Improving the reliability of the designed pipeline facilities by improving acoustic diagnostics of microdefects

摘要

The use of high-pressure pipelines for the transportation of oil products, natural gas, water requires ensuring the trouble-free operation of these structures during the operation period. The reliability and strength of pipelines determines their operational and economic reliability. Obviously, the presence of microdefects in pipelines material leads to a decrease in their strength. In the vicinity of microdefects, the process of material destruction is possible, leading to a loss of strength, which is accompanied by the destruction of structures and, as a consequence, economic damage, environmental deterioration. The study is aimed at developing the approaches and methods for increasing the economic and operational reliability of pipeline facilities by improving the acoustic methods for fixing microdefects in the used construction material. Improvement of acoustic methods for detecting microdefects in viscoelastic materials of pipelines can be carried out by developing mathematically refined models of the cylindrical shells’ dynamics, taking into account real physical and mechanical characteristics, leading to more accurate parameters of combined nonlinear waves. Such models are nonlinear and are built taking into account the real hereditary properties of the material, the possibility of developing large strains in the material.