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An algorithm for calculating the stress-strain state for a system of long-length flexible pipes on a drum is proposed. The material which the pipe is made of operates in the area of plastic deformation due to the relative small drum diameter. To take into account the nonlinear properties of the construction material, the concept of a variable (secant) module is used. The algorithm for calculating the stress-strain state of a flexible reinforced long-length pipe was compiled on the basis of the iteration method in terms of the magnitude of the change in the secant modulus. A block diagram is given. Numerical results of the stress analysis of a flexible pipe made of reinforced polyethylene are presented in the form of graphs and tables.

SIMULATION OF THE STRESS-STRAIN STATE FOR LONG-LENGTH FLEXIBLE PIPES