A method for predicting the impact force of subsea landslides on subsea pipelines
A technology of submarine pipeline and prediction method, applied in the field of marine engineering, can solve the problems of pipeline damage, there is no reliable theoretical basis, and the prediction method of the impact force of submarine pipeline has not yet been seen, so as to achieve the effect of ensuring safe operation and improving safety design.
Active Publication Date: 2022-06-21
FUJIAN UNIV OF TECH
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Problems solved by technology
Due to the high strength of the collapse block, it will cause impact force on the submarine pipeline during the slide process. If the impact force is too large, it will easily cause pipeline damage
So far, there is no reliable theoretical basis for predicting the impact force of collapse blocks on submarine pipelines.
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[0048] The present invention will be further described below in conjunction with the embodiments.
[0049] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0050] It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and / or combinations thereof....
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Abstract
The invention relates to a method for predicting the impact force of a submarine landslide block on a submarine pipeline. When the soft soil below the hard layer is subjected to wave cyclic load, its cohesion and internal friction angle gradually decrease to a critical value , a landslide occurs on the seabed. At this time, the hard layer slides down, tears into collapsed blocks, and slides down the slope. First, the bottom collapsed block hits the submarine pipeline. The instantaneous impact force of the collapsed block hitting the submarine pipeline is determined according to the momentum theorem. After the impact force is over, the collapse block acts on the submarine pipeline in the form of static thrust, and then the second row of collapse blocks impacts the first row of collapse blocks, and this impact force acts on the submarine pipeline. After the impact force ends, the first The first row and the second row of collapse blocks act on the submarine pipeline in the form of static thrust, so until the last row of collapse blocks rushes to the submarine pipeline, acting on the submarine pipeline with two forms of instantaneous impact force and static thrust.
Description
technical field [0001] The invention relates to the field of marine engineering, in particular to a method for predicting the impact force of a submarine landslide collapse block on a submarine pipeline. Background technique [0002] The seabed in the Bohai Bay area of my country has a hard layer with a small thickness, and there is a weak substratum with low strength below the hard layer. Under extreme sea conditions, waves may easily lead to liquefaction of the soft substratum. The upper hard layer is not easy to liquefy due to its high density and high strength, and the hard layer slides down along the lower liquefied layer, tearing and becoming a collapse. Due to the high strength of the collapsed block, it will cause an impact force on the submarine pipeline during the sliding process. If the impact force is too large, it is easy to cause damage to the pipeline. So far, there is no method for predicting the impact force of collapse blocks on submarine pipelines, and ...
Claims
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IPC IPC(8): G06Q10/04G06F30/20G01L5/00G06F119/14
CPCG06Q10/04G06F30/20G01L5/0052G06F2119/14
Inventor 罗才松王枫轩付朝江高颖詹金武陈华艳乔惠云王启云
Owner FUJIAN UNIV OF TECH