An annular panel rib structure with distributed stiffness

Abstract

The invention discloses an annular panel rib structure with distributed rigidity, which relates to the structural design field of a deep-sea transport platform. The structure comprises a first rib webplate and an annular panel rib which are fixedly connected. The circular ring rib panel has a circular cross-section, and the circular ring rib panel is provided with a water flowing hole. The annular rib panel is divided into a predetermined number of segments along the circumferential direction of the pressure-resistant housing, and each segment ring adopts the same outer diameter, butts with the first rib web plate in turn through the front and the tail, is assembled with the first rib web plate, and is welded to form a complete rib ring. The connection between the main structures is transformed from rigid to elastic by the circular panel rib structure, which has strong displacement compensation ability and can effectively solve the deformation coordination problem of the deep-sea multi-body structure.

Description

technical field [0001] The invention relates to the field of structural design of a deep-sea carrier platform, in particular to an annular panel rib structure with distributed stiffness. Background technique [0002] In order to overcome the huge seawater pressure in the deep sea, cylindrical shells are often used as the main pressure-resistant structure of large-scale deep-sea carrier platforms. To improve the stability of the pressure-resistant shell plates, T-shaped ribs composed of webs and panels are usually used for reinforcement. According to different operating depths and carrying capacity requirements, a single pressure body or a multi-pressure body combination structure can be used. In order to form a good hydrodynamic shape, a non-pressure body needs to be coated on the outside of the pressure body . Multiple pressure-resistant shells and between internal pressure-resistant shells and external non-pressure-resistant shells are generally connected by setting faste...

AI Technical Summary

Problems solved by technology

[0003] In the deep sea environment, the longitudinal and transverse compression deformation of the pressure structure will be very large. Since the main structure of each part is rigidly connected, the deformation of each pressure shell will be affected by other pressure shell structures. greater impact, and these structures have different supporting effects on the circumferential directions of the pressure shell, which will cause uneven radial deformation of the pressure shell along the circumferential direction. The position where the deformation is small and the support stiffness is small, the radial deformation is large, thus forming the deformation coordination problem of the multi-pressure body composite structure

The deformation coordination problem between the shells will cause uneven structural stress distribution, which will easily cause local stress concentration, thereby reducing the ultimate bearing capacity of the pressure shell and affecting the safety of the platform structure. At the same time, the structural deformation caused by the deformation coordination problem Uneven distribution will also affect the installation and operation of platform system equipment and reduce the performance of the platform

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