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浙江大学学报(理学版)  2020, Vol. 47 Issue (2): 253-260    DOI: 10.3785/j.issn.1008-9497.2020.02.016
海洋科学     
鱼雷锚在钙质砂床中的贯入深度研究
王呈1,2, 陈晓辉1,2, 喻国良1,2
1.上海交通大学 船舶海洋与建筑工程学院 海洋工程国家重点实验室, 上海 200240
2.上海交通大学 高新船舶与深海开发装备协同创新中心,上海 200240
The study on penetration depth of a torpedo anchor in calcareous sandy bed
WANG Cheng1,2, CHEN Xiaohui1,2, YU Guoliang1,2
1.State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China
2.Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiaotong University, Shanghai 200240, China
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摘要: 鱼雷锚安装简单、快速,是一种在海洋工程中具有良好应用前景的锚固结构,其在钙质砂床的贯入深度关乎其系泊结构物的稳定性和抗风浪能力。基于耦合的SPH (光滑粒子流体动力学法)和FEM (有限元法)算法,针对Richardson(2008)研究的鱼雷锚建立了有限元模型,在Abaqus平台上,数值模拟了该鱼雷锚在钙质砂床中的贯入深度,并模拟了不同的贯入速度、锚重量和锚-土界面间的摩擦系数等对鱼雷锚贯入深度的影响。通过对比数值模拟结果与Richardson(2008)提供的实验结果可知,耦合的SPH-FEM算法可以快速准确地模拟鱼雷锚在钙质砂床中的贯入深度。此外,由参数化研究可知,鱼雷锚的锚重、贯入速度和锚-土间摩擦系数对鱼雷锚的贯入深度影响显著。特别地,当贯入速度大于某一临界值时,贯入深度基本上与贯入速度成正比。最后,基于Richardson实验数据和本次数值模拟获得的65组数据,从能量法的角度提出了鱼雷锚在钙质砂床中贯入深度的预测公式,为动力锚的设计和应用提供理论支撑。此外,经初步验证,该公式也可用于预测DPAⅢ动力贯入锚在钙质砂床中的贯入深度。
关键词: 鱼雷锚SPHFEM贯入深度钙质砂床DPAⅢ动力贯入锚    
Abstract: Torpedo anchor is a kind of anchorage structure with good application prospects due to its simple, fast and economical installation in ocean engineering. The penetration depth of the torpedo anchor in calcareous sandy bed is crucial to obtain its sufficient holding force for its moored structure. In this study, the torpedo anchor studied by RICHARDSON (2008) is used. Then, based on the coupled SPH (smooth particle hydrodynamics) and FEM (finite element method), the penetration depth of the torpedo anchor in calcareous sandy bed is simulated on Abaqus platform. In the numerical simulation, the influences of the impact velocity, anchor weight and friction coefficient between anchor and soil interface on the penetration depth are studied comprehensively. By comparing the numerical simulation results with the experimental results obtained by RICHARDSON (2008),we show that the coupled SPH-FEM algorithm is able to quickly and accurately simulate the penetration depth of torpedo anchor in sandy seabed. Besides, according to parametric study, the weight and impact velocity of torpedo anchor and the friction coefficient between anchor and soil would have significant influence on the penetration depths. Specifically, when the impact velocity is larger than a critical value, the penetration depth would vary approximately linearly along with the impact velocity. Finally, based on Richardson’s experimental data and 65 sets of numerical data obtained herein, an energy method is proposed to predict the penetration depth of torpedo anchor in calcareous sandy bed, which can be used for the design of dynamic anchor. Furthermore, this method is also applicable to the prediction of the penetration depth of DPA III dynamically installed anchor in calcareous sandy bed.
Key words: torpedo anchor    SPH    FEM    penetration depth    calcareous sandy bed    DPAIII dynamically installed anchor
收稿日期: 2019-07-17 出版日期: 2020-03-25
CLC:  U653.2  
基金资助: 教育部联合基金资助项目(6141A02022337).
通讯作者: ORCID:https://orcid.org/0000-0002-6845-1508,E-mail:yugl@sjtu.edu.cn.     E-mail: yugl@sjtu.edu.cn
作者简介: 王呈(1991—),ORCID:https://orcid.org/0000-0003-2330-9222, 男,博士研究生,主要从事海洋工程研究,E-mail:wangcheng502781301@sjtu.edu.cn.
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引用本文:

王呈, 陈晓辉, 喻国良. 鱼雷锚在钙质砂床中的贯入深度研究[J]. 浙江大学学报(理学版), 2020, 47(2): 253-260.

WANG Cheng, CHEN Xiaohui, YU Guoliang. The study on penetration depth of a torpedo anchor in calcareous sandy bed. Journal of Zhejiang University (Science Edition), 2020, 47(2): 253-260.

