Edit this text for your title Edit this text for your sub-title Presenter name, location, date etc. MEK 4450 Marine operations Kværner ASA, UiO, Oct. 2011.

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Edit this text for your title Edit this text for your sub-title Presenter name, location, date etc. MEK 4450 Marine operations Kværner ASA, UiO, Oct. 2011

About myself Helge Johnsgard PhD applied Mathematics, UiO Kværner Jacket technology

Safety moment

Summary of the course Brief introduction to marine operations Examples taken from three fields Brief description of project challenges Some simple analytical models Brief introduction to main numerical tools

Summary of the course WEEK 1WEEK 2 1. LectureIntroduction and summary Project challenges Laying of flexible elements 2. LectureDrag, added mass, Morisson equation Spring-mass Subsea module lifting 3. LectureHydrostatic model Frequency domain hydrodynamic Time domain analyses Platform installation

Typical marine operations

OIL COMPANY OIL EPC contractor T&I contractor National regulations Insurance company Warranty surveyor 3. Party verification

Project phases Early phase Key personnel Familiarization Identify critical activities Main planning phase Production of documents and drawings Purchase and produce equipment and tools Marine operations Mobilization Load-out Transport Installation De- mobilization

Your responsibility Ensure proper margins for…. Motions Forces Stability Accessibility ….induced by Static configuration Operational actions Environmental forces Interface Operational planning Procurement Client

Motions & clearances Shackle  pad eyes, chain links Lifted object  deck modules Towing wire  corners of towed object Vessel  platform leg openings Deck layout, seafastening Production tolerances Pendulum motion in crane Vessel motions Guiding. Openings Impact loads

Forces & structural capacity Forces in guiding systems Forces in lifting or tugging wires Loading of vessels and structures Local and global loads Bending and tension of cables Safety factors Material quality and sertificates

Stability & capacity Free floating: VCB, VCG, Water plane area Slack tanks Contact forces Airfilled compartmet Body interaction Capacity: sinking?

Weather sensivity Given design => proper engineering => given operational condition Uncertain weather forecasts => Alpha factor Waiting on weather Who’s paying? How to establish the actual weather conditions?

Heaven and hell Contract loyalty & honesty Interpretation of rules and regulations Sufficient time and resources for analysis