "The development of the torsional vibration damper of viscous type with controllable elasticity effect," Journal of the Marine Engineering Society in Japan, vol. 15, no. 1, p. 19, 1973.
  8. Y. N. Park, C. W. Ha, U. K Kim, and H. J. Jeon, "A study on the stability analysis and non-linear forced torsional vibration for the engine shafting system with viscous damper," Proceedings of the Fall Conference of the Korean Society for Noise and Vibration Engineering, pp. 282-287, 1996 (in Korean).
  9. M. S. Lee, A Study on the Nonlinear Torsional Forced Vibration for the Engine Shafting Systems Modeled with Multi-Degree-of-Freedom, M.S Thesis, Department of Mechanical Engineering, Korea Maritime University, Korea, 1999 (in Korean).
  10. T. Kodama, K. Wakabayashi, Y. Honda, and S. Iwamoto, "Dynamic characteristics of viscous-friction dampers by simultaneous vibration displacement measurement at two points," SAE 2001 World Congress, SAE paper No.2001-01-0281(2001), pp. 1-12, 2001.
  11. T. KODAMA, K. WAKABAYASHI, Y. HONDA "An experimental study on the dynamic characteristics of torsional viscous-friction dampers for high-speed diesel engine -Relationship between damper clearance and kinematic viscosity of silicone fluid-," Japan Socirty of Mechanical Engineers, Dynamics and Design Conference 2001, 2001 (in Japanese).
  12. T. KODAMA, K. WAKABAYASHI, Y.HONDA, and S. IWAMOTO, "An experimental study on dynamic characteristics of torsional stiffness and torsional damping coefficient of viscous-friction damper," Transactions of the Kokushikan University, Faculty of Engineering, no. 35, pp. 67-79, 2002.
  13. Bohmeyer, Simulation Report, Hasse & Wrede, Germany, 2012.
  14. H. J. Jeon and U. K. Kim, Machine Dynamics, Hyo-sung publisher, 1999 (in Korean).
  15. H. J. Jeon and D. C. Lee, Vibration of Propulsion Shafting, Dasom publisher, 2003 (in Korean).
  16. T. Osamu and S. Suei, Mechanical Vibration Theory, Corona publishing co., ltd., 1951 (in Japanese).
  17. S. Maezawa, Vibration Engineering, Morikita publishing co., ltd. 1976 (in Japanese).
  18. W. K. Wilson, Practical Solution of Torsional Vibration Problems, vol. 1-5, Chapman & Hall, London, 1942.
  19. BICERA, Handbook of Torsional Vibration, Cambridge University Press., 1958.
  20. IACS, M68: Dimension of propulsion shafts and their permissible torsional vibration stresses, available at: http://www.iacs.org.uk, Accessed September 29, 2016.

Cited by

  1. Experimental Evaluation of Velocity-Dependent Behavior of Viscous Dampers Infilled with Silicone Gel vol.31, pp.4, 2017, https://doi.org/10.7781/kjoss.2019.31.5.331
  2. Experimental Evaluation of Steel Cable-Pulley-Bearing Complex Damping Systems with Silicone Viscous Damper vol.32, pp.4, 2020, https://doi.org/10.7781/kjoss.2020.32.4.247