Umbilical cable filling structure optimization method

Abstract

The invention discloses an umbilical cable filling structure optimization method. The method comprises: establishing a geometric model of an umbilical cable according to a filling shape of the umbilical cable, setting a pressure threshold value borne by each filling edge, simulating a stress characteristic of a filling component, and meanwhile, carrying out fixed constraint on each end point to limit translation and rotation in a model plane; carrying out topological optimization on the filling structure by adopting a variable density method; taking the density of each unit as a topological design variable, taking static flexibility minimization as a target function and a constraint function, selecting a volume fraction upper limit, setting an upper limit initial value, then carrying out optimization iterative calculation, adjusting the volume fraction upper limit according to a calculation result, and recalculating according to an adjusted numerical value to obtain an optimized structure; and carrying out curve fitting on the optimized structure, specifically, removing sharp corners and interrupted parts with small loads on the outer boundary according to the stress characteristics of the component, and fitting sawtooth-shaped boundaries in the structure to be smooth.

Description

technical field [0001] The invention relates to the technical field of umbilical cables, in particular to a method for optimizing the filling structure of an umbilical cable. Background technique [0002] The application of umbilical cables in marine engineering has a development history of nearly 50 years, and has successfully expanded from shallow water to deep water and ultra-deep water. The umbilical cable is connected between the upper floating body facility and the underwater production system, and is one of the key equipments for deep sea oil and gas exploitation. It is mainly composed of steel pipes, optical cables, cables, filling structures and armored steel wires, providing electricity, hydraulic power and control signals for the underwater production system, so the umbilical cable is also called the "nerve line" of the underwater production system. [0003] There is a large gap between the functional components of the umbilical cable section. During the installa...

AI Technical Summary

Problems solved by technology

At present, the design of the filling structure is often based on engineering experience or direct dense filling, which cannot meet the requirements of light weight reduction and mechanical performance of the umbilical cable. Therefore, how to reasonably design the material layout of the filling structure without reducing the mechanical properties Achieving weight reduction is an important issue in the design of umbilical filling structures

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