MODELING OF VERTICAL CYLINDRICAL PETROLIUM TANKS WITH BODY FORM IMPERFECTIONS
Authors:
1.
KNITU
Type:
Article
Pages:
from 102
to 107
Status:
Published
Received:
25.12.2025
Accepted:
25.12.2025
Published:
25.12.2025
Language:
Russian
Keywords:
PETROLEUM TANK, FORM IMPERFECTION, INTERPOLATION ALGORITHM, BUCKLING, FINITE ELEMENT METHOD
Abstract (English):
Vertical cylindrical petroleum tanks are typical equipment of enterprises for oil production, transportation, refining, also used in the chemical industry to store large volumes of liquid products. The operational reliability of tanks determines the safety of enterprises and ensuring high production performance. Ensuring tank reliability requires strict compliance with the requirements of regulatory documents governing the operations performed by personnel at all stages of the tank life cycle. At the same time, engineers of enterprises and engineers of third-party organizations have to solve tasks that go beyond the normative documents. One of these tasks is the need to assess the performance of a tank with geometric deviations of the body from the design shape. The paper proposes a practical method of modeling the tank body, which takes into account the change in the design shape of the body due to the violation of rigging-up technology and subsidence of the tank base during operation. Initial data for modeling are taken from the analysis of the results of instrumental inspection of the tank body, conducted by engineers of the expert organization for the purpose of diagnostics of the technical condition and determination of the residual life of the tank. The results of the instrumental survey are presented in the form of tables, which contain deviations of the points of the control vertical lines of the body from the vertical and horizontal deviations of the external contour of the tank bottom at the lower points of the control vertical lines. An algorithm based on a combination of Lagrange and Fourier interpolation polynomials is used to model the closed lines of the tank shell surface. An interpolation algorithm is developed to model the wave formation process of the closed surface of the tank shell in the problems of evaluating the stability of the shell shape. Examples of stability assessment of the body of RVS-400 and RVS-3000 tanks are considered.
Vertical cylindrical petroleum tanks are typical equipment of enterprises for oil production, transportation, refining, also used in the chemical industry to store large volumes of liquid products. The operational reliability of tanks determines the safety of enterprises and ensuring high production performance. Ensuring tank reliability requires strict compliance with the requirements of regulatory documents governing the operations performed by personnel at all stages of the tank life cycle. At the same time, engineers of enterprises and engineers of third-party organizations have to solve tasks that go beyond the normative documents. One of these tasks is the need to assess the performance of a tank with geometric deviations of the body from the design shape. The paper proposes a practical method of modeling the tank body, which takes into account the change in the design shape of the body due to the violation of rigging-up technology and subsidence of the tank base during operation. Initial data for modeling are taken from the analysis of the results of instrumental inspection of the tank body, conducted by engineers of the expert organization for the purpose of diagnostics of the technical condition and determination of the residual life of the tank. The results of the instrumental survey are presented in the form of tables, which contain deviations of the points of the control vertical lines of the body from the vertical and horizontal deviations of the external contour of the tank bottom at the lower points of the control vertical lines. An algorithm based on a combination of Lagrange and Fourier interpolation polynomials is used to model the closed lines of the tank shell surface. An interpolation algorithm is developed to model the wave formation process of the closed surface of the tank shell in the problems of evaluating the stability of the shell shape. Examples of stability assessment of the body of RVS-400 and RVS-3000 tanks are considered.
Keywords:
PETROLEUM TANK, FORM IMPERFECTION, INTERPOLATION ALGORITHM, BUCKLING, FINITE ELEMENT METHOD
PETROLEUM TANK, FORM IMPERFECTION, INTERPOLATION ALGORITHM, BUCKLING, FINITE ELEMENT METHOD
