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Open AccessArticle

Numerical Simulation of Seakeeping Performance on the Preliminary Design of a Semi-Planing Craft

Department of Systems & Naval Mechatronic Engineering, National Cheng-Kung University, Tainan City 70101, Taiwan
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Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2019, 7(7), 199; https://doi.org/10.3390/jmse7070199
Received: 16 May 2019 / Revised: 22 June 2019 / Accepted: 24 June 2019 / Published: 27 June 2019
(This article belongs to the Special Issue Ship Hydrodynamics)
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Abstract

This study established a seakeeping program to evaluate the motion responses of a high speed semi-planing craft and to develop a database for future route planning. A series 62 mono-hull was chosen for the test cases, comparing seakeeping performances with full-scale on-board measurements. The statistical results were obtained using spectral analysis, which combines the International Towing Tank Conference (ITTC) spectrum with the response amplitude operator (RAO) responses of each wave heading for a given sailing speed. The speed polar diagram was made to illustrate five degree-of-freedom (DOF) motion responses between sailing speeds and wave heading angles in a particular sea state. Although the craft has different trim angles at high speeds (because of dynamic lift) under various loading and draft conditions, this study only investigated the trim angles of 0° (even keel), 1° by the stern, and 2° by the stern, to understand the difference between their seakeeping performances. The results in this study provide a useful guideline for evaluating operational regulations and safety for high speed semi-planing crafts in the future. View Full-Text
Keywords: semi-planing craft; seakeeping performance; trim angle; strip theory; potential flow theory; sea trial semi-planing craft; seakeeping performance; trim angle; strip theory; potential flow theory; sea trial
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Lin, Y.-H.; Lin, C.-W. Numerical Simulation of Seakeeping Performance on the Preliminary Design of a Semi-Planing Craft. J. Mar. Sci. Eng. 2019, 7, 199.

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