Experimental and Numerical Analysis of Structure-Ice Block Collisions

Abstract

This paper investigates the structure colliding with an ice block in water through numerical simulation and experiment. A series of tests are carried out in the ice tank to obtain the contact pressure and ice movement. A numerical simulation scheme based on LS-DYNA is applied to simulate the ship-ice-fluid coupling, and is validated with the local contact force and the ice movement obtained from the experimental results. Through the investigation, the results are discussed focusing on the process of structure-ice-water interaction, overall collision force and local contact pressure, velocity of the ice, and ice damage characteristics under different collision modes and collision velocities. It has been found that the ice undergoes ice tilting, fluid upwelling, as well as ice drifting process. The numerical simulation well reproduces the local contact force between the ice and the structure and the ice damage in contact area. The motion characteristics and velocity variation patterns of the ice after collision have been effectively captured by the numerical simulation as well. The investigation shows that the numerical method possesses good accuracy in simulating the ice-structure-fluid interaction features. The experiment also serves as a valuable reference for other simulation method.

Keywords

Ice load / Ship-ice-fluid interaction / Ice experiment / Arbitrary Lagrangian-Eulerian method / Iceberg collision

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RIGHTS & PERMISSIONS

Harbin Engineering University and Springer-Verlag GmbH Germany, part of Springer Nature