卷管式铺管法施工卷盘过程研究

发布时间：2018-10-24 21:39

【摘要】：在海洋油气资源的开发过程中，海底管道是不可或缺的组成部分。海底管道主要用于对海底石油和天然气的生产和运输。由于海底管道铺设工艺复杂，海洋环境复杂多变，海底管道铺设的难度比陆地铺设要大的多，因此对海底管道铺设的施工工艺的研究十分重要。目前海底管道的铺设的方法主要有：S型铺管法、J型铺管法、卷管式铺管法和拖拽式铺管法。本文对这几种铺管方法分布进行了介绍，并主要介绍卷管式铺管法的相关内容。卷管式铺管法是20世纪末开始发展起来的一种海洋铺管方法。这种方法的铺管效率高，费用相对较低，已经在许多国家得到应用。本文主要介绍卷管式铺管法的施工过程，并针对铺管过程中管道上卷这一过程进行分析研究。在一定的假设和简化的基础上，对管道在上卷过程中的受力进行了理论分析计算。并结合有限元方法，运用Abaqus有限元分析软件，建立管道上卷的模型，并对管道上卷的受力模型进行分析和计算，为工程施工提供理论依据和参考。本文的主要研究内容有以下几方面：（1）文章对几种海底管道的铺设方法及各自的特点进行了介绍。并重点对卷管式铺管法的施工流程进行介绍，提出了为确保施工顺利进行的注意事项，为施工过程的项目管理提供参考。（2）针对管道上卷的过程，，对管道的受力进行了详细的分析研究。用理论计算的方法，对管道在弹性阶段内的弯曲进行受力分析。分析管道在弹性阶段内能够达到的最大弯矩程度，为塑性分析提供理论基础。（3）对管道在纯弯曲的状态下进行分析研究。按照是否考虑材料的强化，通过理论计算和有限元分析，计算管道的受力状态。找出了弯矩和曲率之间的关系。（4）根据实际工程情况，管道上卷过程受到轴向力和弯矩的共同作用。通过运用理论计算和有限元分析相结合的方法，对管道在受到拉弯共同作用下的应力和变形状态进行分析。为工程施工过程中施加轴力和弯矩，选取合适的圆盘提供参考。
[Abstract]:In the process of exploitation of offshore oil and gas resources, submarine pipeline is an indispensable part. Submarine pipelines are mainly used for the production and transportation of submarine oil and gas. Because the submarine pipeline laying technology is complex and the marine environment is complex and changeable, the submarine pipeline laying is much more difficult than the land laying, so it is very important to study the construction technology of submarine pipeline laying. At present, the main methods of submarine pipeline laying are: S-type laying method, J type pipe laying method, winding pipe laying method and towing laying method. This paper introduces the distribution of these pipe laying methods, and mainly introduces the related contents of the coil pipe laying method. Winding pipe laying method is a kind of ocean pipe laying method which began to develop at the end of the 20th century. This method has been applied in many countries because of its high efficiency and low cost. This paper mainly introduces the construction process of winding pipe laying method, and analyzes and studies the process of pipe winding in the course of pipe laying. On the basis of certain assumptions and simplification, the stress of pipeline in the process of winding is theoretically analyzed and calculated. Combined with finite element method, the model of pipeline coiling is established by using Abaqus finite element analysis software, and the stress model of pipeline coiling is analyzed and calculated, which provides theoretical basis and reference for engineering construction. The main contents of this paper are as follows: (1) this paper introduces several laying methods and their characteristics of submarine pipelines. The paper mainly introduces the construction process of the coiled pipe laying method, puts forward the points for attention in order to ensure the smooth construction, and provides the reference for the project management of the construction process. (2) aiming at the process of the pipeline coiling, The stress of pipeline is analyzed and studied in detail. The bending force of pipeline in elastic stage is analyzed by the method of theoretical calculation. The maximum bending moment of pipeline in elastic stage is analyzed, which provides a theoretical basis for plastic analysis. (3) Analysis and study of pipeline in pure bending state. The stress state of pipeline is calculated by theoretical calculation and finite element analysis according to whether the reinforcement of material is considered. The relationship between bending moment and curvature is found. (4) according to the actual engineering situation, the coaction of axial force and bending moment is applied to the process of pipeline winding. The stress and deformation state of pipeline under the action of tension and bending is analyzed by using the method of theoretical calculation and finite element analysis. It provides a reference for the application of axial force and bending moment in the process of construction and the selection of appropriate disc.
【学位授予单位】：中国海洋大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P756.2

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