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Publications
Wang, ZK. and Guedes Soares, C. (2022), “Lateral buckling of subsea pipelines triggered by a sleeper with a nonlinear pipe-soil interaction model”, Journal of Marine Science and Engineering, Vol. 10, 757.
The buckle-initiation technique, such as sleeper, is usually installed to trigger lateral buckling at the pre-designed location to release axial compressive force induced by thermal loading. Taking the nonlinear pipe-soil interaction model into account, a mathematical model is proposed to investigate the lateral buckling of subsea pipelines triggered by a sleeper. The numerical solution is validated by comparing with solutions in the literature, and it shows good agreement. The discrepancy between them is analysed by presenting the effect of mobilization distance during buckling. The influence of breakout resistance, sleeper height and sleeper friction coefficient on the buckled configuration, post-buckling behaviour and minimum critical temperature difference is discussed parametrically. The results show that the deformation of the buckled pipeline shrinks, both the minimum critical temperature difference and the maximum stress along the buckled pipeline enlarge when the nonlinear pipe-soil interaction model is incorporated. However, the influence of nonlinear pipe-soil interaction reduces with increasing sleeper height.
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