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Publications
Wang, ZK. and Guedes Soares, C. (2021), “Effect of nonlinear pipe-soil interaction on lateral buckling of subsea pipelines triggered by a distributed buoyancy section”, Applied Ocean Research, Vol. 115, 102854.
A distributed buoyancy section is one of the main buckle initiation techniques to trigger a pipeline to buckle laterally in order to release the high axial force induced by the high temperature condition. A key design parameter governing the initiation of lateral buckle is the breakout resistance. In this study, a nonlinear pipe-soil interaction model is incorporated into the mathematical model to study lateral buckling behaviour of subsea pipeline triggered by a distributed buoyancy section. The numerical solution is validated by comparing with analytical results in the literature. A parametric discussion is carried out to investigate the breakout resistance, residual resistance and parameters of the distributed buoyancy section on lateral buckling behaviour. The results show that the breakout resistance has a great effect on the minimum critical temperature difference. The influence of breakout resistance on the buckling behaviour is much smaller than the influence of residual resistance. Moreover, the most optimal length of distributed buoyancy section should be equal to the length of the buckled section. Thus, the largest length of the buckled section during design should be estimated first in order to determine the optimal length of distributed buoyancy section.
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