Estimation of the Durability of Technological Rotating Objects by Data on the Displacement of Their Surface Points

Abstract

In order to evaluate the actual technical condition of operating main and technological pipelines, cylindrical-rotating objects, the issue of technical resource estimation is considered taking into account the life of the objects, the modes of action on them of force factors of different nature, which can cause changes in the bearing capacity of the objects. Using statistical approaches provides additional information about the loading of the object being investigated, the presence of periodic loads. For this purpose, the components that characterize the change in stresses of the deformed state are studied. To evaluate the durability of structures, it is necessary to determine whether the law of stresses change obeys the normal law of distribution. In this case the sectors on a cylindrical object are selected where the stress change is maximum. It is potentially possible to control the process of stress changing at each point in the grid, but in this case there is a need to deal with big volume of calculations. The calculation scheme is proposed for estimating the durability of technological rotating objects using a statistical criterion, as well as a method for determining the change in the stress-strain state of these objects. The technique of testing the hypothesis is implemented about the normal law of distribution of random variable that is changing the stress state of the studied object. The directions of further researches are established.