Study On The Safety Of Transportation Of Timber Carrier Based On IMO Rules

The fast increase in timber demand of our country provides a very good opportunity to the timber shipping market. In the process of timber transportation, the ship-owners or charters of timber vessels always try their best to load more cargo on board, which brings hidden danger for the safety of timber transportation for the stability of those vessels are mostly insufficient. Because the stowage of deck cargo on timber ship, the area above water plane is very big, the change of stability caused by the effect of wind can not be neglected. In order to safeguard the security of the transportation, IMO bring forward different requests for timber vessel on stability criterion considering the particularity of timber vessels. Our country and some other country like Japan, Canada put forward their own complementary amending plan to the IMO proposition on the foundation of the IMO resolution. So this thesis focuses on how to give quick judgment of the stability of timber vessels.According to the ship's statics and stability criterion, this article discusses the calculation method of permitting height of barycenter under different stability criterion request, which can reflect the stability of timber vessels more intuitively. Besides, this thesis also realizes the automatic judgment by programming that if a timber ship can satisfies each stability request.This article firstly introduces the present situation of timber vessel transportation, expatiates the loading characteristic, the structure, the determination of loading capacity, the stowage and colligation of timber vessel. Secondly, this thesis calculates the penetration coefficient of timber on board under great inclination angle condition, and explains the influence to metacentric stability of the buoyancy of the timber on board, illuminates how to adjust the stability of timber ship under different loading conditions. Then, according to the IMO stability requests of timber ship this article advances a way to examine and calculate the permitting height of barycenter of timber ship. Finally, takeing Visual Basic 6.0 as the developing platform, this thesis programs to verifies the feasibility of vessel TAIBAIHAI under the condition of carrying timber and log.