ESTIMATION OF STATIC STRENGTH OF INDUSTRIAL SEPARATOR UNDER LINEAR AND NONLINEAR DEFORMATION OF ITS STRUCTURAL COMPONENTS

摘要

The problem of estimation of static strength of plunge pipe joints of industrial separator operating under an internal pressure is discussed. Linear and nonlinear static analysis of the industrial separator is carried out and the strength of the pipe joint is estimated by elastoplastic calculation. Numerical simulation is accomplished by the finite-element method in elastic and elastoplastic formulations and calculation is performed by the SAIS program developed by these authors. The results of traditional calculation are presented in conformity with Russian strength standards based on elastic stress categories prevalent in chemical engineering and nuclear industry, which give ambiguous strength estimates. An alternative approach based on nonlinear analysis methods and methods of determination of limit load, which substantiates selection of the allowable load, is proposed.