Large-caliber submarine pipeline local buckling design method based on point load effect
A submarine pipeline and design method technology, applied in computer-aided design, design optimization/simulation, calculation, etc., can solve the problem of conservative calculation results, inconformity with the structure of large-diameter pipelines, and failure to consider the protective effect of concrete counterweight layers on pipelines, etc. problem, to achieve the effect of good promotion value
Active Publication Date: 2021-12-14
OFFSHORE OIL ENG CO LTD
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Problems solved by technology
[0003] The existing design method is to complete the local buckling design of the pipeline by correcting the plastic bending moment generated by the pipeline under the action of point load, but this design method does not consider the protection effect of the concrete weight layer on the pipeline, and the large-diameter submarine pipeline Affected by the stability of the bottom, it is usually necessary to apply a certain thickness of concrete configuration layer, so the local buckling check of the pipeline based on the point load using the traditional design method does not conform to the real large-diameter pipeline structure, and the calculation results are biased. Conservative
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[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0033] Examples such as Figure 1 to Figure 3 As shown, the present invention discloses a local buckling design method for large-diameter submarine pipelines based on point loads, and the specific implementation of each step is as follows:
[0034] Take the laying and installation of 44-inch submarine pipeline as an example below to make a more specific description of the technical solution of the present invention:
[0035] S1: The design midpoint load form is the roller support of the pipe-laying ship in the submarine pipeline laying operation, and the outer surface of the roller is made of rubber material;
[0036] S2: The submarine pipeline is coated with a 3LPE anti-corrosio...
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The invention discloses a novel large-diameter submarine pipeline local buckling design method based on a point load effect. By considering structural characteristics of a large-diameter submarine pipeline and an action mode of a point load, a novel pipeline local buckling design method is provided, and design results are more in line with actual situations of a project. Thus, DNV standards are supplemented from the design method, and the method has good popularization value for the local buckling design of large-diameter submarine pipelines.
Description
technical field [0001] The invention relates to the technical field of marine engineering design, in particular to a local buckling design method for large-diameter submarine pipelines based on point loads. Background technique [0002] Large-diameter submarine pipelines are relatively weak against external pressure, especially during the installation period, because the pipeline is in an empty state and is more sensitive to external pressure. Therefore, for the local buckling check of large-diameter submarine pipelines, special attention should be paid to the working conditions in the installation stage. During the installation of submarine pipelines, under the action of external loads, due to insufficient structural rigidity, the cross-section of the pipeline will be deformed, resulting in local buckling. For large-diameter pipelines, due to the large diameter-thickness ratio, the thin-wall effect of the pipeline is more obvious, especially when the external load acting o...
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IPC IPC(8): G06F30/23G06F111/10G06F113/14
CPCG06F30/23G06F2111/10G06F2113/14Y02T90/00
Inventor 黄钰孙国民李庆杨琥余志兵王乐芹李秀锋李旭王辉崔少敏刘极莉
Owner OFFSHORE OIL ENG CO LTD