Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference
Shanghai, China, June 5–10, 2022
Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE)
ISBN 978-1-880653-81-4; ISSN 1098-6189

www.isope.org

A Study on Motion of Russian Trawler in Irregular Wave Based on Model Test
in Various Wave Directions
Thi Thanh Diep Nguyen1 and Hyeon Kyu Yoon2*
Dept. of Smart Ocean Environmental Energy, Changwon National University2*
Dept. of Naval Architecture and Marine Engineering, Changwon National University
Changwon, Gyeongsangnam, Korea
1

numerical method, experimental method and strip method. Jiao andHuang (2020) investigated the seakeeping performance of the S175
container ship by using CFD simulation. The results of ship motion
responses in regular waves and cross waves were compared. This study
discovered that the transverse and heave motion response in the crosswaves can be large from those in the regular waves. Im and Lee (2021)
investigated the effect of tonnage on the motion response of fishingvessel in regular waves. The ship motion responses were performed on
different sizes of fishing vessel by using numerical method. Mainum,Yaakob, Kamal and Wei (2006) estimated the motion spectral of theMalaysian fishing vessel using operation data. The ship motion andwave elevation were measured by vessel motion monitoring system andthe wave buoy. Hence, the motion spectral and response amplitudeoperator were obtained. Nurhasanah, Santoso, Romadhoni andNasutioni (2020) predicted the response amplitude operator and spectral
response in heave, roll and pitch motion by using strip theory
calculation (Maxsurf software). The effect of rounded hull, doublechine and multi chine on ship motion responses were investigated.
Sivabalan and Sivakumar (2020) calculated the ship motion responsesof the fishing vessel in various wave directions. The ship motion
response were carried out in regular waves and irregular waves using
potential flow (MOSES software). Lee, Choi, Ahn, Kim, Kim andShighehiro (2015) studied the ship motion responses in irregular waves.
The ship motion responses in irregular waves were obtained based on
strip method in regular waves and using linear superposition theory toestimate the energy spectrum. Ghamari, Greco, Faltinsen and Lugni(2020) investigated the heave, roll and pitch motion of a fishing vesselby performing numerical method and experimental method with andwithout forward speed in regular waves. The results of the ship motion
response of numerical and experimental method were compared.

ABSTRACT
Currently, the number of the fishing vessel in the world is very large.
The studies related to cargo ships, tankers or large ships are morecarried out than fishing vessels. Moreover, the fishing vessel operates
for a long time at one position in the sea for exploiting fish. Thus, it is
crucial to observe the effect of the irregular wave on the ship’s motion.
The purpose of this study is to investigate the ship motion in theirregular waves by performing the model test. The model test of theRussian trawler was performed in the square wave tank at Changwon
National University in various wave directions at zero speed. An
Optical-based system was used to measure the six degrees of freedom(6DOF) motion of the ship. Firstly, the motion responses of the ship in
the irregular waves in various wave directions are investigated. The
time histories of the ship motion response are transferred to thefrequency domain from the time domain. Secondly, the effect of thewave frequency component on the ship motion responses is analyzed.
The natural frequency of the ship and peak of the wave frequency havestrong responses on the motion spectrum in irregular waves. Finally, theeffect of the wave direction on the ship motion spectrum is discussed.

KEY WORDS: Russian trawler, Ship motion, Model test, Irregularwaves

INTRODUCTION
Nowadays, the number of fishing vessels increase rapidly due toincreased fishing demand. In addition, the fishing vessel operates for along time at one position in the sea for drop and drag the net. The ship
motions are affected by environmental conditions i.e. wind, wave,
current... However, the wave is the most effect on the ship motion.
Therefore, it is necessary to predict the ship motion in sea conditions.

In present study, the ship motion responses in the irregular waves areinvestigated by performing the model test. The model test of theRussian trawler was performed in the square wave tank at Changwon
National University in various wave directions at zero speed. An
Optical-based system was used to measure the six degrees of freedom(6DOF) motion of the ship. Firstly, the motion responses of the ship in

In the part, it has much research studied the ship motion in irregularwaves. Shen, Ye and Wan (2014) predicted the ship motion response inirregular waves using URANS simulations. In their study, the ship
motion responses in the irregular waves were compared by using the* Corresponding author

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