Analytical Method And Numerical Simulation Of Large Storage Tank Under Wind Pressure

As an important equipment of the main petroleum industry,large-scale storage tanks are of great value to the development of national petroleum strategic reserves.Most of the large steel storage tanks are built in coastal areas,under the action of wind load,it is easy to make empty tanks or low-liquid tanks refracted,resulting in serious environmental problems and huge economic losses.So far,most wind-induced flexion studies focus on perfect tanks,while tanks with initial geometric defects are rarely involved.This thesis mainly studies the wind load and wind-induced buckling behavior of large steel storage tanks and the wind-induced bending behavior of corrosion tanks,and the results of the study have some reference value to the wind-resistant design of large steel storage tanks.This thesis is divided into four parts:(1)This thesis expounds the basic situation of large tank wind buckling,the type of wind destruction and buckling,and the corrosion principle and type of tank,summarizes the current situation of large-scale tank wind-buckling at home and abroad,puts forward a new direction of the current research,and shows the main research content and technical route of this thesis.(2)Homotopy analysis method for tank buckling under non-uniform wind load.The control differential equation of tanks buckling under the action of non-uniform load is solved by the homotopy analysis method,and the results of the homotopy analysis method are compared with the perturbation method results.Through a calculation example,the precision of homotopy analysis and the perturbation method is analyzed.Using the homotopy analysis method to solve the problem of subgressive tank under non-uniform load,it is of some theoretical significance for further study of this problem.(3)Numerical simulation large tank wind-buckling.To determine the surface air pressure distribution of large tanks,the approximate formula of the body coefficient suitable for large tanks is obtained.The linear and nonlinear analysis under the action of large tank static wind is carried out,the influence of the initial defect on the static refractive performance of the tank is discussed,and the strengthening mechanism of large steel tank is analyzed from the aspect of wind resistance structure,which includes the angled steel,the top and the middle wind ring,and provides suggestions for the windresistant design of large storage tank,and also lays the foundation for the study of large steel tank wind-bending.(4)The effect of corrosion in different parts on wind buckling in large storage tanks.The upper,lower and overall corrosion are taken as research variables,and the windinduced buckling simulation of the tank is carried out.The tanks also consider bare tanks and tanks with wind-resistant structures,and compare the results of different parts for comparative study.In this thesis,a total of 80 different parts of corrosion tank model,224 groups of wind linear and nonlinear characteristics of the subservience of the study.The fitting formula of the corrosion age of different parts of large tanks is summarized.A theoretical basis is put forward for the study of wind resistance in large tanks with corrosion.