收藏本站
《天津大学》 2012年
收藏 | 手机打开
二维码
手机客户端打开本文

Penetration Mechanism and Kinematic Behavior of Drag Anchors

WeiZhang  
【摘要】:With resource exploitation reaching deep and ultra-deep waters more often, large floating structures such as the FPSO, Spar and SEMI combining with sufficiently effective and reliable mooring systems are becoming increasingly popular in deepwater offshore engineering. Because of better performances both in pullout capacity and deepwater installation, drag anchors, including the vertically loaded plate anchors, are increasingly applied and play a key role in deepwater mooring systems. The penetration mechanism and kinematic behavior of the drag anchor in seabed soils is not only a complicated engineering problem, but also an interesting topic with lots of scientific meanings. In this dissertation, some fundamental problems that are closely related to the penetration mechanism and kinematic behavior of drag anchors are systematically investigated by synthetically employing theoretical and experimental methods. Firstly, a contact measurement technique, which is based on the knowledge of the motion characteristic of the drag anchor in soils, is developed and applied in measuring the trajectory of the anchor models. This technique is easier to perform and has little effect on the behavior of drag anchors in soils. The measurement precision and applicability of the technique are verified through specially designed experiments. Being an important application, the measurement technique is adopted to detect the movement direction of the anchor with an arbitrary fluke section. The present work has demonstrated that, through model tests and employing the developed technique, the movement direction of any type of drag anchor can be effectively and easily determined. Secondly, five fundamental problems closely relevant to the penetration mechanism and kinematic behavior of drag anchors, including the effects of the initial orientation of the anchor, the effects of the shank angle, the relationship between the drag distance and the anchor displacement in soil, the relationship between the fluke orientation and the drag angle at the shackle, and the movement direction of the anchor, are investigated through model experiments. By systematically analyzing the kinematic parameters and trajectories of the anchor, further knowledge of the five fundamental problems, which is believed to be beneficial to improving our understanding on the penetration mechanism and kinematic behavior of drag anchors, is clearly obtained. Thirdly, an analytical method that is capable of predicting the movement direction of the drag anchor with an arbitrary fluke section in both cohesive and noncohesive soils is developed. The analytical method is verified by experiments and applied to predicting the movement direction of the anchor with rectangular and wedge-shaped sections, and clear prediction results are obtained. Some important features of the movement direction are revealed, especially the step change of the movement direction from the unstable to the stable penetration stages due to the anchor weight. The present work proves that the movement direction of the drag anchor with an arbitrary fluke section can be reasonably determined by the developed analytical method. Finally, the interactional properties between the drag anchor and the installation line are theoretically and experimentally investigated. Based on the mechanical models for the embedded line and the drag anchor, analytical expressions that can predict the drag force at the shackle in both cohesive and noncohesive soils are derived. Analytical methods that can predict not only the variational property but also the exact value of the drag angle at the shackle during penetration of the anchor are also developed. In order to examine the developed analytical methods, experimental data are adopted to compare the predicted drag force and drag angle at the shackle. Meanwhile, a detailed parametric analysis is performed to explore the effects of different parameters on the drag force and the drag angle, and to determine the reasonable values of several key parameters.
【学位授予单位】:

