Dynamic analysis of an axially moving underwater pipe conveying pulsating fluid

In this paper, both linear and non-linear dynamics of a slender uniform pipe conveying pulsating fluid, which is axially moving in an incompressible are comprehensively studied. The vibration equations the system established by considering various factors, including coordinate conversion system, “axial added mass coefficient” describing additional inertia forces caused external Kelvin–Voigt viscoelastic damping, kind axial tension, internal fluid. discretized Galerkin procedure solved Runge–Kutta approach, validity solution carefully checked. After that, responses studied when flow velocity speed small. For responses, damping has great influences on second third modes system. dynamic, results rich changeful, first principal parametric resonances, secondary resonance, combination period-1 motion, quasi-periodic chaotic motion. Finally, influence several key parameters analyzed.