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.

摘要

运动目标穿透深度的准确预测对于深海目标检测至关重要。运动目标穿入海底沉积物总是产生较大变形，任意拉格朗日-欧拉（ALE）技术具有较好的网格适应性，可以解决运动目标穿入海底沉积物产生的网格畸变。因此，在目前的工作中，基于ALE技术对移动目标对海底沉积物的渗透进行了调查。利用ALE技术模拟了运动目标侵入海底沉积物的物理过程。将 ALE 技术的结果与经验结果和实验结果进行比较，以验证 ALE 方法。在验证研究的基础上，沉积物性质和目标质量的影响，