半潜式试验平台性能及建造安装分析

发布时间：2018-06-27 12:17

本文选题：半潜式试验平台 + 水动力性能　；参考：《浙江大学》2014年硕士论文

【摘要】：能源是人类社会进步与发展的重要资源。随着海洋油气资源的开采不断地向深海推进,相关领域的采油平台技术也越来越受到人们的重视。半潜式平台因其可变荷载大、抗风能力强、适应水深范围广等优点而在世界范围内得到了广泛的应用。因而如何通过对半潜式浮式平台及其系泊系统全面的水动力性能分析和平台结构强度的计算,为平台的设计优化提供一定的参考,提高其运行可靠性就具有了重要的意义。本文选取—小型半潜式试验平台为研究对象,对其水动力特性和结构强度进行了分析研究。论文主要工作包括以下几个方面 (1)、半潜式试验平台详细介绍作为国内首艘仅用于科学试验的小型半潜式试验平台,本文对其总的设计方案、基本布置、工程环境等情况做了详细的介绍。 (2)、平台及其系泊系统水动力性能分析利用ANSYS-AQWA软件,根据三维势流理论对该半潜式试验平台进行频域计算,得到平台在各个频率和浪向下的运动响应幅值算子(RAO);并对试验平台及其系泊系统在风浪流环境作用下的水动力性能进行时域耦合数值模拟,选取的海洋环境包括平台作业海况和自存海况,通过模拟得到试验平台在特定海洋环境条件下的六自由度运动以及锚链的受力和锚体是否会发生走锚等情况。同时,在原试验平台的基础上,通过参数的变化,研究平台主体重心高度的改变所引起的平台运动响应的变化规律。 (3)、平台整体有限元强度分析采用ANSYS有限元分析模块建立本试验平台的整体模型,对其在多种工况下的结构强度进行整体分析,给出了本试验平台在结构方面较薄弱的部分,验证了平台结构设计的安全及合理性。 (4)、平台建造安装分析介绍了整个试验平台的建造方法及抛锚至海域的过程,可为相关工程人员和高校在校生提供实际工程借鉴。本文围绕我国第一艘仅用于科学试验的半潜式海洋平台,对平台及其系泊系统的水动力特性和锚链情况进行了全面的分析,研究了半潜式试验平台整体结构强度情况,并重点介绍了平台建造方法和抛锚过程,研究内容可为类似平台的设计、选型和优化提供参考,并为相关人员提供实际工程建造安装经验。
[Abstract]:Energy is an important resource for the progress and development of human society. With the development of offshore oil and gas resources, more and more attention has been paid to the platform technology in related fields. Semi-submersible platform has been widely used in the world because of its large variable load, strong wind resistance and wide range of water depth. So how to analyze the hydrodynamic performance of the semi-submersible floating platform and its mooring system and calculate the structural strength of the platform can provide a certain reference for the platform design optimization and improve the reliability of the platform. In this paper, the hydrodynamic characteristics and structural strength of a small semi-submersible test platform are studied. The main work of this paper includes the following aspects: (1) the semi-submersible test platform is introduced in detail as the first small semi-submersible test platform which is only used for scientific test in China. The hydrodynamic performance of the platform and its mooring system is analyzed by using ANSYS-AQWA software. According to the three-dimensional potential flow theory, the frequency domain calculation of the semi-submersible test platform is carried out. The amplitude operator (Rao) of motion response of the platform at various frequencies and waves down is obtained, and the hydrodynamic performance of the test platform and its mooring system under wind and wave environment is simulated numerically in time domain. The selected marine environment includes the operating sea conditions and self-stored sea conditions of the platform. The motion of six degrees of freedom of the test platform under the specific marine environment conditions and the force of the anchor chain and whether the anchor body will take place are obtained by simulation. At the same time, on the basis of the original test platform, through the change of parameters, The dynamic response of the platform caused by the change of the height of the center of gravity of the platform is studied. (3) the finite element strength analysis of the whole platform is carried out by using ANSYS finite element analysis module to establish the whole model of the test platform. The structural strength of the platform under various working conditions is analyzed as a whole, and the weak part of the test platform in structure is given. The safety and rationality of the platform structure design are verified. (4) the construction method of the whole test platform and the process of dropping anchor to sea area are introduced. It can provide practical engineering reference for related engineers and college students. In this paper, the hydrodynamic characteristics of the first semi-submersible offshore platform and its mooring system are comprehensively analyzed, and the overall structural strength of the semi-submersible test platform is studied. The method of platform construction and the process of anchoring are emphatically introduced. The research contents can provide reference for the design, selection and optimization of similar platforms, and provide practical engineering construction and installation experience for relevant personnel.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P742

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