吸力贯入式板锚转动上拔过程的数值模拟研究
发布时间：2018-07-24 16:59
【摘要】：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/en0.1时,板锚的承载力基本不变;当ep/en0.1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。
[Abstract]:The suction penetration plate anchor (SEPLA) is a new foundation of mooring deep sea floating structure, and its burying depth and bearing capacity will decrease in the course of turning and pulling. By using the envelope plastic limit analysis method, the buried depth loss and the bearing capacity of the suction penetration plate anchor during its rotation are simulated and analyzed, and the interaction of the anchor chain, soil and the plate anchor is considered. The effects of tangential eccentricity and the angle between anchor and mud line on the loss of buried depth, the rotation angle of plate anchor and the bearing capacity are studied, and the results are verified by the centrifuge model test data. The results show that with the increase of the tangential eccentricity of the anchor hole, the loss of the buried depth of the plate anchor decreases gradually, and even increases, but the corresponding bearing capacity decreases significantly. When the eccentricity ratio is ep/en0.1, the bearing capacity of the plate anchor is basically unchanged, and the bearing capacity of the plate anchor decreases with the increase of ep/en after ep/en0.1. The smaller the inclined angle of anchor chain is, the smaller the rotation angle of plate anchor is, and the better the bearing capacity is.
【作者单位】： 中国石油大学(华东)船舶与海洋工程系;
【基金】：国家自然科学基金项目(51179201) 中央高校基本科研业务费专项资金项目(15CX05040A)
【分类号】：P751;TU476
本文编号：2142046
[Abstract]:The suction penetration plate anchor (SEPLA) is a new foundation of mooring deep sea floating structure, and its burying depth and bearing capacity will decrease in the course of turning and pulling. By using the envelope plastic limit analysis method, the buried depth loss and the bearing capacity of the suction penetration plate anchor during its rotation are simulated and analyzed, and the interaction of the anchor chain, soil and the plate anchor is considered. The effects of tangential eccentricity and the angle between anchor and mud line on the loss of buried depth, the rotation angle of plate anchor and the bearing capacity are studied, and the results are verified by the centrifuge model test data. The results show that with the increase of the tangential eccentricity of the anchor hole, the loss of the buried depth of the plate anchor decreases gradually, and even increases, but the corresponding bearing capacity decreases significantly. When the eccentricity ratio is ep/en0.1, the bearing capacity of the plate anchor is basically unchanged, and the bearing capacity of the plate anchor decreases with the increase of ep/en after ep/en0.1. The smaller the inclined angle of anchor chain is, the smaller the rotation angle of plate anchor is, and the better the bearing capacity is.
【作者单位】： 中国石油大学(华东)船舶与海洋工程系;
【基金】：国家自然科学基金项目(51179201) 中央高校基本科研业务费专项资金项目(15CX05040A)
【分类号】：P751;TU476
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，本文编号：2142046
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