PREDICTION AND EVALUATION OF THE RISK OF CHANGING THE GEOMETRIC SHAPE OF A GAS PIPELINE
Trunk pipelines during operation under the influence of the permanent pressure drop, which leads to their elongation, and consequently, appearance of instability position in space. In dynamic systems that have feedback effects should be observed prior to emergency events. The article deals with the forced oscillations of a cylindrical surface of a gas pipeline under the action of dynamic loads caused by pressure surges and the process of violating the geometrical shape. Determined frequency vibrations arising in the piping at the stage preceding its bending. Identification of this frequency can be the basis for the development of a method for monitoring the technical condition of the pipeline and forecasting of possible emergency situations allows you to plan and carry out timely repair work on sections of the pipeline with a possible deviation from the design position.