Development of shell digital model in order to determine effect of technological deviations on shell limit state.

This paper presents results of determining the effect of technological deviations on the limit state in mechanical engineering, on example of shell type equipment using digital model. Development of a model that takes into account accurate geometric features, distribution of physical and mechanical characteristics and behaves like real object under influence of operating parameters is one of the most promising areas for reducing production risks. Three cylindrical shells made of steel 09G2S according to the same design scheme were chosen as the object of research. Comparison and analysis of results of loading by internal pressure until destruction of three shell models with ideal model shows that even permissible technological deviations contribute to a significant redistribution of stress and affect limit state. Potential zones of destruction are formed, the internal pressure required for destruction decreases. Destruction of all three models occurred in different places of shell under different conditions. Taking into account peculiarities of shells, timely identification of potential destruction zones and use it during technical examination will reduce the risk of an accident. [ABSTRACT FROM AUTHOR]