Research On Fe Parametric Modeling And Non-uniform Optimization Method Of USV

As a generation of new surface combat ship, USV which has been applied to the military field has the characters of high speed, stealth and intelligence, etc. Generally, planing hull form is used in USV design, and according to the principal of planning hull, it can be obtained that the weight has great influences on the performance of the vehicle. And in this thesis, the optimizing method of reducing the weight of the boat has been pursued based on the premise that the strength and the general arrangement requirements have been met.The research was conducted based on the study of the material of the USV hull. The strengthen material and the resin material of the glass which is one of the components of FRP were basically introduced. And emphasis was put on the analysis of the mechanics properties of the FRP. The approximate calculation formula on FRP mechanics was concluded, and the appropriate intensity calibration standards were selected.The finite element model of the vehicle was established by using the parameterize language APDL of ANSYS. And analysis was conducted on the conditions of sagging and hogging of the USV, and the strength of the hull was calibrated. And next, by the combination of ANASYS and iSIGHT software, the expected target function, the variables and the boundary condition were selected, and the optimized value was obtained by the optimization of the USV hull by using the multi-island genetic algorithm.Based on the optimized model and the character of ease of been formed of the FRP, the non-uniform design method which was used in architecture and bridge engineering was introduced, and in order to verify the feasibility of this method, a model of simple beam was analyzed with ANSYS, which provides the theoretical basis and numerical analysis for further optimizing the cross shape of frame. According to the stress distribution, the mechanical performance of frame was optimized, which can achieve the lightest weigh with the adequate material usage by changing the content or distribution of glass fiber.