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https://www.zjujournals.com/sci/CN/10.3785/j.issn.1008-9497.2020.02.016        https://www.zjujournals.com/sci/CN/Y2020/V47/I2/253

1 董天宏,黄海科,柯鹏飞.鱼雷锚的方向稳定性研究[J]. 广东造船, 2015(4):24-27. DONGT H, HUANGH K, KEP F. Directional stability of torpedo anchors[J]. Guangdong Shipbuilding,2015(4): 24-27.
2 喻国良,王闻恺,王呈.动力型鱼雷锚基本结构与特性[J]. 海洋工程, 2018,36(2):143-148. DOI:10.16483/j.issn.1005-9865.2018.02.017 YUG L, WANGW K, WANGC. The structure and characteristics of powered torpedo anchor[J]. The Ocean Engineering, 2018, 36(2):143-148.DOI:10.16483/j.issn.1005-9865.2018.02.017
3 WANGC, ZHANGM X, YUG L. Penetration depth of torpedo anchor in two-layered cohesive soil bed by free fall[J]. China Ocean Engineering, 2018, 32(6): 706-717. DOI:10.1007/s13344-018-0072-3
4 WANGW K, WANGX F, YUG L. Vertical holding capacity of torpedo anchors in underwater cohesive soils[J]. Ocean Engineering, 2018, 161: 291-307. DOI:10.1016/j.oceaneng.2018.05.018
5 RICHARDSONM D. Dynamically Installed Anchors for Floating Offshore Structures[D]. Perth:University of Western Australia, 2008.
6 RICHARDSONM D, O’LOUGHLINC D, RANDOLPHM F, et al. Setup following installation of dynamic anchors in normally consolidated clay [J]. Journal of Geotechnical and Geoenvironmental Engineering, 2009, 135(4): 487-496.DOI:10.1061/(asce)1090-0241(2009)135:4(487)
7 LIUH X, XUK, ZHAOY B. Numerical investigation on the penetration of gravity installed anchors by a coupled Eulerian–Lagrangian approach[J]. Applied Ocean Research, 2016, 60: 94-108.DOI:10.1016/j.apor.2016.09.002
8 O’BEIRNEC, O’LOUGHLINC D, WANGD, et al. Capacity of dynamically installed anchors as assessed through field testing and three-dimensional large-deformation finite element analyses[J]. Canadian Geotechnical Journal, 2014, 52(5): 548-562. DOI:10.1139/cgj-2014-0209
9 WANGC, CHENX H, YUG L. Maximum force of inclined pullout of a torpedo anchor in cohesive beds[J]. China Ocean Engineering,2019, 33(3):333-343.DOI:10.1007/s13344-019-0032-6
10 ZHANGN, EVANST M. Discrete numerical simulations of torpedo anchor installation in granular soils[J]. Computers and Geotechnics, 2019, 108:40-52. DOI:10.1016/j.compgeo.2018.12.013
11 马红旗. 鱼雷锚初始贯入海床深度的研究[D]. 天津:天津大学, 2010. MAH Q. Research on Initial Penetration of Torpedo Anchor into Seabed Soil[D]. Tianjin: Tianjin University, 2010.
12 池寅,时豫川,吴海洋,等.砂质海床中船锚运动全过程数值模[J]. 武汉大学学报(工学版),2017,50(6):807-814. CHIY, SHIY C, WUH Y, et al. Numerical simulation of whole movement process of an anchor in sandy seabed[J].Journal of Wuhan University(Engineering Edition),2017,50(6):807-814.
13 BOJANOWSKIC. Numerical modeling of large deformations in soil structure interaction problems using FE, EFG, SPH, and MM-ALE formulations[J]. Archive of Applied Mechanics, 2014, 84(5): 743-755. DOI:10.1007/s00419-014-0830-5
14 ZHOUL, LIUH X, ZHAOY B. Large deformation numerical analysis of the ultimate pullout capacity of plate anchors in sand[C]//The 26th International Ocean and Polar Engineering Conference. Rhodes,Greece: International Society of Offshore and Polar Engineers, 2016.
15 PARKJ S, PARKD. Vertical bearing capacity of bucket foundation in sand overlying clay[J]. Ocean Engineering, 2017, 134:62-76.DOI:10.1016/j.oceaneng.2017.02.015
16 O’LOUGHLINC D , GAUDINC , RANDOLPHM F , et al. Penetration of dynamically installed anchors in clay [J]. Géotechnique, 2013, 63(11):909-919.
17 CHOWS H, O'LOUGHLINC D, GAUDINC, et al. An experimental study of the embedment of a dynamically installed anchor in sand[C]//Proceedings of the 8th Offshore Site Investigation and Geotechnics Conference (OSIG17). London: Society for Underwater Technology,2017: 1019-1025.
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