Analysis of the correlation between instantaneous resistance-increase in waves and ship motion for reducing fuel consumption

Mohammad Hossein Ghaemi; Hamid Zeraatgar; Arash Bozorgmehr

doi:10.1080/17445302.2025.2452069

Analysis of the correlation between instantaneous resistance-increase in waves and ship motion for reducing fuel consumption

Abstract

Reducing fuel consumption is crucial for greening water transport. Wind, waves and currents affect fuel usage, with wave-induced resistance being significant. Typically, added resistance is estimated as the time average of resistance increase in waves over calm water. However, this average lacks real-time utility for engine adjustments. This study analyses time-series correlations between wave-induced resistance-increase and ship motions. Experiments using a KCS model show resistance oscillations can reach up to five times calm-water values. These oscillations are the first harmonic of the encounter frequency in long waves but exhibit multiple frequencies in short waves. Their amplitude follows a nonlinear trend: small in short waves, often large in medium waves and sometimes large in long waves. No clear amplitude trend emerges with wave height. A correlation between resistance increase and pitch motion is found in medium and long waves, underscoring the need for real-time control. These findings can guide strategies to optimise fuel use.

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Authors (3)

Mohammad Hossein Ghaemi (formerly: Mohammad Ghaemi) dr inż.
Hamid Zeraatgar prof.
- Amirkabir University of Technology
Arash Bozorgmehr
- Amirkabir University of Technology

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Category:

Articles

Type:

artykuły w czasopismach dostępnych w wersji elektronicznej [także online]

Published in:

Ships and Offshore Structures pages 1 - 14,
ISSN: 1744-5302

Language:

English

Publication year:

2025

Bibliographic description:

Ghaemi M., Zeraatgar H., Bozorgmehr A., Analysis of the correlation between instantaneous resistance-increase in waves and ship motion for reducing fuel consumption, Ships and Offshore Structures, 2025,10.1080/17445302.2025.2452069

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