A Practical Speed Loss Prediction Model at Arbitrary Wave Heading for Ship Voyage Optimization
Artikel i vetenskaplig tidskrift, 2021

This paper proposes a semi-empirical model to predict a ship’s speed loss at arbitrary wave heading. In the model, the formulas that estimate a ship’s added resistance due to waves attacking from different heading angles have been further developed. A correction factor is proposed to consider the nonlinear effect due to large waves in power estimation. The formulas are developed and verified by model tests of 5 ships in regular waves with various heading angles. The full-scale measurements from three different types of ships, i.e., a PCTC, a container ship, and a chemical tanker, are used to validate the proposed model for speed loss prediction in irregular waves. The effect of the improved model for speed loss prediction on a ship’s voyage optimization is also investigated. The results indicate that a ship’s voyage optimization solutions can be significantly affected by the prediction accuracy of speed loss caused by waves.

Irregular waves

Speed loss

Arbitrary wave heading

Full-scale measurement

Added resistance due to waves

Voyage optimization


Xiao Lang

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Wengang Mao

Chalmers, Mekanik och maritima vetenskaper, Marin teknik

Journal of Marine Science and Application

1671-9433 (ISSN) 1993-5048 (eISSN)

Vol. 20 3 410-425

EcoSail - Miljövänlig och kunddriven Sailplan optimeringstjänst

Europeiska kommissionen (EU) (EC/H2020/820593), 2018-11-01 -- 2021-04-30.


Teknisk mekanik

Marin teknik

Sannolikhetsteori och statistik



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