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Groove analysis method for forming steel catenary standpipe ground contact point area

A technology of steel catenary and analysis method, which is applied in the field of analysis, can solve problems such as the growth of simulated trench calculations, and achieve the effects of improving the calculation time, improving the overall design process, and improving accuracy

Active Publication Date: 2018-11-27
TIANJIN UNIV
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Problems solved by technology

[0005] The calculation time for groove simulation using conventional methods is too long, so it is necessary to study the influence of different parameters on the shape of grooves, and propose the recommended values ​​of parameters to accelerate the formation of grooves, so as to determine the method for rapid formation of grooves

Method used

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  • Groove analysis method for forming steel catenary standpipe ground contact point area
  • Groove analysis method for forming steel catenary standpipe ground contact point area
  • Groove analysis method for forming steel catenary standpipe ground contact point area

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specific Embodiment

[0067] 1. Because the calculation time of using the conventional method to simulate the trench is too long, the influence of different parameters on the shape of the trench is studied, and the suggested value of the nonlinear soil parameter that accelerates the formation of the trench is proposed.

[0068] 1) Use Orcaflex to establish the model of the steel catenary riser, floating body and seabed system, that is, the riser-trough model.

[0069] 2) The nonlinear soil parameters are studied by means of control variables. Compared with the basic working conditions, each calculation condition only changes one effective parameter of the nonlinear soil parameters. By comparing the calculation results, the impact of the nonlinear soil parameters on the trench The effect of shape.

[0070] 3) Under a variety of calculation conditions with different values ​​of nonlinear soil parameters, the dynamic response analysis of the riser-groove model is carried out, the value of the groove e...

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Abstract

The invention discloses a groove analysis method for forming a steel catenary standpipe ground contact point area. The method comprises the steps of determining a recommended value of a nonlinear soilparameter for accelerating the formation of a groove; according to the recommended value of the nonlinear soil parameter for accelerating the formation of the groove, calculating the shape of the groove under different working conditions, conducting a regression analysis on a groove shape formula, and determining the groove shape formula. The method can achieve the groove analysis for forming thesteel catenary standpipe ground contact point area; through the numerical simulation of the groove formation under the action of pipe soil, a method for rapidly forming the groove containing the recommended value of a specific coefficient is proposed; the groove shape regression formula based on finite element calculation is provided, thereby performing fatigue analysis of the groove to the standpipe ground contact area.

Description

technical field [0001] The invention relates to an analysis method, more specifically, to a method for analyzing grooves formed in the contact point area of ​​a steel catenary riser. Background technique [0002] The steel pipes suspended between the platform and the subsea facilities constitute the steel catenary riser. The shape of the riser is a catenary, and the flexible joint is used to hang freely outside the platform to link with the platform, eliminating the need for traditional hydraulic and pneumatic tensioning And bridging two devices, so that the platform space is more sufficient. The advantage of the steel catenary riser is that the cost is low, the tolerance of drift and heave motion is larger for the floating platform, no top tension compensation is needed at all, and it is more suitable for working in high-pressure and high-temperature medium environments. Compared with Next, steel catenary risers have obvious advantages over flexible risers and top tension ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F2119/06G06F30/20
Inventor 李英李婧一吴子昂
Owner TIANJIN UNIV
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