Bionic Venation Layout Optimization Of Stiffener In Plate Structures Under The Jet Load

Stiffened plate structure has the advantages of simple structure, less material consumption, high strength, and good stability, which has been widely used in aerospace, ship manufacturing and other fields. At the same time,because of good mechanical properties of the stiffened plate structure, it is widely researched by many researchers in many countries.Now, the research on the stiffened plate structure is mainly concentrated on static analysis and dynamic response analysis under the impact load. The research works mainly focuses on the orthogonal stiffened plate. But, the researches on the acoustic radiation characteristic of stiffened plate structure and based on the bionics principle to distribute the reinforcement are relatively less. Therefore, the research work of this paper is mainly based on the growth criterion of leaf venation, and setting up the vibration model of stiffened plate and acoustic radiation optimization model under the impact load. At last, we can get the distribution curve of the stiffener by the structure optimization method.First of all, the generation of jet load from underwater explosion bubble and the process of jet load are briefly described, The water hammer pressure formulas were deduced when jet load and structure interaction. To establish the plate structure vibration sound radiation model by using the basic theory of acoustic,and verified by numercal example,established the jet load and structure coupled finite element model. Subsequently, the finite element model of fluid-solid coupling is established. Secondly, low pressure bubble jet experiments are conducted subsequently. In the process of experiment,the data of boundary above the bubble and boundary under the bubble, jet velocity of different detonation distance, and bubble jet shape are studies. The numerical results are compared with the experimental values by using boundary element method. Third, summarize and simplify the experimental jet loads.According to the principle of bionic venation layout of stiffener,and applied the jet load to the bionic venation layout of stiffener, Optimizaition the reinforcement distribution by acoustic radiation theory, so, the reasonable distribution of reinforcement curves,can be got.Three different kinds of seeds distribution model were selected, and analyzed acoustic radiation of stiffened plate. Finally, through the bionic venation layout theory of stiffener and jet load experiment set up the finite element model. Impact dynamic response is analyzed by four different arrangement of reinforcement.Bionic venation layout stiffener plates has excellent ability to reduce noise and impact resistance. By researching on layout optimization of stiffeners imitation venation, proved that the presented method can achieve lightweight structure and reduce the vibration acoustic radiation of structure more effectively at the same time, the layout result was suitable for processing,the method can applied to a number of plate and shell structures in practical engineering.