쌍축 추진 선박의 단독 타 고장 상태에서의 조종성능에 대한 수치적 연구
A Numerical Study on the Maneuverability of a Twin-screw Ship under Single Rudder Failure
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초록
Recently, ship owners have been requiring the assessment of the maneuverability of twin-screw ships under mechanical failures. Because this kind of assessment has not yet been conducted, it is necessary to study the types of machinery failures that can significantly affect the maneuverability of a ship, and to construct a procedure to simulate the maneuvering behavior under such failures. In this paper, the sole focus is the steering system failure from among the variety of failure types, and the maneuvering behavior of the ship under the single rudder failure is simulated for an investigation of the unique characteristics. First, the mathematical model for the twin-screw container ship is verified by comparing the simulated results for the 35˚ turning test, 10 ˚/10˚ zigzag test, and 20˚/20˚ zigzag test under the normal operating condition with those obtained from free running model tests. After the IMO maneuvering tests are additionally simulated under the single rudder failure, the results are reviewed to investigate the maneuvering characteristics that are due to the failure. Further, the 35°/35° zigzag test and the 35° turning test are simulated to additionally investigate the effects of the single rudder failure on the steering and turning abilities.
Abstract
Recently, ship owners have been requiring the assessment of the maneuverability of twin-screw ships under mechanical failures. Because this kind of assessment has not yet been conducted, it is necessary to study the types of machinery failures that can significantly affect the maneuverability of a ship, and to construct a procedure to simulate the maneuvering behavior under such failures. In this paper, the sole focus is the steering system failure from among the variety of failure types, and the maneuvering behavior of the ship under the single rudder failure is simulated for an investigation of the unique characteristics. First, the mathematical model for the twin-screw container ship is verified by comparing the simulated results for the 35˚ turning test, 10 ˚/10˚ zigzag test, and 20˚/20˚ zigzag test under the normal operating condition with those obtained from free running model tests. After the IMO maneuvering tests are additionally simulated under the single rudder failure, the results are reviewed to investigate the maneuvering characteristics that are due to the failure. Further, the 35°/35° zigzag test and the 35° turning test are simulated to additionally investigate the effects of the single rudder failure on the steering and turning abilities.
참고문헌 (9)
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