| With the the rapid development of science and technology,the application of pressure vessels are more widely used in all walks of life,and the demands of the structure are increasingly high,.Quick-opening structure as the one used in the construction of pressure vessels,in order to meet some of the special requirements of the application process and operation of the more to the more widely,were widely used in chemical industry,papermaking,building materials,textile,food,aerospace,medical and other industries.Quick-opening container structure as a pressure vessel in the main pressure parts,its structure and stress condition are very complicated,China has not yet form the corresponding standard,quick-opening structure design and calculation of reference only and abroad calculation provides different standard reference,quick-opening structure calculated different sizes,high safety factor is not economical,poor competitiveness,the safety factor is too low is not safe,so that the structure of the force needed to adopt more false scientific and rational approach.By high temperature and high pressure containers because of its structure characteristics,the influence of medium,for this kind of problem,conventional design and calculation is complex,some even can’t solve with conventional design,needs analysis and design method.In this paper,a quick-opening pressure vessel of one company was used as a model,the container working temperature is 200 ℃,16 MPa design pressure,compared with previous research of room temperature or bearing water pressure vessel,this ki-nd of vessel accident harm is bigger,cause the losses of life and property,also put forward higher request to design requirement,can adopt the method of analysis and design,make up for the shortage of the conventional design.Given the symmetry of the structure and force of the pressure,with the classic three-dimensional software Solidworks establish overall third model,and then import the Ansys Workbench in finite element analysis,you can reduce the amount of calculation,but also the stress and deformation more intuitive display of the various parts of the pressure vessel,first by static structural analysis to identify areas of stress concentration in the pressure vessel and the location of maximum stress path selection assessment of stress are classified according to various types of stress and corresponding stress intensity assessment criteria assessed..Secondly,the dangerous section of the static analysis for each component obtained at the maximum working pressure and the minimum working pressure,looking for the S-N curve of related materials by JB4732-1995,through the relevant loop design load cases and load cycles under fatigue analysis to calculate the maximum point of the various components of the stress amplitude,pressure vessel draw the fatigue life of the components N> 10000,fatigue cumulative damage coefficient of each component is less than 1,indicating that pressure vessel opening and closing times set for 10,000 times,in line with fatigue strength requirements.Based on the finite element analysis of pressure kettle,for later design from the design method of high temperature and high pressure vessel,put forward the reference and reference. |
