Analysis of the stress-strain state of a tank in case of irregular subsidence along the periphery

Petr Chepur,Alesya Gruchenkova,Aleksandr Tarasenko,Youhai Guan,A.D Abramov,V Murgul

doi:10.1051/matecconf/201823906005

Abstract

In the article, the authors proposed a calculation model for determining the SSS of a vertical steel tank in case of irregular subsidence of the external bottom contour in accordance with the geometric parameters of a real RVS-20000 m3 tank. An experiment is planned and presented including a scheme with two influencing factors: the geometric model of the tank and the value of the dimensionless coefficient m. The influencing factors have 3 and 5 combinations respectively, which is represented in the experiment matrix. The article shows diagrams of displacements, stresses of the tank structures, and graphically depicts the dependences of the displacements of shells on the values of subsidence zones. The presence of a stiffening ring and a stationary roof provides the least values for vertical and horizontal displacements. Conclusions about the influence of the factors considered on the SSS of a tank in case of irregular subsidence of the external bottom contour are presented.

Highlights

Irregular subsidence of the external bottom contour is one of the reasons for the decrease in the operational reliability of the tank (Figure 1)
We suggest considering the influence of the central part of the bottom, annular plate, stiffening rings, roof on the change in the stress-strain state of the tank in case of irregular subsidence
The article presents the results of calculating the SSS of a vertical steel tank in case of irregular subsidence of the external bottom contour, considering the stiffness of such structural elements as the stiffening ring, annular plate, central part of the bottom, and roof

Summary

Introduction

Irregular subsidence of the external bottom contour is one of the reasons for the decrease in the operational reliability of the tank (Figure 1). The question of the effect of irregular base subsidence on the stress-strain state of tanks has not been fully investigated, and the results sometimes contradict each other [8,9,10,11]. In [12], the author calculated the stress-strain state of the lower tank junction in case of irregular subsidence. As it turned out later, the solution in the "elastic" setting, without considering the rigidity of the roof and the stiffening ring, caused serious errors in calculations

Methods

Results

Conclusion