Numerical calculation of the vacuum degree for a corrugated wall

The article presents a numerical calculation of the corrugated wall of a transformer under pressure. The permissible degree of evacuation of the wavy transformer tank is determined. The statement of the problem is formulated as follows: to determine the limit of the maximum allowable pressure during the evacuation of the tank with different geometrical dimensions of the corrugation. In this case, the maximum equivalent stress should not exceed the yield point and the walls of the corrugation should not close. Numerical calculation is carried out by the finite element method. This approach to calculating the behavior of a corrugated wall under pressure can be used to determine the maximum allowable internal pressure of the tank.