Research on strength and stability of underwater pressure structure considering ellipticity and corrosion effect
In this paper,strength and stability of underwater pressure structure considering ellipticity and corrosion ef-fect was simulated.Initially,a finite element model was constructed,through which the structural failure conditions taking into account the ovality and corrosion effects were preliminarily acquired.Geometric model of ellipticity was established to analyze the influence of different ellipticity on strength and stability of the structure.Then the geometric model of pitting was established according to the aperture and depth of pitting on this basis to analyze the influence of ellipticity and corrosion combined defects on strength and stability of the structure.The results show that the stress concentration increases rapidly as the enlargement of ellipticity.Ovality plays a dominant role in the stress distribution of the structure when ovality and corro-sion exist simultaneously.Besides,defects at different positions have little influence on the overall buckling load of the mod-el in the composite defect model.
ellipticitycorrosion effectunderwater pressure structurestrength and stability
万方数据
维普
