Instability analysis of deepwater riser with fairings
The paper investigates the mechanism of instability of deepwater risers fitted with fairings and presents an analytical model to predict the instability onset conditions. The simplified case of a two-dimensional (2D) problem was considered. The governing equations were derived, and the hydrodynamic...
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| Veröffentlicht in: | Ocean engineering 2014-03, Vol.79, p.26-34 |
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| creator | Khorasanchi, Mahdi Huang, Shan |
| description | The paper investigates the mechanism of instability of deepwater risers fitted with fairings and presents an analytical model to predict the instability onset conditions. The simplified case of a two-dimensional (2D) problem was considered. The governing equations were derived, and the hydrodynamic forces were calculated and the effect of motion in these forces was taken into consideration. The final equations were linearised and an eigenvalue analysis was employed to systematically examine the stability with the emphasis on identifying the critical current speed for a given system. This model was validated against the available test results and showed a good agreement. A parametric study was also carried out. It showed the significant role of the hydrodynamic coefficients as well as mass distribution in the stability of the system.
•The 2D problem of a fairing on a rigid riser is considered.•An analytical model was developed to predict the instability onset conditions.•A parametric study showed the significant role of the hydrodynamic coefficients.•The effect of mass distribution on the stability of the system was identified. |
| doi_str_mv | 10.1016/j.oceaneng.2014.01.003 |
| format | Article |
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Public works</subject><subject>Computational fluid dynamics</subject><subject>Exact sciences and technology</subject><subject>Fairing</subject><subject>Fairings</subject><subject>Hydraulic constructions</subject><subject>Instability</subject><subject>Mathematical analysis</subject><subject>Mathematical models</subject><subject>Offshore structure (platforms, tanks, etc.)</subject><subject>Riser</subject><subject>Risers</subject><subject>Stability</subject><subject>Two dimensional</subject><subject>VIV</subject><issn>0029-8018</issn><issn>1873-5258</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqNkE1LAzEQhoMoWKt_QfYieNl1kmzS5KYUv6DgRc8hzU5qyna3JltL_70pVa96mbk87wzvQ8glhYoClTfLqndoO-wWFQNaV0ArAH5ERlRNeCmYUMdkBMB0qYCqU3KW0hIApAQ-IuK5S4OdhzYMu8J2tt2lkIreFw3iemsHjEUMKc9tGN4Lb0MM3SKdkxNv24QX33tM3h7uX6dP5ezl8Xl6NytdLeRQWqEaN9daNYw1IISwmjLKGi-09VIjq3OBCXohFThvlVDSo-CNBitzCvmYXB_urmP_scE0mFVIDts21-03yVBZMyYpY_wfKJvoiahz6zGRB9TFPqWI3qxjWNm4MxTMXqlZmh-lZq_UADVZaQ5eff-wydnWR9u5kH7TTHHJuaaZuz1wmN18BowmuYCdwyZEdINp-vDXqy8-f450</recordid><startdate>20140315</startdate><enddate>20140315</enddate><creator>Khorasanchi, Mahdi</creator><creator>Huang, Shan</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20140315</creationdate><title>Instability analysis of deepwater riser with fairings</title><author>Khorasanchi, Mahdi ; Huang, Shan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c456t-a58dcb998d22d0555a91212df59af69e241017ef5680cfa8586fe53d90a6998e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Applied sciences</topic><topic>Buildings. Public works</topic><topic>Computational fluid dynamics</topic><topic>Exact sciences and technology</topic><topic>Fairing</topic><topic>Fairings</topic><topic>Hydraulic constructions</topic><topic>Instability</topic><topic>Mathematical analysis</topic><topic>Mathematical models</topic><topic>Offshore structure (platforms, tanks, etc.)</topic><topic>Riser</topic><topic>Risers</topic><topic>Stability</topic><topic>Two dimensional</topic><topic>VIV</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Khorasanchi, Mahdi</creatorcontrib><creatorcontrib>Huang, Shan</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Ocean engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Khorasanchi, Mahdi</au><au>Huang, Shan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Instability analysis of deepwater riser with fairings</atitle><jtitle>Ocean engineering</jtitle><date>2014-03-15</date><risdate>2014</risdate><volume>79</volume><spage>26</spage><epage>34</epage><pages>26-34</pages><issn>0029-8018</issn><eissn>1873-5258</eissn><coden>OCENBQ</coden><abstract>The paper investigates the mechanism of instability of deepwater risers fitted with fairings and presents an analytical model to predict the instability onset conditions. 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•The 2D problem of a fairing on a rigid riser is considered.•An analytical model was developed to predict the instability onset conditions.•A parametric study showed the significant role of the hydrodynamic coefficients.•The effect of mass distribution on the stability of the system was identified.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.oceaneng.2014.01.003</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Ocean engineering, 2014-03, Vol.79, p.26-34 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Applied sciences Buildings. Public works Computational fluid dynamics Exact sciences and technology Fairing Fairings Hydraulic constructions Instability Mathematical analysis Mathematical models Offshore structure (platforms, tanks, etc.) Riser Risers Stability Two dimensional VIV |
| title | Instability analysis of deepwater riser with fairings |
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