Abstract：Using the classical equation of fluid-structure interaction, the influence of axial external periodic excitation on the stability of transverse vibration of pinned-pinned pipe conveying pulsing fluid is discussed. The research is based on the traditional fluid-structure interaction(FSI) equation, and second-order Galerkin method is used to make an approximation. The convergence of the solutions is used as a stability criterion to obtain a stability curve. The result proves that the axial periodic excitation could improve the stability of pinned-pinned pipe conveying pulsing fluid when the excitations is under a specific instability frequency, and the amplitude of the excitation is in a certain limit. The stability of the system began to deteriorate when amplitude of the excitation exceeds a certain limit. The excitation could not produce significant effect on the stability of the pipeline near the instability frequency when frequency of the axial periodic excitation is far away from the instability frequency.
2012, Vol. 31 
