Construction of permissible regions in the load space of above-ground arctic pipelines

Abstract

Estimation of the reliability and safety of Arctic pipelines is associated with the fundamental necessity of taking into account the simultaneous action (combination) of natural and technological loads in the form of random time processes. Practically all existing methods for calculating reliability under the action of load combinations are in the form of random variables, which greatly limits study of the reliability of these systems with time. The methods considering loads as random processes evaluate reliability based on statistical dynamics equations. This requires considerable simplification of the initial mechanics problem, including due to the nonlinearity of the limit state function. The result, which can only be obtained numerically, turns out to be very rough.