| Pressue spherical hull design is the most critical technology of a deep manned submersible and its weight occupies a higher proportion of the manned submersible.so the importance of pressure spherical hull for deep manned submersible overall performance is self-evident.This paper is based on the major national special project "Study On The Concept Design of Lightweight Operating Manned Submersible".Based on approximate model and multi-objective optimal theory,pressue spherical hull optimial design have been performed.Robust optimization design for pressue hull haven been carried out based on robust design theory.In order to solve problem of continuity for Traditional optimiazation design,the secondary development technology for CATIA is carried out to bulid parametic pressue spherical hull model using VB language.Parametic pressue spherical hull model auto-meshing is carried out using PYTHON language.The strength analysis and the ultimate strength analysis of spherical pressure hull are calculated by nonlinear FEM.The results of the model test prove that finite element computation is correct.In this paper pressue spherical hull optimial design are carried out based on approximate model.Sensitive degrees of design variable have been analyzed through first design experiment.Sensitive design variables are chosen to bulid approximate model for pressue spherical hull structure response,and the precision analysis of approximate mode are analyzed through second design experiment.Single objective and multi-objective optimial design of pressue spherical hull is analyzed by optimization algortithm based on approximate model instead of FMA.Compared with the result of FMA result,the correctness of optimial result is performedFinally comparision A 6 σ-based single response and multi-response robust optimization are carried out,both design experiment approximate model and Monte Carlo simulation technique are integrated.The robustness of constraint conditions are improved. |
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