Factor Model of Vibrodynamic Load Effect on Pipeline Reliability

Purpose: To build a factor model of vibrodynamic loading influence on pipeline reliability based the results laboratory tests carried out taking into account amplitude-frequency characteristics vibration process operating pipeline, obtained during full-scale at railway station. On basis to determine most significant factors affecting pipelines under action and propose ways improve their reliability. Methods: The plan fractional experiment 25-2 type was used carry stresses familiar constant cycle. experiments were test bench with pulsating cylinder PC maximum load 200 kN. Voltages applied from control panels static (from soil) dynamic rolling stock) loads. Impulse shape sinusoidal, closest natural one, cycle frequency — 300 c/min. regression equation coefficients calculated computer using multiple linear correlation program. significance assessed by Student's test. Fisher's check adequacy experimental data. Adequacy physics phenomenon tested Results: Tests application allowed study in form polynomial first degree. It has been established that main influencing are train load, amplitude depth its embedding. no However, it follows depends diameter. Practical significance: is obtained, which transformed switching coded values values, can be for practical purposes intensity failures duration operation between failures.