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A Numerical Study on the Effects of Maneuverability of Ship with Low Forward Speed by Increasing Rudder Force

타력 증대가 저속 운항 선박의 조종성능에 미치는 영향에 관한 수치적 연구

Kim, Hyun-Jun;Kim, Sang-Hyun;Kim, Dong-Young;Kim, In-Tae;Han, Ji-Soo
김현준;김상현;김동영;김인태;한지수

  • Received : 2015.12.14
  • Accepted : 2016.06.03
  • Published : 2016.06.20

Abstract

Recent accidents of crude oil tankers have resulted in sinking, grounding of vessels and significant levels of marine pollution. Therefore, International Maritime Organization (IMO) has been strengthening the regulations of ship maneuvering performance in MSC 137. The evaluation of maneuvering performance can be made at the early design stage; it can be investigated numerically or experimentally. The main objective of this paper was to investigate the maneuvering performance of a VLCC due to the increase of rudder force at an early design stage for low speed in shallow water conditions. It was simulated in various operating condition such as deep sea, shallow water, design speed and low speed by using the numerical maneuvering simulation model, developed using MMG maneuvering motion equation and KVLCC 2 (SIMMAN 2008 workshop). The effect of increasing the rudder force can be evaluated by using numerical simulation of turning test and ZIG-ZAG test. The research showed that, increasing the rudder force of a VLCC was more effective on improving the turning ability than improving the course changing ability especially. The improvement of turning ability by the rudder force increasing is most effective when the ship is sailing in shallow water at low forward speed.

Keywords

Maneuvering;Rudder force;Shallow-water;MMG model;Turning ability;Yaw checking ability;numerical simulation

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