Numerical investigation of spudcan-footprint interaction in non-uniform clays
Numerical investigation of spudcan-footprint interaction in non-uniform clays
复制标题
非均匀粘土中桩钉-足迹相互作用的数值研究
DOI：
10.1016/j.oceaneng.2019.106295
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发表时间：
2019-09
影响因子：
5
通讯作者：
Wang D
中科院分区：
文献类型：
--
作者：
Zheng J;Wang D
在先前安装留下的现有占地面积附近重新安装自升式钻井平台可能会出现问题，因为自升式钻井平台基脚和钻井平台上会产生水平和力矩载荷。本文报道了非均匀粘土沉积物中泥罐-足迹相互作用的大变形有限元分析结果。数值模型的性能进行了验证，通过模拟现有的离心试验。对不同的影响因素进行了详细的参数研究，这些影响因素包括形成足迹的初始预埋罐穿透深度、预埋罐直径、土壤敏感性、不排水剪切强度剖面以及预埋罐和足迹中心之间的偏移距离。这些因素对垂直，水平和力矩载荷的发展的影响进行了量化，并在不同的偏移距离的诱导水平和力矩载荷的峰值幅度进行了比较。通过数值分析发现，临界偏移距离，最大限度地提高峰值水平和力矩载荷的penduncan，范围为0.5和0.75倍的直径的penduncan用于形成的足迹。相比之下，对于用于初始穿透和重新安装的那些，1.5-2.0倍的偏移距离能够导致对重新安装的足迹的最小影响。
The re-installation of jack-up rigs near an existing footprint left by the previous installation can be problematic due to the development of horizontal and moment loads on the spudcan footing and hence on the rigs. This paper reports large deformation finite element results of spudcan-footprint interaction in non-uniform clay deposits. The performance of the numerical model was verified by simulations of existing centrifuge tests. A detailed parametric study was carried out varying influential factors including the initial spudcan penetration depth to form the footprint, spudcan diameters, soil sensitivity, undrained shear strength profile and the offset distance between spudcan and footprint centres. The effects of these factors on the development of the vertical, horizontal and moment loads are quantified, and the peak magnitudes of the induced horizontal and moment loads at different offset distances are then compared. It is found through the numerical analyses that the critical offset distance, which maximises the peak horizontal and moment loads on the spudcan, ranges between 0.5 and 0.75 times the diameter of the spudcan used for the formation of the footprint. By contrast, an offset distance of 1.5–2.0 times the diameter of the larger spudcan of those used for initial penetration and re-installation is able to result in a minimal influence of the footprint on the re-installation.
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影响因子：
5.8
作者：
M. Hossain;Jingbin Zheng;A. Huston
通讯作者：
M. Hossain;Jingbin Zheng;A. Huston
影响因子：
3.6
作者：
Dong Wang;D. White;M. Randolph
通讯作者：
Dong Wang;D. White;M. Randolph
影响因子：
5.8
作者：
O. Purwana;C. Leung;Y. Chow;K. Foo
通讯作者：
O. Purwana;C. Leung;Y. Chow;K. Foo
DOI：
--
发表时间：
1987
期刊：
--
影响因子：
--
作者：
Rapoport;A. Young
通讯作者：
Rapoport;A. Young
影响因子：
5.8
作者：
Jingbin Zheng;M. Hossain;Dong Wang
通讯作者：
Jingbin Zheng;M. Hossain;Dong Wang