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Marine riser lateral vibration PD control simulation method

A technology of lateral vibration and control simulation, applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve the effect of low data error rate

Inactive Publication Date: 2015-04-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Domestic research on the vibration of offshore oil pipelines is still relatively small, mainly focusing on theoretical analysis such as oil pipeline stability analysis and vortex-induced vibration analysis. There is no in-depth research on problem modeling and safety control design for pipeline vibration.

Method used

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  • Marine riser lateral vibration PD control simulation method
  • Marine riser lateral vibration PD control simulation method
  • Marine riser lateral vibration PD control simulation method

Examples

Experimental program
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Embodiment

[0031] Such as figure 1 As shown, a PD control simulation method for lateral vibration of a marine riser includes the following steps:

[0032] S1 uses the differential discretization method to discretize the PDEs equation, which is divided into the discrete operation of the current disturbance f(x,t) and the discrete operation of the standpipe mathematical equation, which specifically includes the following steps:

[0033] S1.1 For the derivable function f(x), divide any interval [a,b](a,b∈R) on the x-axis into N equal parts with step size h=Δx=(b-a) / N , the N∈Z, N>0, the i-th grid point x on the interval [a,b] i (i=1,2,3,...,N) to construct the Taylor expansion of the backward difference is written as:

[0034] f ( x i - h ) ...

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Abstract

The invention discloses a marine riser lateral vibration PD control simulation method which includes conducting discretization on a partial differential equation, then building the Matlab GUI interface on a personal computer to simulate vibration of the riser and collect vibration data of the riser, utilizing a serial port transmission control module to design the PC control algorithm according to the data and converting the algorithm into electric signals which are then transmitted to the PC. By means of the method, the interface can receive control signals transmitted by the control module timely and respond to the control signals quickly.

Description

technical field [0001] The invention belongs to the field of safe production of marine oil delivery risers, and in particular relates to a PD control simulation method for lateral vibration of marine risers. Background technique [0002] Ocean oil pipeline is the main form of offshore oil and gas gathering and transportation, which has the advantages of continuous, fast, large transportation volume, and little impact on climate. It connects the upstream and downstream of offshore oil and gas field development, and is the lifeline project in the entire offshore oil and gas field development. At present, offshore oil and gas development (especially the exploration and development of deep water and ultra-deep water oil and gas resources) has become the key field of oil and gas extraction in the world. The safe production of offshore oil and gas resources is of great significance for my country to build sustainable energy and resource areas and maintain national economic securi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 刘屿赵志甲许冰霜
Owner SOUTH CHINA UNIV OF TECH
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