Investigations on a moving target’s penetration into the seabed sediment using the ALE technique

Abstract

ABSTRACT Accurate prediction about the penetration depth of moving targets is vital for the deep-sea target detection. Moving targets penetrating into the seafloor sediment always produce large deformation, the Arbitrary Lagrangian-Eulerian (ALE) technique has better grid adaptability and it can solve the mesh distortion generated by moving targets penetrating into seafloor sediment. Therefore, in the present work, investigations on the moving targets’ penetration into seafloor sediment are conducted based on the ALE technique. The physical process of moving targets’ penetrating into the seafloor sediment is simulated using the ALE technique. Results by the ALE technique are compared with empirical results and experimental results to verify the ALE method. On the basis of the verification study, the effects of sediment property and target’s mass, impact velocity and penetration angle on penetration depth are also explored.