Deep sea pipeline S-shaped laying power simulation method

A dynamic simulation and pipeline technology, applied in design optimization/simulation, computer-aided design, CAD numerical modeling, etc., can solve the problems of difficult pipeline dynamic response, inability to accurately calculate the dynamic load of marine environment, etc.

Active Publication Date: 2021-03-12
FUZHOU UNIV
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Problems solved by technology

[0003] Deep-sea S-shaped pipelines involve nonlinearities such as large deflection geometric deformation, material properties, boundary contact, and hydrodynamic loads, which bring great challenges to laying dynamic simulation calculations
At present, the catenary method and perturbation method are often used to simplify the dynamic simulation to quasi-static analy

Method used

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  • Deep sea pipeline S-shaped laying power simulation method
  • Deep sea pipeline S-shaped laying power simulation method
  • Deep sea pipeline S-shaped laying power simulation method

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Embodiment Construction

[0065] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0066] Please refer to image 3 , the present invention provides a deep-sea pipeline S-type laying dynamic simulation method, comprising the following steps:

[0067] Step S1: establish S-type laying pipeline particle motion control equation based on vector finite element;

[0068] Such as figure 1 As shown, in this embodiment, in the overall domain coordinate system (x, y, z), the initial position of the pipeline is horizontal, the top end is fixed on the tensioner of the pipelaying vessel, and the bottom end is free. Based on the vector finite element method, the pipeline is discretized into N+1 mass points connected by N bending beam units. The end mass points, the movement and force of the pipeline structure are reflected by the mass points. The pipeline falls freely to the seabed under the action of gravity and buoyancy, and the bottom end is a...

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Abstract

The invention relates to a deep sea pipeline S-shaped laying dynamic simulation method which comprises the following steps: S1, establishing an S-shaped laying pipeline mass point motion control equation based on a vector finite element; S2, according to the obtained S-shaped laid pipeline mass point motion control equation, adopting a display center difference method for solving to obtain pipeline mass point displacement and a rotation angle; S3, according to the deflection theory of material mechanics, the internal force of the laid pipeline is calculated; s4, calculating the external forceof the laid pipeline; and S5, updating the particle position and the rotation angle, circulating the step S2 and the step S4 until the total calculation duration is reached, and outputting a dynamic simulation calculation result. The dynamic contact effect of the pipeline, the stinger and seabed soil is considered at the same time, the load and boundary conditions can be changed at any time in theanalysis process, the stress characteristics of the pipeline under the action of the dynamic marine environment are better simulated, and analysis is more accurate and reliable.

Description

technical field [0001] The invention relates to the field of laying and installation of deep-sea oil and gas pipelines, in particular to a dynamic simulation method for S-shaped laying of deep-sea pipelines. Background technique [0002] Deep-sea pipelines transport the oil and natural gas produced by subsea oil wells to land, and are an important means of collection and transportation for offshore oil and gas development. The S-type pipe-laying method pulls the oil and gas pipeline through the tensioner on the pipe-laying ship, and gradually lowers it to the seabed through the stinger. It has the advantages of large pipe diameter and fast speed, and is the most commonly used method for laying offshore oil and gas pipelines. As the development of offshore oil and gas moves towards the deep sea, the complex marine environment in the deep sea makes pipeline laying difficult and risky, and puts forward higher requirements for the simulation calculation method of S-shaped pipeli...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F111/10G06F113/14G06F119/12G06F119/14
CPCG06F30/23G06F2119/14G06F2111/10G06F2113/14G06F2119/12
Inventor 徐普杜志新张挺苏燕
Owner FUZHOU UNIV
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