Research On Ultimate Strength Capacity Of Damaged Ships Under Different Floating States

Today's global economy continues to blossom, to communicate between the countries have become increasingly frequent, waterways for transport of large quantities of goods have a unique advantage in the global flow of goods in the indispensable. The ship used in the process, there will inevitably be unexpected general average accident. When the ship after damage to a certain extent, the ultimate carrying capacity of the ship important technical indicators can cause varying degrees of impact. After the damage caused flooding and leaking cargo ship deadweight loss and changes in buoyancy, thus affecting the floating condition of the ship. On the other hand, damage caused by the loss of the hull structure of the ship structure strength. Under the influence of these two factors, whether the ship is damaged it can be safe navigation, or the implementation of the program should take to rescue and towing. A complex set of factors that need to combine the structural characteristics of the ship itself, the initial deformation, damage location, extent, ships and other floating state judge, after a study of the hull damaged by the carrying capacity of academic attention.Previous studies showed that the ship is at the limit of the carrying capacity of damaged and the initial deformation of loading, the ship floating state, as well as breach of the size, shape, location is directly linked. Already in previous studies, most of computing the carrying capacity of a ship limits, the initial deformation of the loading is different, and largely based on the ship in the upright state carried out under this assumption. Understand the influence of the initial deformation of the ship carrying capacity analysis to accurately calculate the various floating state ship ultimate strength, will help improve the carrying capacity of the ship limit. Firstly, after using the finite element method to expand the influence of the initial deformation of the hull structure under a variety of load carrying capacity, the initial deformation have a full understanding, and then select the appropriate initial deformation Smith simplified method for ultimate bearing capacity of damaged hull floating state in different a more comprehensive calculations. Based on these results, we summarized a series of break parameter, the correspondence between the ship and the ship floating condition between Ultimate Longitudinal moment, and variation.