知网文化
【相似文献】
中国期刊全文数据库 前20条
1 张朋;LONG Yan-cheng;LUO Bing;;Prestressed tensioning method and its application to testing anchor stress of anchor cables for side-slope stabilization[J];Journal of Chongqing University(English Edition);2017年01期
2 Lu Aihong;Xu Jinhai;Liu Haishun;;Effect of a preload force on anchor system frequency[J];International Journal of Mining Science and Technology;2013年01期
3 李夕兵,周子龙,李启月,胡柳青;Parameter analysis of anchor bolt support for large-span and jointed rock mass[J];Journal of Central South University of Technology(English Edition);2005年04期
4 吴顺川,张友葩,高永涛;Study on range interval distance of prestressed anchor bars using update backpropagation neural network[J];Journal of Coal Science & Engineering(China);2003年02期
5 蒲石;祁荣宾;靳文浩;钱锋;;Path Planning for Mobile Anchor Node in Localization Based on Ad-Hoc Localization Algorithm[J];Journal of Donghua University(English Edition);2014年02期
6 谢桂华;刘荣桂;陈蓓;李明君;石天罡;;Synergistic effect of a new wedge-bond-type anchor for CFRP tendons[J];Journal of Central South University;2015年06期
7 ;Finite element analysis of anchor plates using non-coaxial models[J];Journal of Rock Mechanics and Geotechnical Engineering;2010年02期
8 ;A novel durable intelligent fiber reinforced polymer anchor with embedded optical fiber Bragg grating sensors[J];Science China(Technological Sciences);2012年05期
9 ;Elastic-plastic analysis for pile-anchor supporting system of deep foundation pit[J];Global Geology;2009年04期
10 Cun Hu;Fu-Ping Gao;;Elasto-plasticity and pore-pressure coupled analysis on the pullout behaviors of a plate anchor[J];Theoretical & Applied Mechanics Letters;2015年02期
11 ;Numerical simulation of the effect of coupling support of bolt-mesh-anchor in deep tunnel[J];Mining Science and Technology;2009年03期
12 徐圣康;熊为;罗斌;查昆;刘家国;张劲松;赵猛;;膝关节后内侧Burks and SchaVer’s入路结合Anchor钉内固定治疗后交叉韧带止点撕脱骨折[J];中国骨与关节损伤杂志;2012年06期
13 金鸿章;綦志刚;周颋;李冬松;;Research on roll stabilization for ships at anchor[J];Journal of Marine Science and Application;2008年04期
14 ;Study on mechanism of fiber grouted material in pre-stressed anchor rope[J];Science in China(Series E:Technological Sciences);2003年S1期
15 王栋;胡玉霞;金霞;;Two-Dimensional Large Deformation Finite Element Analysisfor the Pulling-up of Plate Anchor[J];China Ocean Engineering;2006年02期
16 张炜;刘海笑;李新仲;李清平;曹静;;An Analytical Method for Positioning Drag Anchors in Seabed Soils[J];China Ocean Engineering;2015年01期
17 刘海笑;;拖曳嵌入式板锚在中国的研究近况(英文)[J];Journal of Marine Science and Application;2012年04期
18 肖淑君;陈昌富;;Mechanical mechanism analysis of tension type anchor based on shear displacement method[J];Journal of Central South University of Technology;2008年01期
19 G. A. Aggidis;;Developments, Expectations of Wave Energy Converters and Mooring Anchors in the UK[J];Journal of Ocean University of China;2008年01期
20 Alan Showkati;Parviz Maarefvand;Hossein Hassani;;Stresses induced by post-tensioned anchor in jointed rock mass[J];Journal of Central South University;2015年04期
中国重要会议论文全文数据库 前10条
1 ;Carrying Capacity of Anchor Slab[A];Selected Works of Geotechnical Engineering----Special Volume in Commemoration of the Golden Jubilee of ISSMFE[C];1983年
2 方伟松;俞佳烽;邵汝谊;;Anchor钉在膝关节内侧副韧带下止点部断裂治疗中的应用[A];2007年浙江省医学会骨科学学术会议暨浙江省抗癌协会骨软肿瘤学术会议论文汇编[C];2007年
3 方伟松;俞佳烽;邵汝谊;;Anchor钉在膝关节内侧副韧带下止点部断裂治疗中的应用[A];浙江省中西医结合学会骨伤科专业委员会第十四次学术年会暨省级继续教育学习班论文汇编[C];2008年
4 方伟松;俞佳烽;邵汝谊;;Anchor钉在膝关节内侧副韧带下止点部断裂治疗中的应用[A];2008年浙江省骨科学学术年会论文汇编[C];2008年
5 Xufeng Wen;Jinming Hao;Xiaogong Hu;Chengpan Tang;Dongxia Wang;Jie Xin;Bo Jiao;Jing Wang;;Centralized Autonomous Orbit Determination of Beidou Satellites Under the Constraint of Anchor Station[A];第九届中国卫星导航学术年会论文集——S04 卫星轨道与钟差[C];2018年
6 ;The Influence Analysis of Shear Resistance on Pretightening Force in Foundation Anchor of Column Base[A];钢结构工程研究(七)——中国钢结构协会结构稳定与疲劳分会2008年学术交流会论文集[C];2008年
7 Linsong Wang;Junmin Wang;Mingzhang Luo;Chao Chen;Qiuge Wang;Kun Wang;;The Application of HHT Method Used in the Anchor Bolt Testing Signal[A];2012年计算机应用与系统建模国际会议论文集[C];2012年
8 黄学员;苏博源;曾展鹏;;微型Anchor钉重建术配合中药熏洗治疗指伸肌腱止点断裂[A];中华中医药学会骨伤分会第四届第二次会议论文汇编[C];2007年
9 Shi Qinqin;Wang Dongyu;Xu Qiang;Zhang Jianping;;An Improved DV-Hop Scheme Based on Similar Path Searching and Quasi-Newton Iterative Algorithm[A];第30届中国控制与决策会议论文集(5)[C];2018年
10 ;THE RESEARCH OF ACOUSTIC WAVE NON-DESTRUCTIVE EXAMINATION TECHNOLOGY FOR ANCHORING QUALITY OF ANCHORED BOLT[A];Proceedings of the 2010 Symposium on Piezoelectricity,Acoustic Waves and Device Applications[C];2010年
中国重要报纸全文数据库 前1条
1 丁大勇;试用Linux的法宝[N];中国计算机报;2002年
中国博士学位论文全文数据库 前2条
1 WeiZhang;[D];天津大学;2012年
2 王伟东;移动传感器网络定位技术研究[D];电子科技大学;2008年
中国硕士学位论文全文数据库 前2条
1 褚进;MG环境下Anchor公司经营战略的制定与实施[D];东北大学 ;2008年
2 凌明坤;基于CSS技术的车辆定位与控制系统设计与研究[D];华北电力大学(北京);2016年
中国知网广告投放
 快捷付款方式  订购知网充值卡  订购热线  帮助中心
  • 400-819-9993
  • 010-62982499
  • 010-62783978