Stability of A Free Span Pipline

A mechanistic study is performed to examine the coupling between the in-line and the cross flow motion of a cylindrical structure subjected to current forces. The structure represents a free span pipeline. A time domain model is formulated in which the in-line and cross-flow deflections are coupled through the axial tension which in turn is computed from the pipeline prolongation at any time. At the end the effects of resonance on the dynamic behavior of pipeline is discussed.