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A Method for Estimating the Remaining Life of Offshore Platforms in Cold Regions

An offshore platform and life assessment technology, applied in special data processing applications, measuring devices, instruments, etc., to achieve accurate and reliable analysis results

Inactive Publication Date: 2011-12-21
OCEAN UNIV OF CHINA
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Problems solved by technology

[0014] The purpose of the present invention is to provide a more reasonable and scientific method for assessing the remaining life of offshore platforms in cold regions, aiming at the defects of existing methods for analyzing the remaining life of offshore platforms

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  • A Method for Estimating the Remaining Life of Offshore Platforms in Cold Regions
  • A Method for Estimating the Remaining Life of Offshore Platforms in Cold Regions
  • A Method for Estimating the Remaining Life of Offshore Platforms in Cold Regions

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with specific embodiments.

[0027] The fatigue damage of offshore platforms is a gradual accumulation process. The main part of the fatigue life is the process of gestation and initiation of cracks, while the duration of crack propagation to fracture is short, which only accounts for a small part of the fatigue life. A crack has arisen which must be repaired immediately. However, the existing remaining life evaluation method does not consider the fatigue damage within the service life, but only calculates the fatigue life based on the state of the offshore platform (such as the corrosion status) at the time of the remaining life evaluation, which is exactly the same as the fatigue life calculation method of the new structure. The only difference is that the state of the structure is not the design state, but the state at the time of evaluation. If the offshore platform is not subject to severe corr...

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Abstract

The invention belongs to the design technology of an ocean platform, and in particular relates to a method for evaluating the remaining life of an ocean platform in a cold region. When calculating the remaining life of the offshore platform, this method takes into account the cumulative fatigue damage within the service life, the influence of fatigue damage caused by short-term environmental loads on the remaining fatigue life, and the impact of fatigue damage caused by extreme environmental loads on the remaining fatigue life. Influence of remaining fatigue life. The present invention is more in line with the actual fatigue damage accumulation essence of the offshore platform, more in line with the known Miner's linear damage accumulation criterion, more in line with the current environmental load change trend and characteristics, more scientific and reasonable than the existing method, and the analysis result of the remaining life is more accurate Accurate and reliable.

Description

technical field [0001] The invention belongs to the design technology of an ocean platform, and in particular relates to a method for evaluating the remaining life of an ocean platform in a cold region. Background technique [0002] The remaining life analysis of the offshore platform is one of the important contents of the safety assessment of the offshore platform, which provides the basis for decision-making for the use and management of the offshore platform. Therefore, the remaining life analysis is an important and cumbersome task during the service period of offshore platforms, especially for offshore platforms in the middle and late stages of service and for offshore platforms that are preparing to be overdue, remaining life analysis is more important and more frequent. [0003] The existing remaining life analysis method of offshore platform is to calculate the fatigue damage of the structure by evaluating the state of the offshore platform structure (corrosion stat...

Claims

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Application Information

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IPC IPC(8): G06F19/00G01M99/00
Inventor 黄维平刘超魏东泽丁曼顾恩凯孟庆飞
Owner OCEAN UNIV OF CHINA
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