Computer method for predicting landslide vertical impact acting force on submarine pipeline

Abstract

The invention discloses a computer method for simulating landslide vertical impact force borne by a submarine pipeline. According to the technical scheme, the method is characterized by comprising thesteps that 1, a three-dimensional model of the landslide vertical impact force borne by the subsea pipeline is established; 2, mesh generation is performed on the three-dimensional model, a non-repeated control volume exists around each mesh point, and a result is solved by utilizing a calculation equation; 3, model parameters are determined according to seabed sediment sampling and testing of the seabed landslide pre-judgment area; and 4, the obtained parameters are input into the model established in the step 2. The method provides technical reference for prediction and disaster preventiondesign of landslide disaster acting force on the submarine pipeline.

Description

technical field [0001] The invention relates to a computer method for predicting the vertical impact force of a landslide on a submarine pipeline. Background technique [0002] In recent years, with the rapid development of marine engineering, the number of submarine pipeline facilities directly related to marine energy development, such as submarine pipelines and cables, has been continuously increased. Whether these pipelines are stable during the service period directly affects offshore oil and gas exploitation and the lives of operators. Safety of property and marine ecological environment. But at the same time, submarine pipelines are also facing an increasingly complex and changeable geological environment of marine hazards. Among them, submarine landslides are a kind of marine soil disasters that occur frequently, affect a wide area, and are extremely threatening. Under the complex effect of the water environment, it gradually evolved into a submarine flow slide, whi...

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Problems solved by technology

[0003] At present, in the research on the impact of submarine landslides on pipelines, the evaluation method for the normal impact force generated by submarine landslides (the direction of the normal force is consistent with the direction of landslide movement) has been relatively complete, but for the vertical impact of submarine landslides The research on the vertical force (the direction of the vertical force is perpendicular to the direction of the landslide movement) is very limited, and the vertical force of the submarine landslide may cause vertical deformation or periodic vibration of the pipeline, which has a great impact on the disaster of the pipeline and is of great engineering research value ; In addition, the influence of the real situation of the distance between the submarine pipeline and the seabed on the impact force is often not considered

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