The study objective is to determine the effect of residual deformations on the behavior of the boiler during operation. Tasks: to develop a creep model based on flow theory and a methodology for calculating creep deformations of a railway tank boiler that occur during long-term operation. The methods of elasticity and creep theory, finite element method are used. The novelty of the work is in the development of a methodology for determining residual deformations in the boiler of a tank car. The results of the study are the dependences of the value of residual deformations on various factors, the deformation of the boiler in the support zones, the selection of parameters of the creep model. Conclusions: in the study, the creep state equation is modeled, on which basis calculations of various technical solutions for reducing residual deformations in the boiler are carried out. The options are compared.

The paper presents a method for calculation of railway tank shells at an impact with the consideration for material plasticity. The authors have modelled failures of a tank shell with a safeguard bow on a bracket and without a bracket in a non-linear static formulation. Modeling allows formulating a methodology for determination of strength properties of railway tank shells in conditions of an impact and allows realizing protection of tender spots of design. It is determined that the use of the safeguard bow on a bracket is a preferred technical solution, that is why this design is selected for the study aimed at gaining the best parameters of tank shells.