中文摘要：

深水锚是深水系泊系统的核心组成，随着新概念和新技术在深水系泊领域的不断涌现和发展，深水锚在海床中的动力行为变得更为复杂，这给既有的分析方法带来极大的挑战。将深水锚的复杂动力行为视为拔出、旋转、嵌入三种典型行为的组合，分别给出明确定义并建立力学模型。提出最小力准则以确定锚的拔出、嵌入方向和旋转中心，该准则同时可作为拔出、旋转、嵌入行为是否发生的判定条件。从而建立起可以描述深水锚在海床中复杂动力行为的分析模型。为检验所提出的分析模型，将其应用于预测拖曳锚在海床中的嵌入运动轨迹，并与已有分析方法和离心机试验结果进行对比，验证了该分析模型的有效性。

英文摘要：

Deepwater anchor is the core component of deepwater mooring system. With the development of new concepts and technologies in the field of deepwater mooring, the kinematic behavior of deepwater anchors in the seabed becomes more complicated, which brings great challenges to the published analytical methods. The comprehensive kinematic behavior of deepwater anchors is herein regarded as the combination of well-defined Pulling out, Keying and Diving, whose mechanical models are developed respectively. The ＂Minimum force principle＂ is proposed not only to determine the directions of pulling out and diving and the center of rotation, hut also to serve as the criteria for whether Pulling out, Keying and Diving will occur. Thus an analytical model is established to describe the comprehensive kinematic behavior of deepwater anchors in the seabed. By applying the analytical model to predict the kinematic trajectory of drag anchors in the seabed and comparing the results with the published analytical methods and centrifuge test data, the validity of the analytical model is verified.