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Large deformation finite element analysis investigating the performance of anchor keying flap

机译：大变形有限元分析，研究锚固键瓣的性能

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摘要

Suction embedded plate anchors, as used in practice, include a hinged keying flap aligned with the main anchor plate (fluke). The flap was designed to rotate away from the shank during keying of the anchor, to minimise loss of anchor embedment and the associated reduction in pull-out resistance. However, it has been observed experimentally that the flap is activated only once keying is nearly completed, and thus does not assist in reducing embedment loss. In this paper, the performance of the keying flap is investigated using a large deformation finite element approach based on frequent mesh regeneration. The moment acting at the flap hinges, determined from the soil pressures and shear forces on the keying flap, is quantified. The moment controlling the flap activation depends mainly on the net soil pressure on the front or back face of the flap, and this prevents activation of the flap while the anchor is rotating significantly. The flap is only activated once the anchor motion becomes dominated by forward translation, normal to the plate. Various factors affecting flap activation and embedment loss are explored, including flap height, eccentricity of the padeye, soil strength profile, initial anchor depth and load inclination.
机译：在实践中使用的嵌入式吸盘式锚包括与主锚板（plate子）对齐的铰接键舌。襟翼设计为在锚定键期间从柄旋转离开，以最大程度地减少锚嵌入的损失和相关的拉出阻力降低。然而，已经通过实验观察到，仅在几乎完成键控之后才激活襟翼，因此不能帮助减少嵌入损失。本文采用基于频繁网格再生的大变形有限元方法研究了键控襟翼的性能。量化作用在襟翼铰链上的力矩，该力矩由土壤压力和键控襟翼上的剪切力确定。控制襟翼激活的力矩主要取决于襟翼正面或背面的净土压力，这会在锚固件明显旋转时阻止襟翼激活。仅当锚定运动由垂直于平板的向前平移控制时，才激活襟翼。探索了影响襟翼激活和嵌入损失的各种因素，包括襟翼高度，垫眼的偏心率，土壤强度分布，初始锚固深度和荷载倾斜度。

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  • 来源
    《Ocean Engineering》 |2013年第1期|107-116|共10页
  • 作者

    D. Wang; C. Gaudin; M.F. Randolph;

  • 作者单位

    Centre for Offshore Foundation Systems, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia;

    Centre for Offshore Foundation Systems, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia;

    Centre for Offshore Foundation Systems, The University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    anchors; capacity; clay; design; numerical analysis;

    机译：锚容量;粘土;设计;数值分析;

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