Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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A Study on Sea Trial Test Scenario for Estimation of Hydrodynamic Rotary Derivatives

선수동요 동유체마력 추정을 위한 시운전

  • Yoon, Hyeon-Kyu (Marine Transportation & Safety Research Department. MOERI/KORDI)
  • 윤현규 (한국해양연구원 해양운송안전연구본부)
  • Published : 2006.02.01
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Abstract

Free running model tests gives us only maneuvering indices not hydrodynamic derivatives. For this reason, system identification method has been applied to the measured data to identify mathematical model describing hydrodynamic force. However It is difficult to obtain complete set of maneuvering derivatives because of strong correlation of sway velocity and yaw rate. Therefore, in this paper, we assumed that sway velocity related coefficients would be obtained by oblique towing test. and then proposed new procedure to estimate yaw related coefficients. To do this, correlation and regression analyses were carried out to establish modified model and estimate maneuvering derivatives. Also D-optimal rudder input scenario was found based on the modified model and confirmed the validity of its sufficient richness as a input scenario.

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References

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