关键词: 浮式生产储卸油装置, T形梁, 稳定性, 有限元法

Abstract: T-girder, which is the main load-bearing component of the hull structure of the Floating, Production, Storage and Offloading (FPSO) unit, is the crucial structure in the strength and stability check of the FPSO hull. However, the common rules have no defined stability check schemes for the T-girder in the FPSO hull. The relevant contents are distributed in other regulations, requiring engineers to choose based on their own engineering experience, which is not beneficial for the standardization of the structural design. Furthermore, the regulations in the rules about calculating the Euler stress effective length of the T-girder cannot be directly applied due to the stiffness constraints of the transition brackets and support structures at both ends and back of the T-girder. To solve the above problems, a stability-checking scheme of the T-girder for the FPSO hull is proposed by summarizing the rules of various classification societies. The Euler stress effective length of the T-girder can then be accurately determined by using the finite element model and the built-in monitoring girder method.

Key words: floating production storage and offloading unit (FPSO), T-girder, stability, finite element method (FEM)