Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
권호 표지
DOI QR코드

DOI QR Code

A Case Study of Abnormal Noise and Ultra-High Frequency Vibration Characteristics in the Propulsion Shaft Bearing of the Naval Vessel

함정 추진축계 베어링에서 발생하는 초고주파 진동 및 이상소음 특성 사례 연구

  • Suha Hwang (Defense Reliability Research Center, Defense Agency of Technology and Quality) ;
  • Soohong Jeon (Defense Reliability Research Center, Defense Agency of Technology and Quality) ;
  • Yonghoon Kim (Defense Reliability Research Center, Defense Agency of Technology and Quality) ;
  • Gahyang Lee (Defense Reliability Research Center, Defense Agency of Technology and Quality) ;
  • Deokjoo Kim (Defense Reliability Research Center, Defense Agency of Technology and Quality)
  • 황수하 (국방기술품질원 국방신뢰성연구센터) ;
  • 전수홍 (국방기술품질원 국방신뢰성연구센터) ;
  • 김용훈 (국방기술품질원 국방신뢰성연구센터) ;
  • 이가향 (국방기술품질원 국방신뢰성연구센터) ;
  • 김덕주 (국방기술품질원 국방신뢰성연구센터)
  • Received : 2025.03.11
  • Accepted : 2025.05.13
  • Published : 2025.08.05
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, abnormal noise and vibration occurring in the propulsion shaft system of a naval ship were measured, and the methods and procedures for the cause analysis based on the results were discussed. To investigate the cause, in this study, accelerometers were attached to the bearings supporting the shaft to measure the vibrations. The analysis revealed that the abnormal vibration on the port side was most strongly identified at the stern tube bearing, and it was confirmed that these vibrations exhibited ultra-high frequency(20,000 Hz ~) characteristics. Additionally, through DEMON analysis, it was confirmed that this characteristic appeared in synchronization with rotation of the shaft. In this paper, it is assumed that the cause of theses ultra-high frequency vibration has been generated by stress waves resulting from processes such as grinding, scratching and impact. Furthermore, directions for inspection of the stern tube bearing are proposed.

Keywords

Acknowledgement

이 연구는 해군본부로부터 지원받은 "24년 운용함정 소음진동 점검 연구용역"을 통해 얻어진 결과입니다.

References

  1. Sang Gu Lee, Sung Woong Kim, Jae Young Lee, Hyeon Ju Jeong, Dong Hun Kan, "A Cause Analysis Study on the Abnormal Vibration Characteristics of Diesel Engine Power Transmission System," Journal of the KNST, Vol. 5, No. 1, pp. 76-83, 2022. https://doi.org/10.31818/JKNST.2022.03.5.1.76
  2. Hae-Jin Park, Dong-Young Kim, Young-Ho Kim, "Verification of the cause of damage to the ship's stern tube," Journal of the Korea Academia-Industrial cooperation Society, Vol. 22, No. 12, pp. 419-426, 2021. https://doi.org/10.5762/KAIS.2021.22.12.419
  3. Chul-Oh Seo and Yong-Taek Joo, "A Study on Electrical Erosion of Thrust Bearing for Hybrid Propulsion System," Journal of the Power System Engineering, Vol. 28, No. 6, pp. 55-62, 2024. https://doi.org/10.9726/kspse.2024.28.6.055
  4. HyungSuk Han, KyoungHyun Lee, SungHo Park and SooHong Jeon, "Investigation for the Mechanism and Main Parameters of the Stick-slip Nonlinear Friction Induced Vibration in Water-lubricated Stern Tube Bearing," Trans. Korean Soc. Noise Vib. Eng., Vol. 28, No. 6, pp. 655-663, 2018. https://doi.org/10.5050/KSNVE.2018.28.6.655
  5. HyungSuk Han, Soohong Jeon, Chungwon Lee and Yonghoon Kim, "Analysis of the Abnormal Sound Caused by the Stick-slip Nonlinear Vibration Occurred Between Strut Bearing and Propulsion Shaft," Trans. Korean Soc. Noise Vib. Eng., Vol. 31, No. 1, pp. 13-23, 2021. https://doi.org/10.5050/KSNVE.2021.31.1.013
  6. HyungSuk Han, Soohong Jeon, Yonghoon Kim and Gahyang Lee, "Study on the Stick-slip Nonlinear Vibration of the Propulsion Shaft of a Naval Vessel when Starting and Stopping," Trans. Korean Soc. Noise Vib. Eng., Vol. 33, No. 3, pp. 289-295, 2023. https://doi.org/10.5050/KSNVE.2023.33.3.289
  7. Yonghoon Kim, Hyungsuk Han, Soohong Jeon, Cheongwon Lee, Dong-Nyok Lee and Sock-Kyu Lee, "Study on Simplification Method of DEMON analysis and Quantified Evaluation Indicator for CIS Judgement Using Cross Entropy," Trans. Korean Soc. Noise Vib. Eng., Vol. 31, No. 4, pp. 432-441, 2021. https://doi.org/10.5050/KSNVE.2021.31.4.432
  8. Hyungsuk Han, Soohong Jeon, Chungwon Lee, Dong-Nyok Lee, Yonghoon Kim and Sock-Kyu Lee, "Study for Monitoring of the Sound Pressure Level and Cavitation Inception Speed of the Propeller Using Acceleration Signal on the Hull," Trans. Korean Soc. Noise Vib. Eng., Vol. 31, No. 4, pp. 398-407, 2021. https://doi.org/10.5050/KSNVE.2021.31.4.398
  9. Qin Hongling, Yang Chang, Zhu Hefa, Li Xufei, Li Zhixiong, Xu Xiang, "Experimental analysis on friction-induced vibration of water-lubricated bearings in a submarine propulsion system," Ocean Engineering, Vol. 203, No. 107239, 2020.
  10. Zhang, N., He, L. and Yang, X., "Prediction and Analysis of Friction-induced Noise in Elastomeric Bearings," Proceedings of 24th International Congress on Sound and Vibration, Vol. 8, pp. 5932-5939, 2017.
  11. EMERSON, "High Frequency Vibration Analysis," White Paper, AMS 2140, 2017.