TRANSVERSE VIBRATION AND STABILITY PARAMETERS ANALYSES OF AN OFFSHORE FLUID-CONVEYING PIPE

Abstract

The vibration and the stability behaviour of a simply supported offshore pipe conveying fluid was investigated in this research work. The governing differential equation for the transverse vibration of the system was derived according to Euler Bernoullis’ equation for the fluid-pipe system and solved using the integral Fourier- Laplace Transformation. The effect of some flow parameters like mass ratios, Coriolis force and velocity of flow were analysed. The results revealed that natural frequency increased with increase in mass ratios and pipe thickness while it decreased with increase in pipe length. Flutter instability was observed in the system due to the presence of complex natural frequency where the imaginary part dominated the flow situation. The instability was made worse when Coriolis force was neglected