Wave-Induced Pipeline On-bottom Stability: Comparisons between Pipe -Soil and Wave-Pipe -SoilInteraction Models

摘要

To have a better insight into the mechanism of wave-induced pipelineon-bottom stability, the pipe-soil interaction model (Wagner et al., 1987)and the wave-pipe-soil interaction model (Gao et al., 2003) arecompared intensively in this paper. This includes the comparisons oftheir experimental setups, procedure of tests, phenomena of pipe losingstability etc. The comparison indicates that the critical lines for theinstability of anti-rolling pipeline and freely-laid pipeline in theempirical wave-pipe-soil interaction model overall agree with thedesign values , based on both simplified and generalized methods inDnV standard, respectively. However, with the increase of Froudenumber, the generalized method in DnV standard becomes moreconservative than the wave-pipe-soil interaction model for the onbottomstability design of pipeline. Therefore, wave–pipe-soil couplingeffects should be taken into account when we analyze the on-bottomstability pipeline under wave loading.