The Mechanical Calculation And Technology Optimization Of Ship Launching With The Airbags

Let's look at the developing trend of the world industry , the diversified soft mode of production must be instead of the batch flowline production. The small and medium shipyards must transform the shipbuilding mode along the coast and river in the internal ship industry of our country. The conventional shipbuilding mode has being changed by an new flexible mode which will arousing a transform of shipbuilding production organization. Ship launching with airbag which is a flexible technology of high adaptability emerges as the times require along with the transform.Although the technology of ship launching with airbag is perfect at present, it has higher risk of dangerous along with the augment of launching ship's weight and the increasing of the indeterminate factors. We must advance the loading carrying capacity of airbag and make more reasonable launching project to settle the safety problems which restrict the development of this flexible technology. So this paper discusses the airbag's mechanic calculation and how to make the launching project. For the intent of improving the launching carrying capability and the economical efficiency it also estimates the highest launching weight under the technical level in existence.First according as the main stress changing when the airbag is impressed under the freedom station, this paper discusses the changing rule of the inner pressure and research airbag's limited strength by the finite element analysis method. It also analyzes the technology factors and correlations of the technology factors of the single airbag to prepare for the later calculations.Secondly this paper discusses fact operations and technology requirements during the two steps of the launching courses. It also analyzes the movements and forces of the hull during the second step and calculates the exceeding loading of the airbag under the stem when the stern is floating by two manners of the traditional static calculation and improving elastic calculation. Thirdly this paper designs different process programs for the 15 800T Bulk Carrier and optimizes the project considering the safety and the economical efficiency in the base of two before chapters. It is also the emphasis of the paper.Finally summarize the conclusions and the defects of the research and indicates the development direction of the further research.