This study investigates the effect of key variable combinations on the loosening performance of a preloaded threaded fastener system under harmonic transverse vibrations, using a software for bolt loosening analysis. The software is based on a mathematical model of the standard Junker test for vibration loosening. Studied variable combinations include the fastener initial tension, thread pitch, bearing and thread friction coefficients, bolt stiffness, and joint stiffness. Generated data on bolt loosening performance is analyzed for trends and relative significance of variables, and variable combinations.
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