Numerical Research on the Influence of InitialState on the Penetration Characteristics of Power Anchors in Soil

In order to solve the critical problem of low efficiency in traditional breach closure techniques,the paper proposes an innovative approach utilizing dynamic anchors for rapid construction of anchor points at dike breaches.The penetration mechanism of dynamic anchors is one of the key scientific problems underlying this novel technology.Focusing on breach-specific dynamic anchors and dike soils,the paper investigates the penetration behavior of anchors and the key factors by means of numerical simulation method.The three-dimensional mathematical model was established using Ansys software and the multi-material Arbitrary Lagrangian-Eulerian (ALE) method.The penetration processes of dynamic anchors under various initial conditions were simulated,and key parameters were collected,such as penetration velocity,displacement,centroid trajectory,and attitude deflection angles.Result indicates that the penetration velocity of dynamic anchors approximately decays following a trend of exponential function with diminishing gradients,while the penetration depth curve presents a logarithmic function.Trajectory parameters and deviation magnitude are closely associated with the incident angle and initial velocity,and data shows that vertical incidence penetration in a direction of 90 degree is supposed to fulfill the optimal penetration efficiency,i.e.,with deeper penetration and minimal deviation.Besides,adding rotational inertia could enhance the penetration stability of dynamic anchors,and the optimal stabilization is observed as the spin angular velocity is 50rad/s.Additionally,adding external loads would significantly increases not only penetration depth but also the offset.The result may provide theoretical and technical support for the design of dynamic anchors and the development of novel breach emergency response technologies.