Mathematical model of determination of the stress-strain state of the oil pipeline by measurements of the lineal part’s planned-altitudinal location

摘要

In order to assess the impact of ground changes on the stress-strain state of underground pipelines a mathematical model based on the minimization of the Lagrange function was offered. The accuracy of its results was analyzed by comparison with the results of on-site surveys of the underground main oil pipeline on the sections with intellectual embeddings. The results of the verification were presented. It was found that the model allowed to determine the actual safety factor and residual life of the pipeline with reasonable accuracy based on the measurement data of the planned-altitudinal location, to identify in the shortest period by calculation potentially dangerous and critical areas of the facility that need the engineering protection or reconstruction.