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A Novel Conceptual Telescopic Positioning Pile for VLFS Deployed in Shallow Water: Function Verification

A novel conceptual telescopic pile is proposed to position a multi-modular very large floating structure (VLFS), which is supposed to serve as a movable floating airport. The telescopic piles can automatically plug in and pull out of the soil to resist the environmental forces. The demonstration of the feasibility of this conceptual design includes two parts: function verification and structure design. In the function verification, the bearing capability and dynamic responses are primarily investigated by the finite element method (FEM) using Abaqus software. The obtained results reveal that the dynamic response feature is quite good. Based on the coupled Eulerian–Lagrangian (CEL) method, the plugging and pulling processes are explicitly simulated. The results indicate that both the operations are quite safe and can be independently accomplished by vertical forces supplied by the adjustment of the ballast water and draft of the module.