Asessment of corrosion fatigue strength of gas-transport system constructions under atmospheric forcing

摘要

Calculated influence method of strengthening technology(surface plastic deformation)of gas-transport system(GTS)weld bead in the conditions of atmospheric forcing in order to increase its bearing capacity and service life is suggested.It is shown that relative strength factor of weld bead at the same time is a probabilistic function of fatigue life.Ananalogical function of the new coefficient is proposed-relative life to assess the service life of the GTS with its periodic loading.Using the system comparable and initial quantitative lines of corrosion fatigue,the equations of the functions of these coefficients are obtained,allowing to clarify the strength and durability of GTS in the real service interval and variable loading,taking into account the strengthening of weld beads.