Research On Ship Reconstruction Method Based On Grey Theory And Anti-Explosion Optimization

With the development of modern shipbuilding technology,ship are gradually developing towards large-scale direction.In recent years,the technical experience of building large-scale ship in China is gradually accumulating.However,up to now,there is still no recognized design code for large-scale ship that can be used.The structure of many large-scale ship in foreign countries is worth learning from.Therefore,this paper aims at how to reconstruct large-scale ship of foreign countries.Firstly,based on the grey theory,the typical structure of large warships is reconstructed preliminarily.As the ship design code is a summary of shipbuilding experience,it is of great value,so this paper uses grey theory to mine the data in the existing ship design code.By analyzing the characteristics of the data in the code,the feasibility of using grey prediction technology to model the data in the code is illustrated.The advantages of Grey Theory in dealing with the problem of few data and uncertainty are brought into play.The minimum allowable thickness of typical structure of the ship is modeled about captain by grey model,which widens the scope of application of the ship code.The influencing factors in the process are analyzed.By comparing with the data of foreign large ships,it is proved that this method has certain engineering value in extrapolating the ship data,so as to determine the initial parameters of the structure.On the basis of the results of grey theory modeling,this paper preliminarily reconstructs the object,and analyses the significance and shortcomings of the preliminary reconstructed result.Secondly,in view of the insufficiency of the preliminary reconstruction results and the current situation of foreign warships in strengthening the structural anti-explosion and anti-impact design,this paper determines the principle of in-depth reconstruction by using anti-explosion optimization.The anti-explosion performance of the preliminary reconstructed double bottom structure is studied.The calculation conditions are determined based on the orthogonal screening method.The response characteristics of the double bottom structure under far-field explosion load are studied by the acoustic-solid coupling method.The impact environment of the inner bottom under different conditions is analyzed emphatically.Then,the neural network model is trained with finite element simulation data,and the fast prediction of impact environment of the double bottom structure under different structural parameters and explosive load conditions is realized.Based on the fast prediction model of impact environment,genetic algorithm is used to compile the program for solving the optimal structural parameters under different impact environment constraints,and the optimal structxure under different impact resistance indexes of shipboard equipment is obtained.Thus,the deepening reconstruction based on the principle of explosion resistance is realized on the basis of preliminary reconstruction.In this paper,the research method of ship reconfiguration is put forward,and the method of ship reconfiguration based on Grey Theory and explosion-resistant optimization is formed.