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中文 (中国)Offshore Structural Design: Jackets, Topsides and Mooring
FEYANA designs and analyses complex offshore structures: jackets, topsides and mooring structures, from FEED to detailed design and fabrication/installation support.
What we design
Jackets
Member and tubular joint layout, piles; strength, stability and joint fatigue checks.
Topsides
Decks, equipment support frames and lift points, coordinated with equipment layout.
Mooring and floating structures
Mooring, barge stability and motion analysis in sea states.
Key analyses
| Analysis | Purpose |
|---|---|
| In-place (operating, storm) | Member and joint strength/stability under wave, wind, current and equipment loads |
| Seismic | Structural response to earthquake loading as specified for the project |
| Fatigue | Cumulative fatigue damage at tubular joints and weld details |
| Pile–soil interaction | Pile capacity and foundation displacement |
| Pre-service | Load-out, transportation, lifting and temporary stability |
| Existing structure assessment | Re-assessment for new loads or life extension within structural integrity management |
Software and codes
Offshore structural analysis in SACS and SESAM; marine and stability analysis in MOSES and OrcaFlex; detailed FEA in ANSYS and ABAQUS. Design to API RP 2A, API RP 2SIM, AISC, DNV, ISO, ABS and project specifications.
Deliverables
- Design basis and load register
- Analysis models and calculation reports
- Design drawings, fabrication drawings and MTO
- Lifting, transportation and installation reports
- Responses to third-party / class comments
Process
- Collect data and requirements – design basis, environmental data, equipment loads, specified codes.
- Preliminary design – structural concept, initial sizing, weight estimate.
- Detailed analysis – analysis models, load combinations, strength, stability and fatigue checks.
- Evaluation and optimisation – weight reduction, simpler fabrication, constructability.
- Drawings and reports – calculation reports, construction drawings and full specifications.
Every stage passes 2–3 levels of engineering checks before issue.
See also: lifting, transportation & installation analysis · skid and module design.
Software and standard names are mentioned only to describe technical scope and belong to their respective owners. Images on this page are FEYANA models and workshop photos.
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