In addition to a small part of the marine engineering structure that has the structural form of a traditional ship, its main structural characteristics are: it is a steel pipe truss structure composed of various chords and diagonal rods. For example, the drilling equipment used for exploration, due to changes in the water depth of the operating sea area and the seahorse conditions, has successively appeared in various forms such as mobile jack-up drilling platforms, semi-submersible drilling platforms, and floating ship drilling platforms. The stress state and the serious consequences of damage once it is destroyed, the structural parts can generally be divided into three categories:
1) Key components (also called special components). It is the most important component for the structure as a whole. This type of component may have a high degree of stress concentration or layered tearing in the thickness direction. Such as jacket pipe joints, deck frame and jacket leg connection, deck frame and column connection, cross connection of important main beams, lifting rings, etc.
2) Important components (also known as main components). Components that are important to the structure as a whole, and other components that are important to work safety. Such as jackets and racks (Figure 166), leg columns, piles, main supports, main deck dyeing, main deck truss, riser support structure, helicopter deck pipe support and block support structure
3) General components (also known as secondary components). In addition to key components and other components other than important components.
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Post time: Jan-28-2021