Risk Assessment Method for Offshore Structure Based on Global Sensitivity Analysis
Based on global sensitivity analysis (GSA), this paper proposes a new risk assessment method for an offshore structure design. This method quantifies all the significances among random variables and their parameters at first. And by comparing the degree of importance, all minor factors would be negl...
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
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| Series: | Modelling and Simulation in Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/671934 |
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| _version_ | 1832550206061674496 |
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| author | Zou Tao Li Huajun Liu Defu |
| author_facet | Zou Tao Li Huajun Liu Defu |
| author_sort | Zou Tao |
| collection | DOAJ |
| description | Based on global sensitivity analysis (GSA), this paper proposes a new risk assessment method for an offshore structure design. This method quantifies all the significances among random variables and their parameters at first. And by comparing the degree of importance, all minor factors would be negligible. Then, the global uncertainty analysis work would be simplified. Global uncertainty analysis (GUA) is an effective way to study the complexity and randomness of natural events. Since field measured data and statistical results often have inevitable errors and uncertainties which lead to inaccurate prediction and analysis, the risk in the design stage of offshore structures caused by uncertainties in environmental loads, sea level, and marine corrosion must be taken into account. In this paper, the multivariate compound extreme value distribution model (MCEVD) is applied to predict the extreme sea state of wave, current, and wind. The maximum structural stress and deformation of a Jacket platform are analyzed and compared with different design standards. The calculation result sufficiently demonstrates the new risk assessment method’s rationality and security. |
| format | Article |
| id | doaj-art-3c55b5cf2fe24db3bc1af8c25e8529bd |
| institution | Kabale University |
| issn | 1687-5591 1687-5605 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Modelling and Simulation in Engineering |
| spelling | doaj-art-3c55b5cf2fe24db3bc1af8c25e8529bd2025-02-03T06:07:25ZengWileyModelling and Simulation in Engineering1687-55911687-56052012-01-01201210.1155/2012/671934671934Risk Assessment Method for Offshore Structure Based on Global Sensitivity AnalysisZou Tao0Li Huajun1Liu Defu2College of Engineering, Ocean University of China, Qingdao 266100, ChinaCollege of Engineering, Ocean University of China, Qingdao 266100, ChinaDisaster Prevention Research Institute, Ocean University of China, Qingdao 266003, ChinaBased on global sensitivity analysis (GSA), this paper proposes a new risk assessment method for an offshore structure design. This method quantifies all the significances among random variables and their parameters at first. And by comparing the degree of importance, all minor factors would be negligible. Then, the global uncertainty analysis work would be simplified. Global uncertainty analysis (GUA) is an effective way to study the complexity and randomness of natural events. Since field measured data and statistical results often have inevitable errors and uncertainties which lead to inaccurate prediction and analysis, the risk in the design stage of offshore structures caused by uncertainties in environmental loads, sea level, and marine corrosion must be taken into account. In this paper, the multivariate compound extreme value distribution model (MCEVD) is applied to predict the extreme sea state of wave, current, and wind. The maximum structural stress and deformation of a Jacket platform are analyzed and compared with different design standards. The calculation result sufficiently demonstrates the new risk assessment method’s rationality and security.http://dx.doi.org/10.1155/2012/671934 |
| spellingShingle | Zou Tao Li Huajun Liu Defu Risk Assessment Method for Offshore Structure Based on Global Sensitivity Analysis Modelling and Simulation in Engineering |
| title | Risk Assessment Method for Offshore Structure Based on Global Sensitivity Analysis |
| title_full | Risk Assessment Method for Offshore Structure Based on Global Sensitivity Analysis |
| title_fullStr | Risk Assessment Method for Offshore Structure Based on Global Sensitivity Analysis |
| title_full_unstemmed | Risk Assessment Method for Offshore Structure Based on Global Sensitivity Analysis |
| title_short | Risk Assessment Method for Offshore Structure Based on Global Sensitivity Analysis |
| title_sort | risk assessment method for offshore structure based on global sensitivity analysis |
| url | http://dx.doi.org/10.1155/2012/671934 |
| work_keys_str_mv | AT zoutao riskassessmentmethodforoffshorestructurebasedonglobalsensitivityanalysis AT lihuajun riskassessmentmethodforoffshorestructurebasedonglobalsensitivityanalysis AT liudefu riskassessmentmethodforoffshorestructurebasedonglobalsensitivityanalysis |