{"id":54,"date":"2023-09-05T12:23:18","date_gmt":"2023-09-05T12:23:18","guid":{"rendered":"http:\/\/dev.triton.co.za\/?page_id=54"},"modified":"2025-04-14T10:15:13","modified_gmt":"2025-04-14T08:15:13","slug":"mooring-analysis","status":"publish","type":"page","link":"https:\/\/www.triton.co.za\/index.php\/mooring-analysis\/","title":{"rendered":"Mooring Analysis"},"content":{"rendered":"\n
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Return<\/a><\/div>\n<\/div>\n\n\n\n

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Dynamic Mooring Analysis<\/strong><\/p>\n\n\n\n

Non-linear dynamic (time domain) mooring analysis were performed on a number of Oil Rigs and FPSO’s as listed below.<\/p>\n\n\n\n

1.1 F.P.S.O. Glas Dowr (2003) \u2013 Alongside Dynamic Mooring
1.2 Semi Sub – South Seas Driller (Pride South Seas) \u2013 Alongside Dynamic Mooring
1.3 Semi Sub – Gavea Lifter \/ Sedco 709 \u2013 Alongside Dynamic Mooring
1.4 F.P.S.O Dalia \u2013 Alongside Dynamic Mooring
1.5 Semi Sub \u2013 Orca \u2013 Alongside Dynamic Mooring
1.6 Semi Sub – Atlantic Venture \u2013 Alongside Dynamic Mooring
1.7 Semi Sub – Transocean Richardson \u2013 Alongside Dynamic Mooring
1.8 Semi Sub \u2013 Scarabeo \u2013 Alongside Dynamic Mooring
1.9 FPSO – Glas Dowr \u2013 Alongside Dynamic Mooring (2009)
1.10 Semi Sub – Sedex 701 \u2013 Alongside Dynamic Mooring (2009)
1.11 Jack Up – Hercules 185 \u2013 Alongside Dynamic Mooring (2009)
1.12 Semi Sub – Transocean Celtic Sea \u2013 Alongside Dynamic Mooring \u2013 Saldanha Bay (2011)
1.13 CALM Buoy \u2013 8 Point Offshore Dynamic Catenary Mooring PetroSA (2012)
1.14 Semi Sub ORCA Alongside Dynamic Mooring (Coega) (2013)
1.15 Scarabeo 7 (A Berth Cape Town) (2013)
1.16 Semi Sub Ensco E3001 – \u2013 Alongside Dynamic Mooring Cape Town (2014)
1.17 Dhirubhai Deepwater KG1 Drillship \u2013 Alongside Dynamic Mooring (2014)
1.18 Qurban Abasov 8 Point Catenary Mooring \u2013 Caspian Sea \u2013 standing off and gangway connected to a BP Platform (2014)
1.19 Transocean Marianas \u2013 Alongside Dynamic Mooring Coega (2015)
1.20 Maersk Deliverer \u2013 Alongside Dynamic Mooring Coega \u2013 (2015)
1.21 Semi Sub ORCA \u2013 Offshore Dynamic 9 Point Catenary Mooring at Mossel Bay \u2013 (2015)
1.22 Semi Sub CBC Newbuild \u2013 Offshore Dynamic 8 Point Catenary Mooring in Caspian Sea \u2013 (2016)
1.23 GTA FPSO – Alongside Dynamic Mooring Durban (2023)
1.24 SAIPEMI 12000 – Alongside Dynamic Mooring Coega (2024)<\/p>\n\n\n\n

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These were all analyzed for moorings for extended periods of stay in Cape Town, Walvis Bay, Saldanha Bay, Mossel Bay and lastly Caspian Sea and assumed 10yr, 25yr, 50yr and 100yr return wind and gust speeds, as applicable, or other applicable client supplied data. Most requiring foreign third party approval. The CALM Buoy is a permanent mooring off the coast of Mossel Bay \/ Agulhas. These were all TIME DOMAIN dynamic analysis, which would then predict peak line tensions, dynamic bollard reactions, dynamic fender reactions and displacements off and along the quay. Single line failure analysis would also be performed, as required by the various approval authorities.<\/p>\n\n\n\n

The offshore moorings cases would be analyzed for compliance against compliant with DNV os-e301_2010-10 and API RP 2SK and analyzed for both Diffraction Analysis (motions) and in the Time Domain (for dynamic prediction of mooring line responses and vessel offsets). ULS (Intact), ALS (Single Line Failure) and Transient Analysis (dynamic response prediction during line failure) is performed. Statistical Analysis of time series results are performed according to the requirements of DNV os-e301_2010-10.<\/p>\n\n\n\n

QURBAN ABASOV – Dynamic Mooring in the Caspian Sea (2014)<\/strong><\/p>\n\n\n\n

This catamaran shaped accommodation and supply vessel, chartered by BP, to offer crew accommodation and support for their Central Azari Oil Platform, off Baku in the Caspian Sea, required stringent dynamic mooring analysis, to ensure compliance for both Alongside the Platform, for servicing an articulated motion compensated gangway for crew changes, or whilst standing off, for severe weather scenarios, each with their own set of minimum requirements. The analysis being performed to DNV-OS-E301 and API Rp 2SK requirements, and approved by the BP Houston office.<\/p>\n\n\n\n

The 8 point mooring catenary spread made more complex by the very long, multi section mooring lines, comprising of chain, wire rope and dyneema fibre arranged in such a way as not to infringe or make contact with various subsea assets including gas and oil pipe lines, coupled to severe metocean conditions including 9m Significant Wave Height conditions (in certain directions). The analysis was performed as a Hydrodynamic Diffraction Analysis followed by Time Domain Analysis, using the ANSYS AQWA software suite.<\/p>\n\n\n\n

GENERAL FENDER BARGES AND DOCKING FRAMES<\/strong><\/p>\n\n\n\n

Triton has also designed numerous fender barges and docking frames, customised to the specific quay, so as to maintain the required fendered distance off the quay. Many of these frames are semi submersed to allow the semi submerged hull of the rig to bear directly against the frame which in turn, bears directly against the quay wall, at that same level.<\/p>\n","protected":false},"excerpt":{"rendered":"

Dynamic Mooring Analysis Non-linear dynamic (time domain) mooring analysis were performed on a number of Oil Rigs and FPSO’s as listed below. 1.1 F.P.S.O. Glas Dowr (2003) \u2013 Alongside Dynamic Mooring1.2 Semi Sub – South Seas Driller (Pride South Seas) \u2013 Alongside Dynamic Mooring1.3 Semi Sub – Gavea Lifter \/ Sedco 709 \u2013 Alongside Dynamic… Read More »Mooring Analysis<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","_themeisle_gutenberg_block_has_review":false,"footnotes":""},"_links":{"self":[{"href":"https:\/\/www.triton.co.za\/index.php\/wp-json\/wp\/v2\/pages\/54"}],"collection":[{"href":"https:\/\/www.triton.co.za\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.triton.co.za\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.triton.co.za\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.triton.co.za\/index.php\/wp-json\/wp\/v2\/comments?post=54"}],"version-history":[{"count":6,"href":"https:\/\/www.triton.co.za\/index.php\/wp-json\/wp\/v2\/pages\/54\/revisions"}],"predecessor-version":[{"id":1356,"href":"https:\/\/www.triton.co.za\/index.php\/wp-json\/wp\/v2\/pages\/54\/revisions\/1356"}],"wp:attachment":[{"href":"https:\/\/www.triton.co.za\/index.php\/wp-json\/wp\/v2\/media?parent=54"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}