Comparison of Extreme Surface Elevation for Linear and Nonlinear Random Wave Theory for Offshore Structures
For offshore structural design, the load due to wind-generated random waves is usually the most important source of loading. While these structures can be designed by exposing them to extreme regular waves (100-year design wave), it is much more satisfactory to use a probabilistic approach to accoun...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2018-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://doi.org/10.1051/matecconf/201820301021 |
| _version_ | 1818735685197103104 |
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| author | Mukhlas Nurul 'Azizah Zaki Noor Irza Mohd Husain Mohd Khairi Abu Najafian Gholamhossein |
| author_facet | Mukhlas Nurul 'Azizah Zaki Noor Irza Mohd Husain Mohd Khairi Abu Najafian Gholamhossein |
| author_sort | Mukhlas Nurul 'Azizah |
| collection | DOAJ |
| description | For offshore structural design, the load due to wind-generated random waves is usually the most important source of loading. While these structures can be designed by exposing them to extreme regular waves (100-year design wave), it is much more satisfactory to use a probabilistic approach to account for the inherent randomness of the wave loading. This method allows the statistical properties of the loads and structural responses to be determined, which is essential for the risk-based assessment of these structures. It has been recognized that the simplest wave generation is by using linear random wave theory. However, there is some limitation on its application as some of the nonlinearities cannot be explained when higher order terms are excluded and lead to underestimating of 100-year wave height. In this paper, the contribution of nonlinearities based on the second order wave theory was considered and being tested at a variety of sea state condition from low, moderate to high. Hence, it was proven that the contribution of nonlinearities gives significant impact the prediction of 100-year wave's design as it provides a higher prediction compared to linear wave theory. |
| first_indexed | 2024-12-18T00:25:11Z |
| format | Article |
| id | doaj.art-e080f96baede4ac09d42ead5fb9ae630 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-18T00:25:11Z |
| publishDate | 2018-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-e080f96baede4ac09d42ead5fb9ae6302022-12-21T21:27:16ZengEDP SciencesMATEC Web of Conferences2261-236X2018-01-012030102110.1051/matecconf/201820301021matecconf_iccoee2018_01021Comparison of Extreme Surface Elevation for Linear and Nonlinear Random Wave Theory for Offshore StructuresMukhlas Nurul 'AzizahZaki Noor Irza MohdHusain Mohd Khairi AbuNajafian GholamhosseinFor offshore structural design, the load due to wind-generated random waves is usually the most important source of loading. While these structures can be designed by exposing them to extreme regular waves (100-year design wave), it is much more satisfactory to use a probabilistic approach to account for the inherent randomness of the wave loading. This method allows the statistical properties of the loads and structural responses to be determined, which is essential for the risk-based assessment of these structures. It has been recognized that the simplest wave generation is by using linear random wave theory. However, there is some limitation on its application as some of the nonlinearities cannot be explained when higher order terms are excluded and lead to underestimating of 100-year wave height. In this paper, the contribution of nonlinearities based on the second order wave theory was considered and being tested at a variety of sea state condition from low, moderate to high. Hence, it was proven that the contribution of nonlinearities gives significant impact the prediction of 100-year wave's design as it provides a higher prediction compared to linear wave theory.https://doi.org/10.1051/matecconf/201820301021 |
| spellingShingle | Mukhlas Nurul 'Azizah Zaki Noor Irza Mohd Husain Mohd Khairi Abu Najafian Gholamhossein Comparison of Extreme Surface Elevation for Linear and Nonlinear Random Wave Theory for Offshore Structures MATEC Web of Conferences |
| title | Comparison of Extreme Surface Elevation for Linear and Nonlinear Random Wave Theory for Offshore Structures |
| title_full | Comparison of Extreme Surface Elevation for Linear and Nonlinear Random Wave Theory for Offshore Structures |
| title_fullStr | Comparison of Extreme Surface Elevation for Linear and Nonlinear Random Wave Theory for Offshore Structures |
| title_full_unstemmed | Comparison of Extreme Surface Elevation for Linear and Nonlinear Random Wave Theory for Offshore Structures |
| title_short | Comparison of Extreme Surface Elevation for Linear and Nonlinear Random Wave Theory for Offshore Structures |
| title_sort | comparison of extreme surface elevation for linear and nonlinear random wave theory for offshore structures |
| url | https://doi.org/10.1051/matecconf/201820301021 |
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