선박의 수직방향 진동 감쇠를 위한 진동보상기의 개발
Development of Vibration Compensator for Vertical Vibration Damping of Ships
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
The aim of this study is to develop a vertical vibration compensator that attenuates the vertical vibration of ships. The vibration compensator was designed according to the principle of generating vertical excitation forces by rotating two eccentric bodies of the same mass in opposite directions at the same rotational speed. In addition, the structural stability was analyzed using the finite element method. The maximum stress in the drive shaft was 95.6 MPa, which was approximately 35% of the allowable stress of the shaft material (SM45C, 270 MPa). The acceleration signals of the vibrator compensator body and the testbed were determined to evaluate the efficiency of the vibration compensator and the designed excitation forces. Subsequently, the excitation forces were estimated based on the relationship between force and acceleration. The estimated results were very close to the theoretical values with an error of less than 3%.
Abstract
The aim of this study is to develop a vertical vibration compensator that attenuates the vertical vibration of ships. The vibration compensator was designed according to the principle of generating vertical excitation forces by rotating two eccentric bodies of the same mass in opposite directions at the same rotational speed. In addition, the structural stability was analyzed using the finite element method. The maximum stress in the drive shaft was 95.6 MPa, which was approximately 35% of the allowable stress of the shaft material (SM45C, 270 MPa). The acceleration signals of the vibrator compensator body and the testbed were determined to evaluate the efficiency of the vibration compensator and the designed excitation forces. Subsequently, the excitation forces were estimated based on the relationship between force and acceleration. The estimated results were very close to the theoretical values with an error of less than 3%.
참고문헌 (10)
- 배용채, "대형 디젤엔진의 진동 분석과 저감", 대한기계학회논문집 B, 35(10), pp.1047~1052 (2011), 대한기계학회
- S. Y. Ahn, "Probabilistic Analysis of Coupled Axial and Torsional Vibration of Marine Diesel Propulsion Shafting System", J. Soc. Nav. Archit. Korea, 35(3), pp.71~78 (1998)
- K. Y. Chung, "Recent ship vibrations and initial control measures", J. Soc. Nav. Archit. Korea, 27(2), pp.107~119 (1990)
- J. D. Yu, "Vibration Characteristics and Countermeasures on the Two Stroke Low Speed Diesel Engines", J. Korean Soc. Mar, 27(2), pp.174~180 (2003)
- 구동식, "선체에서 발생하는 진동과 소음의 진단 및 평가", 한국마린엔지니어링학회지, 32(1), pp.42~49 (2008), 한국마린엔지니어링학회
- S. M. Lee, "Control of Deckheuse Vibration of a Container Ship due to Higher Order Inertial Excitation of Main Engine", Trans. Korean Soc. Noise Vib. Eng, 2000(1), pp.876~880 (2000)
- J. G. Park, "Optimization of Excitation Forces Produced by the Diesel Engine for Vibration Control in Ships", Trans. Korean Soc. Noise Vib. Eng, 2003(11), pp.1018~1025 (2003)
- D. S. Cho, "A Study to Develop an Active Control System of Ship Vibration Using a Mechanical Actuator", J. Soc. Nav. Archit. Korea, 32(4), pp.105~113 (1995)
- N. Anekar, "Design and Testing of Unbalanced Mass Mechanical Vibration Exciter", Int J Res Eng Technol, 3(8), pp.107~112 (2014)
- S. S. Rao, "Mechanical Vibrations" (2012), Pearson