Research On The General Design And Optimization Of AUV For Polar Region Operation

In response to the needs of scientific exploration and operation tasks in polar regions,AUVs for polar region operation tasks were taken as the research object,and the general design of AUVs and multidisciplinary optimization design methods were carried out,aiming to provide relevant technical references for AUV design work.The main work contents of the thesis are as follows:(1)According to the requirements of the mission statement,the general design of the AUV for polar region operations was carried out,the general layout of each structure and equipment was studied,and the AUV integrated system was formed.Using the temperature,salt and depth data of the polar sea area,combined with the planned mission time,a depthdensity model of the polar sea area was established to check the hydrostatic performance of the AUV when operating in the polar area.(2)Research on the construction method of combined approximation model was carried out.On the basis of comparative analysis of the response surface methodology,kriging model and radial basis neural network model,a combined approximation model based on the evolutionary gradient-based method and the minimum mean square error method was constructed,and the model accuracy,optimization algorithm and optimization strategy were analyzed.verified.(3)Discuss the multi-disciplinary division strategy of AUV system.According to the background of AUV operation tasks,it is divided into boat type discipline,structure discipline,general layout discipline,manipulation discipline,energy discipline and operation discipline,and the design variables and value ranges of each discipline are determined,and the sensitivity analysis of each design variable is carried out.(4)Research on the multidisciplinary optimization design of AUV in polar regions has been carried out.According to the parallel subspace design method,a multi-disciplinary optimal design model of AUV in the polar region was established,and the optimized design scheme of AUV in the polar region was obtained with the minimum hull resistance and hull weight as the optimization goals.Carried out the optimization design research of AUV series.Through the scaling method and all-at-once method,the series optimal design model with AUV weight as the variable is established,and the AUV series optimal design spectrum is obtained.