Method for analyzing and measuring safety of petroleum pipeline suspended on seabed
An oil pipeline safety technology, which is applied in the field of safety analysis and calculation of oil pipeline suspension spans, can solve problems such as the inability to analyze the structure of multiple suspension spans of offshore oil pipelines, and the difficulty in meeting the safety design requirements of offshore pipeline suspension spans.
Inactive Publication Date: 2010-09-15
赵汝江
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Problems solved by technology
However, this answer is approximate and cannot analyze the multiple suspension span structures of offshore oil pipelines placed under rough seabeds
Therefore, traditional analysis methods are difficult to meet the increasingly stringent safety design requirements for offshore pipeline spans
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[0072] Figure 1-10 The three-dimensional mechanical model of a simulated oil pipeline shown is one of the embodiments of the present invention. The analysis and calculation method for the safety of the suspension span of the oil pipeline on the seabed in the embodiment of the present invention is analyzed and calculated on the finite element simulation platform. Each step is calculated by ANSYS software programming, and the specific steps are as follows:
[0073] 1. Raw data collection steps;
[0074] This raw data includes the following data
[0075] The input data units of the input files must be consistent because there is no built-in check in the analysis program.
[0076] a. Physical parameters of the offshore oil pipeline: including the physical parameters of the offshore oil pipeline, including the length of the offshore oil pipeline, the number of sea pipe elements, the number of sea pipe nodes, the number of seabed nodes, and the simulated seabed surface width;
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The invention provides a method for analyzing and measuring the safety of a petroleum pipeline suspended on seabed and carrying out analysis and measurement on a limited simulation platform, comprising the following steps of collecting original data, detecting the buoyancy of integrally internal and external pipelines, establishing a cyber three-dimensional initial mechanics model of a marine petroleum pipeline by using a state that the marine petroleum pipeline is vacantly and horizontally arranged on a virtual and totally horizontal seabed surface, calculating the initial deformation causedby residual paving tensile force of the internal pipe by a finite element method, applying the loads such as pressure, temperature force and the like step by step on the internal and external pipe, thus obtaining the final deformation of the marine petroleum pipeline, and outputting the obtained calculation results. The analysis and measurement method can correct design at severe suspending sections under the prearranged seabed line on which the safety may be affected for the marine petroleum pipeline, and can also provide basis for carrying out remedial treatment at the severe suspending section under the built seabed line on which the safety may be affected.
Description
technical field [0001] The present invention relates to a method for analyzing and measuring the safety of suspended spans of oil pipelines, in particular to a method for computer analysis and calculation of the safety of suspended spans of oil pipelines on the seabed, so as to make sure that the offshore oil pipelines are under predetermined or built seabed routes. Evaluate the safety of the suspended span to provide a basis for remedial treatment. Background technique [0002] Offshore oil pipeline engineering is one of the most difficult projects in offshore engineering technology. A complete offshore oil pipeline is laid along the predetermined seabed route. The phenomenon of suspension and cross-air has a huge impact on the safety of marine pipelines. The damage of general marine engineering projects such as drilling platforms, jackets, manifold structures, etc. is usually gradual, slow and visually detectable. Even if damaged, maintenance design and construction can b...
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IPC IPC(8): G06F17/50
Inventor 赵汝江
Owner 赵汝江