Research On The Safety Of Hull Section Hoisting Based On Uncertain Factors

Because of using the hull-outfitting-painting integration and regional construction methods which can shorten the berth period and improve the shipbuilding efficiency in contemporary China shipbuilding, the scale of the hull section is growing. With the steadily increasing of the shipbuilding amount, the situation of safety in the process of shipbuilding is not optimistic at present, serious hoisting accidents have happened for several times in the process of shipbuilding, the research on the safety of large(heavy) hull section hoisting is extremely urgent.Among the factors affecting the safety of large(heavy) hull section hoisting, the uncertain factors referred in the unconventional design are the biggest threat to the safety of hull section hoisting, but it's easy to be ignored, such as the swing, out-sync, command and operation inconsistency when hoisting the hull section. These uncertain factors will directly or indirectly bring about dynamic load when hoisting the hull section, such as inertia load, impact load and alternating load, the lifting lug and hoisting rope may fracture because of the momentary force that increased significantly. So the research on the safety of hull section hoisting based on uncertain factors has important practical significance.This paper mainly studies the influence of uncertain factors on the hull section hoisting, and combining the serious hoisting accidents happened in recent years, to discuss the measures and suggestions to prevent the hoisting accidents, and has proposed some innovative conceptions can be applied to the hoisting process, it's helpful to avoid the hoisting accidents or decrease the damage to the minimum.