Dissertation
Dissertation > Industrial Technology > Arms industry > Underwater weapons > Torpedo and its launcher > General issues

Research on Initial Penetration of Torpedo Anchor into Seabed Soil

Author MaHongQi
Tutor ZhangWei
School Tianjin University
Course Port, Coastal and Offshore Engineering
Keywords Torpedo anchor Initial buried depth Directional stability Three-dimensional numerical simulation Dynamic Analysis Fluid-structure interaction
CLC TJ630
Type Master's thesis
Year 2010
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In the process of exploitation of oil, natural gas and other energy resources in the deep and ultra-deep waters , deep water mooring - based construction and installation costs with the deepening of the water depth increases , therefore , low cost and high uplift performance anchor mooring - based research and development have become a necessity . Torpedo anchor is easy to install , low cost and high bearing capacity , a new type of the most promising deep water mooring basis . Torpedo anchor installation process analysis, differential equations of motion process , MATLAB platform , the use of Runge - Kutta numerical algorithm for solving differential equations to obtain the the torpedo anchor anchor speed its penetration depth changes in relationships , and further study of the nature of sea Chuangtu body , install the release height , anchor size (ie anchor weight) torpedo anchor the initial penetration depth penetration sea Chuangtu body , a number of laws . Secondly, the use of the basic theory of hydrodynamic stability of a brief analysis of the direction of the torpedo anchor installation process . Finally, the finite element software ANSYS / LS - DYNA program , the soil as an elastic-plastic material , the use of non-reflective boundary ( non -reflection boundary ) , establish a dynamic numerical analysis model of the torpedo anchor installation process , the main sea - bed soil body nature of the torpedo anchor installation initial penetration depth and speed torpedo anchor penetration depth and time history curve . By contrast, the analytical calculation are in good agreement with the numerical results .

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