Abstract

This study first examines the minimum power requirements of a tanker according to the IMO 2013 IMO. 2013. Interim guidelines for determining minimum propulsion power to maintain the maneuverability in adverse conditions. London: International Maritime Organization. [Google Scholar] Interim Guideline (IMO 2013 IMO. 2013. Interim guidelines for determining minimum propulsion power to maintain the maneuverability in adverse conditions. London: International Maritime Organization. [Google Scholar]). For the estimation of the added resistance in waves a recently introduced semi-empirical method is used. Secondly, the influence of the increase in surface roughness of the hull and propeller due to fouling is investigated, reflecting the actual condition of a ship in service. The results show that even if ships are fulfilling the IMO 2013 IMO. 2013. Interim guidelines for determining minimum propulsion power to maintain the maneuverability in adverse conditions. London: International Maritime Organization. [Google Scholar] Guideline, they may become unsafe in operation. Lastly, the uncertainties involved in the assessment procedure are discussed. The investigation conducted is particularly of interest for the assessment of the safety of ships now being idle or used as floating storage due to the impact of the pandemic COVID-19 on the world economy, while they are expected to go again into service once the demand for transport recovers.

摘要

这项研究首先根据IMO 2013检查了油轮的最低功率要求海事组织。2013年。确定在不利条件下维持机动性的最小推进力的暂行准则。伦敦：国际海事组织。 [Google Scholar]临时指南（IMO2013海事组织。2013年。确定在不利条件下维持机动性的最小推进力的暂行准则。伦敦：国际海事组织。 [Google Scholar]）。为了估计波浪中的附加电阻，使用了最近引入的半经验方法。其次，研究了由于结垢而引起的船体和螺旋桨表面粗糙度增加的影响，反映了在役船舶的实际情况。结果表明，即使船舶符合IMO2013海事组织。2013年。确定在不利条件下维持机动性的最小推进力的暂行准则。伦敦：国际海事组织。 [Google Scholar]准则，它们可能会在操作中变得不安全。最后，讨论了评估程序中涉及的不确定性。进行的调查对于评估由于COVID-19大流行对世界经济造成的影响而目前正在闲置或用作浮动仓库的船舶的安全性尤其有意义，而预计一旦需求，它们将重新投入使用。运输恢复。