• 대한조선학회논문집
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• 제42권4호
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• pp.341-349
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• 2005

With increasing demands of high speed transportation, recently a lot of high speed marine vehicles, such as SWATH, semi-planing craft, planing craft, hydrofoil craft, SES and so on, have been paid attention especially in high speed region over the Froude number 0.5. The resistance characteristics of the vehicles should be experimentally evaluated in the towing tank. At the Seoul National University, a light-weight cantilever type towing carriage was devised and installed in the towing tank. Wireless measurement devices were also provided for appropriate data acquisition during high-speed towing tests. With the new carriage system, a series of model tests were performed to investigate the hydrodynamic characteristics of a stepped planning hull in the towing tank and the resistance performances of the hull are introduced in this report.

• 대한조선학회논문집
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• 제51권5호
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• pp.349-355
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• 2014

The resistance test of a high speed craft such as planing ship is performed with a high speed towing carriage instead of ordinary towing carriage because of the speed limitation. In the resistance test using high speed towing carriage, the model ship is fixed to the carriage to restrain the running attitude for enough measuring time. Such method is called fixed model test method. In the fixed model test method, to get the appropriate running attitude, the model test is iteratively repeated until the trim moment and lift force are close to zero. In this research, trim free model test method is investigated to reduce the number of iteration. And, the limitation of towing speed range in the trim free model test method is investigated.

• 한국항해항만학회지
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• 제31권10호
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• pp.813-818
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• 2007

선박의 선형시험설비로는 회류수조, 예인수조 등이 있으나, 소형 고속선박은 실선 대응 모형선의 축적비가 대형선에 비해 매우 작고 수조의 유속과 예인전차의 속도제한으로 고속선의 설계선속까지의 성능검증에는 한계로 작용하였다. 이에, 고속 활주형선의 선형시험 검증을 위해 실 해상모형시험기법을 정립하였다. 한편, 고속 Stepped Hull선형은 일체형 활주형 선저선형에 비하여 고속 주행시 공기공급에 따른 접수면 감소로 인하여 저항감소에 따른 속도향상과 연비절감 효과가 있으나, 선미 좌우측의 접수면 감소에 따른 횡동요 안정성이 감소되는 경향이 있다. 이에, 본 논문에서는 고속 선형시험이 가능한 해상모형시험을 이용하여 선미 보조동체 장착 유무에 따른 고속 Stepped Hull 선형의 횡동요 및 저항특성을 비교, 분석한 것이다.