Stability Analysis of Flow Induced Vibration in Cantilevered Fluid-conveying Pipe
The cantilevered fluid-conveying pipe is one of the most innovative and challenging devices in deep-sea mining structures.A flutter of the pipe may occur when the flow velocity exceeds the critical one.This paper investigates the stability of a cantilevered aspirating pipe with different inlet flows.Vibration control equations discretely solved with the Galerkin method are established for different pipe inlet flow parameters,and the effect of axial flow velocity ratio,flow angle ratio,and tangential flow velocity ratio on the critical flow velocity and vibration frequency of the cantilevered pipe are investigated.The numerical results show that the inlet flow field parameters have a significant effect on the stability of the vertical cantilevered aspirating pipe.It is found that when the tangential flow velocity ratio is close to zero,the critical flow velocity decreases with the increase of the axial flow velocity ratio,while the critical frequency of the pipe increases with the increase of the axial flow velocity ratio;when the axial flow velocity ratio increases gradually.The tangential flow velocity ratio has more great effect than the axial flow velocity ratio on the stability of cantilevered fluid-conveying pipe.
cantilevered fluid-conveying pipemodel of inlet flow fieldGalerkin methodcritical flow velocity
NETL
NSTL
万方数据
