吸力贯入式板锚(SEPLA)是一种系泊深海浮式结构的新型基础,在转动上拔的过程中其埋深和承载力会不断减小。采用包络面塑性极限分析方法,对吸力贯入式板锚在其转动上拔的过程中的埋深损失和承载力进行了模拟分析,并考虑锚链、土和板锚的相互作用。研究了切向偏心、锚链泥线夹角等参数对埋深损失、板锚转角、承载力的影响,并与离心机模型试验数据验证。研究结果表明,随着锚眼切向偏心的增大,板锚埋深损失逐渐减小,甚至出现埋深增大的现象,但相应的承载力显著降低。当偏心比ep/en<0.1时,板锚的承载力基本不变;当ep/en>0.1后,板锚的承载力随ep/en增大而减小。泥线处锚链倾角越小时,板锚的转动角度越小,获得的承载力效果越好。 The suction penetration plate anchor (SEPLA) is a new type of foundation for the mooring deep-sea floating structure, its depth and bearing capacity will continue to decrease during the process of rotating and pulling. The plastic limit analysis method of envelope is used to simulate and analyze the buried depth loss and bearing capacity of suction penetration plate anchor during its rotation and the interaction between anchor chain, soil and plate anchor is considered. The effects of the parameters of tangential eccentricity and mudline angle of anchor chain on the buried depth, the anchor angle and the bearing capacity of the anchor were studied, and the results were validated by centrifuge model test data. The results show that with the increase of tangential eccentricity of anchors, the loss of depth of plate anchorage decreases gradually and even the depth of the plate increases, but the corresponding bearing capacity decreases significantly. When the eccentricity ratio ep / en <0.1, the bearing capacity of plate anchor is basically unchanged; when ep / en> 0.1, the bearing capacity of plate anchor decreases with the increase of ep / en. When the inclination of anchor chain at mudline is smaller, the smaller the rotation angle of anchor is, the better the bearing capacity is obtained.