merged

Corse Stability Analysis On Ship Towing System Using Computation Fluid
Dynamics
Nur Aqilah Hanis Binti Zalizan
Supervisor: Assoc. Prof. Dr. Eng. Ahmad Fitriadhy
Bachelor of Applied Science (Maritime Technology)
School of Ocean Engineering
Universiti Malaysia Terengganu
Ship towing system are commonly used in emergency for towing immobilize ship and
also transportation of unpropelled barge. Considering instability during operation may
effect the towing performance, this paper proposes an analysis for course stability of
ship towing system by using Computation Flow Dynamic (CFD). Effects of unstable
(2B) and stable towed ship (2Bs), towline, tow points and tug’s dimension have been
taken to account. The results demonstrated better course stability of 2Bs compared
to 2B. Indicated through attenuation in slewing motion, the towing system is more
stable as the towline become longer and shifting toward bow. Lateral motion of the
tow ship increased gradually with shifting the tow point forward of the ship’s centre
of gravity. This degrades the course stability of the towing system. In general, the
increase of the tow ship’s dimension was still insufficient to improve the course stability
of the ship towing system.
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