Analysis of the Stress–Strain State of Structures Consisting of Two Pipelines with Different Locations in the Flow

Underwater transportation pipelines, elements of gas and petrochemical engineering, and heat exchange equipment are examined. Hydroelastic excitation with periodic vortex shedding is considered. The parameters of the impact on two pipes in the flow are determined, and based on this, the best option for their positioning is determined in terms of the material endurance under asymmetric loading cycles. The parameters of the stress–strain state of structural elements for the selected pipe arrangement are identified and compared with permissible values.