Training on OrcaFlex Software
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1 Training on OrcaFlex Software Duration & Location 3 Days Training in Aryatech Delhi Office ARYATECH MARINE & OFFSHORE SERVICES PVT LTD B-1, HAUZ KHAS, NEW DELHI Tel: , Fax: info@aryatech.net, support@aryatech.net Website:
2 Schedule: 1. The course assumes no prior experience with the software and is organised as a series of lectures and practical sessions each lasting typically 1½ hours to 2 hours. The course is intended to be hands on and we encourage attendees to follow the trainer s actions throughout. 2. The training will be carried out in three days. Training Material: 1. Workshop training material will be provided. 2. Software and key access to each individual candidate will be provided by Aryatech Marine & Offshore COURSE REQUIREMENTS 1. Attendees must bring their own laptops capable of running OrcaFlex software. Accommodation 1. Aryatech will provide the free accommodation. Certificates: 1. Upon completion of training, certificates will be provided by Aryatech. ARYATECH MARINE & OFFSHORE SERVICES PVT LTD Page 2
3 TRAINING SCHEDULE 1. Introduction to OrcaFlex Establish backgrounds and areas of interest Reasons for doing dynamic analysis Show some OrcaFlex examples: A01 (Catenary & Waves), A02 (Midwater Arch), B01 (Drilling), B06 (Running BOP), C05 (SPM), E03 (Pipelay), H01 (Chinese Lantern), Z02 (Zip wire) Do OrcaFlex tutorial: Show how to find tutorial (menu, toolbar and shortcut keys) Setting up a simple model (catenary line + vessel) Axis systems (global & local) Model browser, data forms, right click, default data and Help (F1) Statics (static results: tables, range graphs) Dynamics (replay: control & view parameters) Dynamic results (time histories, range graphs, X-Y graphs, linked statistics) Using live results and interrupting & extending simulations Copy / paste & exporting to file (views, graphs / tables, workspaces) Binary data files, text data files, simulation files Lines 2. Lines & Line Properties Line theory (nodes and segments) Sections, segmentation Connections, end conditions and end angles Contents (uniform, free-flooding, slug flow) Torsion (where appropriate, run-time & data implications) Clashing (enabling contact, effect of contact stiffness, use of clash energy) Line types Categories Line Type Wizard Right-click properties (applies for all objects) ARYATECH MARINE & OFFSHORE SERVICES PVT LTD Page 3
4 Attachments Lazy wave example (smeared using line type vs. discrete buoyancy using clumps) BSR modelling (using bend stiffener attachment) and TSJ modelling (using line type) 3. Worked Example Line Setup Wizard All-objects data form (polar / Cartesian coordinates) Lay azimuth (as laid direction) Grouping objects (create, duplicate, move & locate) Library facilities 4. Links, Winches and Shapes Links Connection data (to lines and other objects) Linear spring (no compression) Non-linear spring/damper (supports compression) Link connecting lines & link results Winches Connection data (to lines and other objects) Winch control (length or tension, by stage or whole simulation) Pull-in to a specific point & winch results Elastic solids / trapped water / drawing - applications Connections, geometry, contact stiffness, friction Example using line interacting with elastic solid (catenary over cylinder) Nodal interaction and locking 5. The Environment Sea properties Reynolds number (viscosity, temperature and formulations) Density (constant and spatially varying) Seabed Types of seabed (flat, profile, 3D), origin and direction Interpolation methods Contact stiffness and damping Non-linear hysteretic model with trenching, suction and re-penetration ARYATECH MARINE & OFFSHORE SERVICES PVT LTD Page 4
5 Current Interpolated data (profile, reference speed and direction) Power law data Use of variable data Multiple current data sets Ramping current in build-up Vary horizontally Wind Wind type options (constant, spectral and time history) Which objects affected Waves Regular and random (different wave types) Wave height, period and direction (spread waves) Wave preview (for random waves) Multiple wave trains 6. Buoys 3D Buoys 6D Buoys Draw parallel with data for clump attachments Irrotational example Degrees of freedom included Type (lumped / spar / towed fish) Lumped properties (arbitrary geometry) Distributed properties (axisymmetric geometry) Slam loads Wings, applied loads, buoys as attachments (torsion) Attaching buoys to buoys: composite objects and negligible lumped buoy properties 7. Vessels Overview Vessels and vessel types Three frequency regimes (zero, wave, low) Imposed and calculated options ARYATECH MARINE & OFFSHORE SERVICES PVT LTD Page 5
6 Vessels Position, heading etc. Statics, primary and secondary motion Imposed motions (prescribed, harmonic, time history, displacement RAOs) Calculated motions (3DOF, 6DOF, included effects) Vessel types Structure and conventions (symmetry) RAOs (displacement / load) RAO checks: graphs and replay in long wave Hydrodynamic data import Drawing (wire frame / shaded / origin for draught) 8. Statics, the General Data Form and Dynamics Statics overview: lines only and lines connected to other free objects Statics of lines only Step 1: (quick, catenary, prescribed, spline, user specified) Step 2 : full statics adds all relevant loads Statics of lines connected to other free objects Separate buoy and line (SBL) or whole system statics (WSS) Degrees of freedom included (buoy and vessels) Use calculated positions Convergence parameters (tolerance and minimum / maximum damping) Two lines & 6D buoy example (also showing rotational indeterminacy) The General Data Form Comment field, units Stages, ramping, sample interval (peak logging) Starting velocity Overview of Selecting Integration Method: Iterative vs. non-iterative Conditional and un-conditional stability Explicit Inner and outer time steps OrcaFlex recommended values for time step (shortest natural nodal period) ARYATECH MARINE & OFFSHORE SERVICES PVT LTD Page 6
7 Implicit Setting time steps Constant and variable step options Accuracy and time step sensitivity studies 9. How to Use OrcaFlex Efficiently QA checks of models: Mesh sensitivity Time history (settled dynamics) Movement at anchor (terminated model too soon) Compression (Euler buckling) File compare 10. Automation (OrcaFlex Spreadsheet) Script Tables (batch scripts and text data files) Batch Processing (running simulations) Instructions sheet (instructions wizard) Duplicate Instructions 11. Review, Questions and Worked Example Worked examples, or trainees own project models, and general discussion time: Modal analysis (resonance problems) Fatigue analysis (and wave scatter conversion) External functions and the dll VIV analysis Wake interference Regards Tarun Rewari Director Aryatech Marine & Offshore Services Pvt. Ltd ARYATECH MARINE & OFFSHORE SERVICES PVT LTD Page 7
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