Pipe-soil dynamic coupling effect analysis method

Abstract

The invention discloses a pipe-soil dynamic coupling effect analysis method. The method comprises steps as follows: establishment of a pipe-soil dynamic coupling effect analysis model, determination of a nonlinear hysteretic loop of soil mass according to the maximum depth of a pipeline structure embedded into the soil mass, and the like. The pipe-soil dynamic coupling effect analysis method has the advantages as follows: the influence of various factors such as undrained shear strength of seafloor mud surface soil mass, vertical increment of undrained shear strength of the soil mass, the pipe trench shape, surface roughness of the pipeline structure, the nonlinear hysteresis effect of the soil mass and the like are taken into consideration, support stiffness of seabed soil mass on the pipeline structure and the damping coefficient of the soil mass are determined according to the position and the direction of motion of the pipeline structure, the maximum depth of the pipeline structure embedded into the soil mass is updated in real time according to the motion condition of the pipeline structure, so that one novel pipe-soil dynamic coupling effect analysis method is established, the problem about the dynamic coupling effect of the pipeline structure and the seabed soil mass is solved, and an effective analysis method and reliable theoretical basis are provided for the dynamic coupling effect between the seabed soil mass and the pipeline structures such as a seabed pipeline, a catenary stand pipe and the like.

Description

technical field [0001] The invention relates to a research method for pipe-soil coupling effect, more specifically, the invention relates to an analysis method for researching the dynamic coupling effect of pipe structure and seabed soil. technical background [0002] In recent years, as people gradually increase the exploitation and utilization of marine resources, pipeline structures such as submarine pipelines and catenary risers have been more and more widely used in marine engineering. [0003] The submarine pipeline can efficiently and quickly transport oil, natural gas and other energy substances produced by the submarine oil well to the land, and has the advantages of convenient installation, low cost, and efficient transportation. It is the main device for the transportation of submarine oil and gas resources, and it is also The main arteries of the system. However, due to the undulating seabed topography and the scouring of the seabed currents, it is easy to cause...

AI Technical Summary

Problems solved by technology

[0010] The existing technology has made a lot of simplifications for the dynamic coupling effect of the pipe and soil. In the analysis and research of it, linear springs or nonlinear springs are generally used to simulate the effect of the seabed soil on the pipe structure, but the effect of the seabed soil on the pipe structure is not considered. Properties, properties of the pipeline structure and properties of the interaction between the pipeline structure and the subsea soil, such as: shear strength of the subsea soil, soil adsorption effects, surface roughness of the pipeline structure, pipeline groove shape and soil nonlinear hysteresis and many more

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