International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Uncertainty analysis of speed-power performance based on measured raw data in sea trials

  • Seo, Dae-Won (Department of Naval Architecure and Ocean Engineering, Kunsan National University) ;
  • Oh, Jungkeun (Department of Naval Architecure and Ocean Engineering, Kunsan National University)
  • Received : 2020.09.15
  • Accepted : 2021.04.06
  • Published : 2021.11.30
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Abstract

It is important to verify that the contracted speed-power performance of a ship is satisfied in sea trials. International Organization for Standardization (ISO) has published the procedure for measuring and assessing ship speed during sea trials. The results obtained from actual sea conditions inevitably include various uncertainty factors. In this study, double run tests were performed on one container ship to analyze the uncertainty of sea trial on three maximum continuous rating conditions. The uncertainty factors and scale of uncertainty were examined based on the measured raw data during sea trial. The results indicate that the expanded uncertainty for ideal power performance is approximately ±1.4% at 95% confidence level (coverage factor k = 2) and most of the uncertainty factors were because of the shaft power measurement system.

Keywords

Acknowledgement

This paper was supported by research funds of Kunsan National University and Ministry of Oceans and Fisheries (No. 20210631(KIMST), Development of Smart Port-Autonomous Ships Linkage Technology), Korea.

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